Intel Computer Hardware PX875P User Manual

PX875P Series  
Copyright  
All rights are reserved. No part of this publication may be reproduced, transmitted, transcribed,  
stored in a retrieval system or translated into any language or computer language, in any form or by  
any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the  
prior written permission of the company. Brands and product names are trademarks or registered  
trademarks of their respective companies.  
The vendor makes no representations or warranties with respect to the contents herein and especially  
disclaim any implied warranties of merchantability or fitness for any purpose. Further the vendor  
reserves the right to revise this publication and to make changes to the contents herein without  
obligation to notify any party beforehand. Duplication of this publication, in part or in whole, is not  
allowed without first obtaining the vendor’s approval in writing.  
Trademark  
All the trademarks or brands in this document are registered by their respective owner.  
Disclaimer  
We make no warranty of any kind with regard to the content of this user’s manual. The content is  
subject to change without notice and we will not be responsible for any mistakes found in this user’s  
manual. All the brand and product names are trademarks of their respective companies.  
FCC Compliance Statement  
This equipment has been tested and found to comply with the limits of a Class B digital device,  
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection  
against harmful interference in a residential installation. This equipment generates, uses and can  
radiate radio frequency energy and, if not installed and used in accordance with the instructions, may  
cause harmful interference to radio communications. Operation of this equipment in a residential area  
is likely to cause harmful interference in which case the user will be required to correct the  
interference at his own expense. However, there is no guarantee that interference will not occur in a  
particular installation.  
CE Mark  
The device is in accordance with 89/336 ECC-ENC Directive.  
120410074M2N  
 
PX875P Series  
Intel® 82875P & ICH5  
Supports Socket 478 Intel® Pentium® 4 Processor  
User Manual  
Enabling Hyper-Threading for your computer system requires ALL of  
the following components  
z
CPU: An Intel® Pentium® 4 Processor with HT Technology  
z
z
z
Chipset: An Intel® Chipset that supports HT Technology  
BIOS: A BIOS that supports HT Technology must be enabled  
OS: An operating system that supports HT Technology  
For more information on Hyper-Threading Technology, go to:  
Dimensions (ATX form-factor):  
z
244mm x 305mm (WxL)  
Operating System:  
z
Supports most popular operating systems: Windows® 9X/ME/2000/XP etc.  
 
Contents  
 
PX875P PRO/ PX875P  
Chapter 1. Getting Started  
Introduction  
Congratulations on choosing the PX875P Series mainboard! The PX875P series includes the PX875P  
PRO (V2.0) and PX875P (V2.0). These are based on the 82875P Northbridge chipset and the ICH5  
Southbridge chipset. It supports Intel® Pentium® 4 Processors with a FSB (Front Side Bus) frequency  
of 400/ 533/ 800 MHz.  
The PX875P series provides 4 DIMM slots using 184 pin DDR SDRAM with a total capacity of up  
to 4GB. You can install “unbuffered/ non-ECC” or “unbuffered/ with ECC” DDR400/ 333/ 266  
(PC3200/ 2700/ 2100) SDRAM to the DIMM sockets. The PX875P series support dual channel data  
Bus for the DIMM slots.  
The PX875P series provide one 8X/ 4X AGP Slot that use 0.8V or 1.5V AGP cards.  
The PX875P series include built in IDE facilities that support Ultra ATA 33/66/100 BMIDE and PIO  
Modes. These also include built in Serial ATA facilities that supports SATA 150.  
The PX875P series come with an AC’97 Sound Codec (ALC655) which supports high quality 6  
channels audio (Super 5.1 Channel Audio Effect). It also supports Sony/ Philips Digital Interface  
(S/PDIF)  
The PX875P series come with eight USB 2.0 ports. These also include an infrared header.  
Besides the PX875P PRO V1.0 comes with a LAN Chip (3COM 3C920) which provides a back  
panel LAN port capable of 10/ 100 Mbit/s transmission speeds. And the PX875P PRO V2.0 also  
comes with a LAN Chip (Marvell MV8001) which provides a back panel LAN port capable of up to  
1Gbit/s transmission speeds.  
The company’s 3 Year Limited Warranty for this product covers both labor costs and replacement  
parts during the 1st year. Only labor costs are covered during the 2nd and 3rd years (replacement  
parts will be charged during the 2nd and 3rd years).  
All of the information in this manual only for reference. This specification is subject to change  
without notice.  
1
 
 
PX875P PRO/ PX875P  
Specification  
CPU:  
z
Supports Socket 478 Pentium® 4 processor (Northwood/ Prescott)  
Supports Hyper Threading Technology  
z
Speed:  
z
z
z
400/ 533/ 800 MHz Front Side Bus frequency  
33MHz, 32 bit PCI interface (PCI 2.2 compliant)  
66MHz AGP 3.0 compliant interface that supports 8X/4X data transfer modes (0.8V or  
1.5V)  
Chipset:  
z
z
z
z
z
Northbridge Chip (MCH) – Intel 82875P  
Southbridge Chip (ICH) – Intel ICH5  
I/O Controller – Winbond W83627THF  
AC’97 Codec – Realtek ALC655  
LAN Controller – 3COM 3C920 (PX875P PRO V1.0)  
Marvell MV8001 (PX875P PRO V2.0)  
DRAM Memory:  
z
Supports DDR400 (PC3200)/ DDR333 (PC2700)/ DDR266 (PC2100) SDRAM DIMMs  
z
Supports 64 MB/ 128 MB/ 256 MB/ 512 MB/ 1 GB unbuffered/ non-ECC or unbuffered/  
with ECC DIMM modules  
z
z
z
Supports memory modules with a total capacity of 4 GB  
Supports dual-channel data bus (see memory installation section for more details)  
Supports only x8, x16, DDR devices with four banks  
Green Functionality:  
z
Supports Phoenix-Award BIOS ™ power management functionality  
z
Wakes from power saving sleep mode with any keyboard or mouse activity  
Shadow RAM:  
z
These mainboard equipped with a memory controller providing shadow RAM and support  
for ROM BIOS  
2
 
 
PX875P PRO/ PX875P  
BUS Slots:  
z
AGP slot (AGP3.0, 4X/ 8X) x 1  
z
32-bit PCI bus slot x 5  
Flash Memory:  
z
Supports flash memory functionality  
z
Supports ESCD functionality  
Hardware Monitor Function:  
z
Monitors all fan Speeds  
z
Monitors System Voltage  
Infrared:  
z
Supports IrDA Version 1.0 SIR Protocol with a maximum baud rate of up to 115.2 Kbps  
z
Supports SHARP ASK-IR Protocol with maximum baud rate of up to 57600 bps  
3COM LAN Chip on board: (only for PX875P PRO V1.0)  
z
10/ 100 Mbps Ethernet support  
Marvell LAN Chip on board: (only for PX875P PRO V2.0)  
z
10/100/1000 Mbps triple-speed operation  
AC’97 Sound Codec Onboard:  
z
z
z
z
z
High performance CODEC with high S/N ratio (>90 dB)  
Compliant with AC’97 2.2 specification  
6-channel playback capability (Super 5.1 Channel Audio Effect)  
3D Stereo enhancement  
Sony/ Philips Digital Interface (S/PDIF)  
IDE Facilities:  
z
z
z
z
Supports Ultra ATA 33, Ultra ATA 66, Ultra ATA 100, BMIDE and PIO modes  
Supports IDE interface with CD-ROM  
Supports high capacity hard disk drives  
Supports installation of up to 4 drives, with separate IDE connections for Primary and  
Secondary connectors  
3
 
PX875P PRO/ PX875P  
Universal Serial Bus:  
z
Supports up to eight USB ports for USB interface devices  
z
Supports USB 2.0 Enhanced Host Controller Interface (EHCI) and USB 1.1 Open Host  
Controller Interface (OHCI)  
Serial ATA facilities:  
z
Compatible with SATA Spec 1.0  
z
Supports Serial ATA specification of 150 MB/sec transfers  
I/O facilities:  
z
One multi-mode Parallel Port capable of supporting the following specifications:  
1. Standard & Bi-direction Parallel Port  
2. Enhanced Parallel Port (EPP)  
3. Extended Capabilities Port (ECP)  
z
z
z
z
z
Supports two serial ports, 16550 UART  
Supports Infrared Data Transmission using IrDA  
Supports PS/2 mouse and PS/2 keyboard  
Supports 360 KB, 720 KB, 1.2 MB, 1.44 MB, and 2.88 MB floppy disk drives  
Game port/ MIDI port compatible (only for V1.0)  
BIOS:  
z
z
z
Phoenix-Award™ BIOS  
Supports APM1.2  
Supports ACPI power management  
AGP protection:  
z
This mainboard provides an AGP slot for 0.8V/ 1.5V AGP cards. The AGP protection  
function is to protect the mainboard and AGP cards if a 3.3V card is installed  
Watch Dog Timer:  
z
This mainboard contains a special feature called the “Watch Dog Timer” which is used to  
detect when the system is unable to handle over-clocking configurations during the POST  
stage. Once a problem is detected the system will reset the configurations and reboot the  
system after five seconds  
4
 
PX875P PRO/ PX875P  
Quick Content Table  
Function  
CPU Socket 478  
Content Location  
Page  
10  
U8  
DIMM 1234  
ATX_12VATX_ PWR  
DDR DIMM Slots  
ATX Power Connector  
11  
21  
IDE ConnectorsSATA Connectors IDE1/2SATA1/2  
16  
FDC Connector  
AGP Slot  
FDC  
16  
AGP  
21  
PCI 12345  
PCI Slots  
21  
CPU FANChassis FAN、  
Auxiliary FAN  
CPUFANCHASFANAUXFAN  
11  
SW/LEDPWRLEDSPEAKER  
Front Panel Indicator  
15  
17  
17  
18  
18  
20  
19  
19  
13  
Infrared Connector  
IrDA  
USB2USB3USB4  
JP1  
Front USB Headers  
Clear CMOS Jumper  
Case Open Warning Function  
CASE OPEN  
Sony/Philips Digital Interface Conn. S/PDIF  
CD-ROM Audio IN Header  
Front Panel Audio Header  
PC99 Color Codec Back Panel  
CD-IN  
FRONT AUDIO  
Back Panel Connector  
5
 
 
PX875P PRO/ PX875P  
Configuration  
Layout of PX875P PRO  
KB/MS  
ATX_12V  
USB/LAN  
ATX_PWR  
U8  
PRT/COM  
U12  
1
CPUFAN  
SOUND  
Intel  
82875P  
IDE2 IDE1  
AUXFAN  
1
AGP  
ALC  
655  
PCI1  
PCI2  
BAT1  
3COM  
LAN  
2
U19  
10  
9
1 USB4  
PCI3  
Intel  
ICH5  
1
JP1  
1
CASE OPEN  
SATA2  
SATA1  
U21  
PCI4  
PCI5  
FDC  
CHASFAN  
1
1
USB2 USB3  
PWRLED  
2
1
2
1
10  
9
10  
9
2
1
2
2
1
1
1
1
1
SPEAKER  
CD-IN  
SPDIF  
SW/LED  
FRONT AUDIO  
IrDA  
6
 
 
PX875P PRO/ PX875P  
Layout of PX875P  
KB/MS  
ATX_12V  
USB  
ATX_PWR  
U8  
PRT/COM  
U12  
1
CPUFAN  
SOUND  
Intel  
82875P  
IDE2 IDE1  
AUXFAN  
1
AGP  
ALC  
655  
PCI1  
PCI2  
PCI3  
BAT1  
U19  
10  
9
2
1 USB4  
Intel  
ICH5  
1
JP1  
CASE OPEN  
1
SATA2  
SATA1  
U21  
PCI4  
PCI5  
FDC  
CHASFAN  
1
1
USB2 USB3  
PWRLED  
2
1
2
1
10  
9
10  
9
2
1
2
2
1
1
1
1
1
SPEAKER  
CD-IN  
SPDIF  
IrDA  
SW/LED  
FRONT AUDIO  
7
 
 
PX875P PRO/ PX875P  
Layout of PX875P PRO V2.0  
KB/MS  
ATX_12V  
USB  
ATX_PWR  
U8  
PRT/COM  
1
U12  
CPUFAN  
USB/LAN  
Intel  
82875P  
IDE2 IDE1  
AUXFAN  
1
AGP  
PCI1  
PCI2  
PCI3  
LAN  
Controller  
BAT1  
U19  
U21  
Intel  
ICH5  
1
JP1  
CASE OPEN  
1
SATA2  
SATA1  
PCI4  
PCI5  
ALC  
655  
FDC  
CHASFAN  
1
1
USB2 USB3  
PWRLED  
2
1
2
1
10  
9
10  
9
2
1
2
1
2
1
1
1
1
SPEAKER  
CD-IN  
SPDIF  
IrDA  
SW/LED  
FRONT AUDIO  
8
 
 
PX875P PRO/ PX875P  
Layout of PX875P V2.0  
KB/MS  
ATX_12V  
USB  
ATX_PWR  
U8  
PRT/COM  
1
U12  
CPUFAN  
USB  
Intel  
82875P  
IDE2 IDE1  
AUXFAN  
1
AGP  
PCI1  
PCI2  
BAT1  
U19  
U21  
PCI3  
Intel  
ICH5  
1
JP1  
CASE OPEN  
1
SATA2  
SATA1  
PCI4  
PCI5  
ALC  
655  
FDC  
CHASFAN  
1
1
USB2 USB3  
PWRLED  
2
1
2
1
10  
9
10  
9
2
1
2
1
2
1
1
1
1
SPEAKER  
CD-IN  
SPDIF  
IrDA  
SW/LED  
FRONT AUDIO  
9
 
 
PX875P PRO/ PX875P  
Hardware Installation  
This section will assist you in quickly installing your system hardware. Wear a wrist ground strap  
before handling components. Electrostatic discharge may damage your system components.  
CPU Processor Installation  
This mainboard supports Intel® Pentium® 4 processors using a Socket 478. Before building your  
system, we suggest you visit the Intel website and review the processor installation procedures.  
CPU Socket 478 Configuration Steps:  
1. Locate the CPU socket on your mainboard and nudge the lever away from the socket. Then lift  
the lever to a 90-degree angle.  
2. On the socket, locate the corner that has the pin-1 receptor. This corner will be near to the end of  
the lever. Match the dot on the CPU with the pin-1 receptor on the socket and lower the CPU onto the  
socket. The bottom of the CPU should be flush with the face of the socket.  
Dot  
Pin1 Receptor  
3. Lower the lever until it snaps back into position. This will lock down the CPU.  
4. Smear thermal grease on top of the CPU. Lower the CPU fan onto the CPU and use the clasps on  
the fan to attach it to the socket. Finally, extend the power cable from the fan and insert it onto the  
CPUFAN adapter.  
Attention  
Overheating may damage the CPU and other sensitive components.  
Please check the installation completely before starting the system.  
Make sure the heatsink and the CPU fan are properly installed.  
10  
 
 
PX875P PRO/ PX875P  
FAN Headers  
Three power headers are available for cooling fans, which play an important role in maintaining the  
ambient temperature in your system.  
KB/MS  
ATX_12V  
ATX_ PWR  
US B/LAN  
Sensor  
U8  
PRT/COM  
+12V  
Ground  
1
CPUFAN  
U12  
1
CP UFAN  
SOUND  
Intel  
82875P  
IDE2 IDE1  
AUXFAN  
1
+12V  
Ground  
Winbond  
W83627HF  
AGP  
ALC  
650  
Sensor  
PCI1  
PCI2  
PCI3  
PCI4  
PCI5  
Sensor  
+12V  
Ground  
BAT1  
3COM  
LAN  
U19  
1
10  
2
1
9
1 US B4  
Intel  
ICH5  
1
JP1  
CA SE  
1
O
PEN  
SATA2  
SATA1  
U21  
AUXFAN  
CHASFAN  
FDC  
CHASFAN  
1
US B3  
US B2  
PWRLED  
2
1
1
2
1
2
1
10  
2
1
2
1
1
9
1
KER  
F
RO NT AU DI  
O
CD-IN SPDIF  
SW/LED  
IrDA  
Attention  
We strongly recommend that you use a CPU fan sink with your  
CPU. You can attach the CPU fan sink to the CPUFAN Header.  
Memory Installation  
The series contains 4 memory slots which use 184 pin DDR SDRAM with a total memory capacity  
of up to 4 GB. You can install unbuffered/non-ECC or with ECC DDR DIMMs. It supports DDR266  
when installed with CPUs that have clock speeds of 100 MHz. It supports DDR266/333 when  
installed with CPUs that have clock speeds of 133 MHz. And it supports also DDR266/320/400 when  
installed with CPUs that have CPU clock speeds of 200 MHz.  
The series provides Dual-Channel functionality for its DIMM slots. DIMM1 and DIMM2 share one  
channel, while DIMM3 and DIMM4 share the other channel. Enabling dual channels can increase  
your data access rates.  
BIOS  
DIMM1  
Socket 478  
DIMM2  
DIMM1  
DIMM2  
DIMM3  
DIMM4  
DIMM3  
DIMM4  
11  
 
 
PX875P PRO/ PX875P  
To Enable Dual-Channel DDR, the following conditions must be met:  
1.You must use either DIMM1 & DIMM3 together or DIMM2 & DIMM4 together or all four DIMM  
slots together.  
2.You must use matching DIMM configurations between DIMM1 & DIMM3. You must use  
matching DIMM configurations between DIMM2 & DIMM4.  
z
z
z
z
z
z
z
Same Density (128MB, 256MB, 512MB, etc.)  
Same DRAM technology (128Mb, 256Mb, or 512Mb)  
Same DRAM bus width (x8 or x16)  
Both either single-sided or dual-sided  
Same brand  
Same timing specifications  
Same DDR speed  
A => Memory Module Type A, B => Memory Module Type B, X => None.  
DIMM1  
DIMM2  
DIMM3  
DIMM4  
A
B
A
B
A
B
X
X
A
B
B
A
X
X
A
B
A
B
A
B
A
B
X
X
A
B
B
A
X
X
A
B
RAM Module Installation:  
1. Pull the white plastic tabs on each side of the slot away from the slot.  
2. Match the notch on the button of the RAM module with the corresponding pattern in the DIMM  
slot. This ensures that the module is inserted properly.  
3. Lower the RAM module into the DIMM Slot and press firmly using both thumbs until the module  
snaps into place.  
4. Repeat steps 1, 2 & 3 for the remaining RAM modules.  
The pictures above are for reference only.  
12  
 
PX875P PRO/ PX875P  
Back Panel Configuration  
(optional)  
(optional)  
LAN  
PS/2  
PS/2  
Game Port  
Printer Port  
Printer Port  
LAN  
Mouse  
Mouse  
Mic In  
Line In  
Speaker  
Out  
USB  
USB  
USB  
COM1  
COM2  
COM1  
COM2  
PS/2  
PS/2  
Speaker  
Out  
Mic In  
Keyboard  
Keyboard  
Line In  
(For V1.0)  
(For V2.0)  
PS/2 Mouse & PS/2 Keyboard Connectors: KB/MS  
The series mainboard provides a standard PS/2 mouse connector and PS/2 Keyboard connector. The  
pin assignments are described below:  
PS/2 Mouse  
Pin Assignment Pin Assignment  
1
2
3
Data  
4
5
6
+5 V (fused)  
Clock  
No connect  
Ground  
No connect  
PS/2 Keyboard  
USB & LAN Connectors: USB/ (LAN is optional)  
There are two USB connectors on the back panel with V1.0, and there are four USB connectors on  
the back panel with V2.0. These USB connectors are used to attach to USB devices such as:  
keyboards, mice and other USB devices. You can plug the USB devices directly into this connector.  
The PX875P PRO (V1.0 & V2.0) also provides a LAN port. You can plug LAN devices directly into  
this connector.  
Pin Assignment Pin Assignment  
1
2
3
4
TX+  
TX-  
RX+  
NC  
5
6
7
8
NC  
RX-  
NC  
(Optional)  
LAN  
NC  
Pin Assignment Pin Assignment  
USB  
1/5  
2/6  
+5 V (fused)  
USBP0-/P1-  
3/7  
4/8  
USBP0+/P1+  
Ground  
13  
 
 
PX875P PRO/ PX875P  
Serial and Parallel Interface Ports  
The series mainboard comes equipped with two serial ports and one parallel port on the back panel.  
These interface ports will be explained below.  
Printer Port  
COM1  
COM2  
Parallel Interface Port: PRT  
The parallel port on your system has a 25-pin, DB25 connector and is used to interface with parallel  
printers and other devices using a parallel interface.  
The Serial Interface: COM1/ COM2  
The serial interface port is sometimes referred to as an RS-232 port or an asynchronous  
communication port. Mice, modems and other peripheral devices can be connected to a serial port.  
Game Port Connector (only for PX875P PRO V1.0)  
This connector allows you to connect a joystick or game pad for playing computer games. This port  
can also be used to connect to MIDI devices.  
Audio Port Connectors  
This mainboard comes equipped with three Audio Ports. The three ports, Mic-in, Line-in and  
Speaker-out are standard audio ports that provides basic audio functionality. After you install the 5.1  
Channel drivers and setup 5.1 channel Audio effect, the three audio ports are enabled for 5.1 channel  
and supporting two speakers each.  
Game Port  
Mic In  
Line In  
Speaker  
Out  
Speaker Out  
Mic In  
Line In  
(For V1.0)  
(For V2.0)  
Speaker-Out Connects to standard audio speakers or headphones. This port becomes the front  
speakers when 5.1 Channel Audio Effects driver is installed and enabled.  
Line In Connects to an external audio device such as a CD player, tape player or other audio devices  
that provide audio input. This port becomes the rear speakers when 5.1 Channel Audio Effects driver  
is installed and enabled.  
Mic In Connects to a microphone. This port becomes the subwoofer/center out when 5.1 Channel  
Audio Effects driver is installed and enabled.  
This mainboard supports Super 5.1 Channel Audio effects which turns  
your standard Speaker Out, Lin In, Mic In audio connectors into a 6  
channel audio system. See Appendix II for more information.  
14  
 
PX875P PRO/ PX875P  
Front Panel Indicator: SW/LED  
PWRLEDSPEAKER  
BIOS  
PC_BEEP  
NC  
Ground  
+5V  
1
2
3
4
Socket 478  
SPEAKER  
+
-
1
3
DIMM1  
DIMM2  
DIMM3  
DIMM4  
PWRLED  
1 2  
HD LED (+)  
HD LED (-)  
Reset Control (-)  
Reset Control (+)  
NC  
Power LED (+)  
Power LED (-)  
Power Button (+)  
Power Button (-)  
NC  
Hard Driver  
LED  
Power  
LED  
Reset  
Power-on  
Button  
Button  
9 10  
SW/LED  
HD LED (Hard Drive LED Header)  
This header can be attached to an LED on the front panel of a computer case. The LED will flicker  
during disk activity. This disk activity only applies to those IDE drives directly attached to the system  
board.  
RST SW (Reset Switch Header)  
This header can be attached to a momentary SPST switch. This switch is normally left open. When  
closed it will cause the mainboard to reset and run the POST (Power On Self Test).  
ACPI-LED (2-pin Power LED Header)  
The mainboard provides two power LED header. If there is a 2-pin power LED cable on the front  
panel of a computer case. You can attach it to the 2-pin power LED header. The LED will illuminate  
while the computer is powered on.  
PWR SW (Power on Switch Header)  
This header can be attached to a front panel power switch. The switch must pull the Power Button pin  
to ground for at least 50 ms to signal the power supply to switch on or off (the time required is due to  
internal debounce circuitry on the system board). At least two seconds must pass before the power  
supply will recognize another on/off signal.  
PWR-LED (3-Pin Power LED Header)  
The mainboard provides two power LED header. If there is a 3-pin power LED cable on the front  
panel of a computer case. You can attach it to the 3-pin power LED header.  
SPEAKER (Speaker Header)  
A front panel speaker can be connected to this header. When you boot your computer, the speaker  
sounds a short “beep”. If there is something wrong during the Power On Self-Test, the speaker  
sounds “irregular beep” to warning you.  
15  
 
 
PX875P PRO/ PX875P  
Connectors  
Floppy Disk Connector: FDC  
The series mainboard provides a standard floppy disk connector (FDC) that supports 360K, 720K,  
1.2M, 1.44M and 2.88M floppy diskettes. This connector supports the floppy drive ribbon cables  
provided in the packaging.  
Hard Disk Connectors: IDE1-2/ SATA1-2  
The series mainboard has a 32-bit Enhanced PCI IDE Controller that supports PIO Mode 0~4, Bus  
Master, Ultra ATA 33/ 66/ 100. This mainboard has two IDE connectors, IDE1 (primary) and IDE2  
(secondary). It also provides two serial ATA connectors.  
IDE1 (Primary IDE Connector)  
You can connect up to two hard drives to IDE1. If you attach two drives, you must use a ribbon cable  
with three connectors. You must also configure one drive as the master and one drive as the slave,  
using the jumpers located on each drive.  
IDE2 (Secondary IDE Connector)  
The IDE2 connector can also support a Master and a Slave drive. The configuration is similar to  
IDE1. The second drive on this controller must be set to slave mode.  
SATA1/ SATA2  
These SATA connectors support Serial ATA 150. These connectors only can connect to one serial  
ATA hard disk each.  
BIOS  
Socket 478  
DIMM1  
DIMM2  
DIMM3  
DIMM4  
FDC  
SATA1  
IDE2  
IDE1  
SATA2  
16  
 
 
PX875P PRO/ PX875P  
Headers & Jumpers  
Front USB Headers: USB2/ USB3/ (USB4 for V1.0 only)  
The V1.0 series mainboard provide three USB headers (USB2/ 3/ 4) on the board allowing for 6 USB  
ports. And the V2.0 series mainboard provide two USB headers (USB2/ 3) on the board allowing for  
4 USB ports. These attach to USB connectors embedded into the computer case or connected to a  
USB bracket (optional).  
BIOS  
1 2  
Socket 478  
5VSB  
DATA_A-  
DATA_A+  
Ground  
NC  
5VSB  
DATA_B-  
DATA_B+  
Ground  
NC  
910  
DIMM1  
DIMM2  
USB2/3/4  
DIMM3  
DIMM4  
USB Bracket (optional)  
An optional USB bracket may be included with your board. The bracket is typical secured to the back  
side of your computer case and has standard USB ports that you can connect to external USB devices.  
The bracket will also have cables that you can extend to the USB2, USB3 or USB4 (the USB4 header  
only for PX875P PRO V1.0) headers.  
* If you are using USB 2.0 devices with Windows 2000/ XP, you will need to install the USB 2.0  
driver from the Microsoft® website.  
Infrared Header: IrDA  
This IrDA connector can be configured to support wireless infrared and is used to attach to an  
infrared sensing device. After the IrDA interface is configured, you can use this connector for  
connectionless data transfer to and from portable devices such as laptops and PDAs.  
BIOS  
1 2  
NC  
+5V  
IR_TX  
NC  
Ground  
IR_RX  
Socket 478  
5 6  
IrDA  
DIMM1  
DIMM2  
DIMM3  
DIMM4  
17  
 
 
PX875P PRO/ PX875P  
Case Open Warning Jumper: CASE OPEN  
This connector is used to notify the user when the computer case has been previously opened. To  
configure this functionality, your computer case must be equipped with a “case open” cable which  
you need to attach to the CASE OPEN jumper. Also, you must enable CASE OPEN warning  
functionality in the BIOS setup utility. When your computer case is opened, your system will display  
alert messages upon boot up. Note that your computer case must be equipped with a “case open”  
cable.  
BIOS  
Socket 478  
Caseop-  
Ground  
1
2
DIMM1  
DIMM2  
CASE OPEN  
DIMM3  
DIMM4  
Clear CMOS Jumper: JP1  
The “Clear CMOS” jumper is used when you cannot boot your system due to some CMOS  
configuration problem such as a forgotten password. This jumper allows you to reset the CMOS  
configurations, and then reconfigure.  
BIOS  
Pin1-2 short  
Normal (default)  
Pin2-3 short  
1
2
3
Socket 478  
JP1  
1
2
3
Clear CMOS data  
DIMM1  
DIMM2  
JP1  
(Short means to cover two pins on  
a jumper using a jumper cap.)  
DIMM3  
DIMM4  
1.  
2.  
3.  
4.  
5.  
6.  
Turn off your system and disconnect the AC power cable.  
Set JP1 to OFF (2-3 Closed).  
Wait several seconds.  
Set JP1 to ON (1-2 closed).  
Connect the AC power cable and turn on your system.  
Reset your desired password.  
18  
 
PX875P PRO/ PX875P  
Audio Connectors  
This mainboard provides three connectors as part of its audio Subsystem.  
1 2  
MIC  
MIC_VREF  
Front out_R  
NC  
Ground  
+5V  
Rear out_R  
NC  
Front out_L  
Rear out_L  
FRONT AUDIO  
BIOS  
1
2
3
4
Left In  
Ground  
Ground  
Right In  
Socket 478  
CD-IN  
1
2
3
4
5
+5V  
NC  
SPD_OUT  
Ground  
SPD_IN  
DIMM1  
DIMM2  
DIMM3  
DIMM4  
SPDIF  
CD-ROM Audio-In Header: CD-IN  
This header is used to connect to a CD-ROM / DVD audio cable.  
Front Panel Audio Header: FRONT AUDIO  
If your computer case has been designed with embedded audio equipment or you are using an audio  
bracket (optional). You can attach these components to the FRONT_AUDIO header of the  
mainboard. First remove the jumper caps covering the FRONT_AUDIO pins. Use pins 1, 3 to  
connect to the case microphone. Use pins 9,5 to connect to the earphone. If you do not intend to use  
the FRONT_AUDIO panel, do not remove the jumper caps. The front panel audio & the back panel  
audio can not use simultaneously.  
Attention  
If the jumper caps are in place, jumper cap 1 is on pin 5, pin 6 and  
jumper cap 2 is on pin 9, pin 10. If you do not intend to use the  
FRONT_AUDIO panel, do not remove the jumper caps.  
19  
 
 
PX875P PRO/ PX875P  
S/PDIF Header: SPDIF  
S/PDIF (Sony/Philips Digital Interface) is an audio transfer file format, which provides high quality  
audio using optical fiber and digital signals. This mainboard is capable of delivering audio output and  
receiving audio input through the SPDIF header. One way you would use this header is by using an  
SPDIF & FRONT AUDIO bracket (optional) attached to your computer. This bracket will have two  
wires that you can attach to the SPDIF header and the FRONT_AUDIO header. This bracket has  
RCA connectors similar to that used with most consumer audio products. Using the RCA connectors,  
the data can then be output to and input from an S/PDIF device. This bracket will also have the  
TOS-LINK connectors. You can also use the TOS-LINK connectors to output audio to an S/PDIF  
device. The devices that are receiving and sending information from this header must be S/PDIF  
compliant for optimal effect. Note that the SPDIF bracket is optional in the packaging that comes  
with this mainboard.  
SPDIF & FRONT AUDIO bracket (Optional)  
You can connect the bracket to the SPDIF and FRONT AUDIO Headers.  
SPDIF Wire  
SPDIF OUT(RCA Conn.)  
SPDIF OUT (Tos-link Conn.)  
SPDIF IN (RCA Conn.)  
Earphone  
Microphone  
FRONT AUDIO Wire  
20  
 
PX875P PRO/ PX875P  
Slots  
The slots in this mainboard are designed for expansion cards used to complement and enhance the  
functionality of the mainboard.  
PCI Slots AGP Slot  
BIOS  
Socket 478  
DIMM1  
DIMM2  
DIMM3  
DIMM4  
AGP Slot: AGP  
This mainboard is equipped with an Accelerated Graphics Port (AGP) that supports 0.8V/1.5V AGP  
cards only. This mainboard also comes with AGP protection which ensures that you only install  
0.8V/1.5V AGP cards.  
PCI Slots: PCI1-5  
This mainboard is equipped with 5 standard PCI slots. PCI stands for Peripheral Component  
Interconnect and is a bus standard for expansion cards. This PCI slot is designated as 32 bit.  
Power Supply Attachments  
ATX Power Connector: ATX_12V & ATX_PWR  
This mainboard requires two ATX power connections; a 20-pin connector and a 4-pin connector.  
Your power supply must have both connectors. Attach the 4-pin connector first, then attach the  
20-pin connector. Make sure the connectors are secure before applying power.  
KB/MS  
ATX_ 12V  
ATX_ PWR  
US B/LAN  
U8  
PRT/COM  
+12V  
5.0V_SB  
PW_OK  
Ground  
+5.0V  
+5.0V  
Ground  
+12V  
Ground  
+12V  
+5.0V  
+5.0V  
Ground  
Ground  
Ground  
PS_ON  
Ground  
-12V  
Ground  
+5.0V  
U12  
ATX_12V  
1
CP UFAN  
SOUND  
Gruond  
+3.3V  
+3.3V  
Intel  
82875P  
IDE2 IDE1  
AUXFAN  
+3.3V  
1
Winbond  
W83627HF  
AGP  
ALC  
650  
PCI1  
ATX_PWR  
BAT1  
PCI2  
PCI3  
3COM  
LAN  
U19  
2
10  
9
1 US B4  
Intel  
ICH5  
1
1
JP1  
CA SE  
O
PEN  
SATA2  
SATA1  
U21  
PCI4  
PCI5  
FDC  
CHASFAN  
1
US B2 US B3  
PWRLED  
1
10  
2
1
2
1
2
2
1
2
1
10  
1
1
9
9
1
1
SPEAKER  
F
RO NT AU DI  
O
CD-IN SPDIF  
SW/LED  
IrDA  
21  
 
 
PX875P PRO/ PX875P  
Chapter 2. BIOS Setup  
Introduction  
This section describes PHOENIX-AWARD™ BIOS Setup program which resides in the BIOS  
firmware. The Setup program allows users to modify the basic system configuration. The  
configuration information is then saved to CMOS RAM where the data is sustained by battery after  
power-down.  
The BIOS provides critical low-level support for standard devices such as disk drives, serial ports  
and parallel ports. As well, the BIOS controls the first stage of the boot process, loading and  
executing the operating system.  
The PHOENIX-AWARDTM BIOS installed in your computer system’s ROM is a custom version of  
an industry standard BIOS. This means that it supports the BIOS of Intel® based processors.  
This version of the PHOENIX-AWARDTM BIOS includes additional features such as virus and  
password protection as well as special configurations for fine-tuning the system chipset. The defaults  
for the BIOS values contained in this document may vary slightly with the version installed in your  
system.  
Plug and Play Support  
This PHOENIX-AWARD™ BIOS supports the Plug and Play Version 1.0A specification as well as  
ESCD (Extended System Configuration Data) write.  
EPA Green PC Support  
This PHOENIX-AWARD™ BIOS supports Version 1.03 of the EPA Green PC specification.  
APM Support  
This PHOENIX-AWARD™ BIOS supports Version 1.1 & 1.2 of the Advanced Power Management  
(APM) specification. These features include system sleep and suspend modes in addition to hard disk  
and monitor sleep modes. Power management features are implemented using the System  
Management Interrupt (SMI).  
PCI Bus Support  
This PHOENIX-AWARD™ BIOS also supports Version 2.3 of the Intel PCI (Peripheral Component  
Interconnect) local bus specification.  
22  
 
 
PX875P PRO/ PX875P  
DRAM Support  
DDR (Double Data Rate) SDRAM (Synchronous DRAM) is supported.  
Supported CPUs  
This PHOENIX-AWARD™ BIOS supports the Intel® Pentium® 4 CPUs.  
Key Function  
In general, you can use the arrow keys to highlight items, press <Enter> to select, use the <PgUp>  
and <PgDn> keys to change entries, press <F1> for help and press <Esc> to quit. The following table  
provides more detail about how to navigate within the BIOS Setup program.  
Keystroke  
Up arrow  
Down arrow  
Left arrow  
Right arrow  
Esc  
Function  
Move to previous item  
Move to next item  
Move to the item on the left (menu bar)  
Move to the item on the right (menu bar)  
Main Menu: Quit without saving changes  
Submenus: Exit Current page to the next higher level menu  
Move to the item you desire  
Move Enter  
PgUp key  
PgDn key  
+ Key  
Increase the numeric value or enter changes  
Decrease the numeric value or enter changes  
Increase the numeric value or enter changes  
Decrease the numeric value or enter changes  
Main Menu – Quit and do not save changes into CMOS  
Status Page Setup Menu and Option Page Setup Menu – Exit  
Current page and return to Main Menu  
General help on Setup navigation keys  
Load previous values from CMOS  
- Key  
Esc key  
F1 key  
F5 key  
F6 key  
F7 key  
F10 key  
Load the defaults from BIOS default table  
Load the turbo defaults  
Save all the CMOS changes and exit  
23  
 
PX875P PRO/ PX875P  
Main Menu  
When you enter the PHOENIX-AWARD™ BIOS Utility, the Main Menu will appear on the screen.  
The Main menu allows you to select from several configuration options. Use the left/right arrow keys  
to select a particular configuration screen from the top menu bar or use the down arrow key to access  
and configure the information below.  
24  
 
 
PX875P PRO/ PX875P  
Main Menu Setup Configuration Options  
Item  
Options  
mm dd yyyy  
Hh: mm: ss  
Description  
Set the system date. Note that the ‘Day’ automatically  
changes when you set the date.  
Date  
Time  
IDE Channel 0  
Master  
Set the current time of the system.  
Options contained in  
sub menu.  
Press <Enter> to enter the sub menu.  
IDE Channel 0 Options contained in  
Slave sub menu.  
Press <Enter> to enter the sub menu.  
Press <Enter> to enter the sub menu.  
Press <Enter> to enter the sub menu.  
IDE Channel 1 Options contained in  
Master sub menu.  
IDE Channel 1 Options contained in  
Slave  
sub menu.  
None  
360k, 5.25 in  
1.2M, 5.25 in  
720K, 3.5 in  
1.44M, 3.5 in  
2.88M, 3.5 in  
EGA/VGA  
Driver A  
Select the type of floppy disk drive installed in your system.  
CGA 40  
Video  
Select the default video device.  
CGA 80  
MONO  
All Errors  
No Errors  
Select the situation in which you want the BIOS to stop the  
POST process and notify you.  
Halt On  
All, but Keyboard  
All, but Diskette  
All, but Disk/ Key  
Options contained in  
sub menu.  
Security  
Press <Enter> to enter the sub menu.  
Displays the amount of  
conventional memory  
Base Memory  
N/A  
detected during boot up.  
Displays the amount of  
Extended  
Memory  
N/A  
N/A  
extended memory detected during boot up.  
Displays the total memory available in the system.  
Total Memory  
25  
 
PX875P PRO/ PX875P  
Advanced BIOS Features  
Removable Device Priority  
Select removable device priority. Just like floppy, LS120, ZIP-100, USB-FDD and USB-ZIP.  
Hard Disk Boot Priority  
Select hard disk boot priority.  
CD-ROM Boot Priority  
Select CD-ROM boot priority.  
First /Second/Third Boot Device  
Select the order in which devices will be searched in order to find a boot device.  
Options: Removable (default for first boot device)Hard Disk (default for third boot device)、  
CDROM (default for second boot device)Disabled  
Boot Other Device  
The setting allows the system to try to boot from other devices if the system fails to boot from the  
1st/ 2nd/ 3rd boot devices. Options: Enabled (default)Disabled  
26  
 
 
PX875P PRO/ PX875P  
Advanced BIOS Features  
CPU L1 & L2 Cache  
Make CPU internal cache active or inactive. System performance may degrade if you disable this  
item. Options: Enabled (default)Disable.  
Hyper-Threading Technology  
When you install a CPU include Hyper-Threading Technolong. And this item will allow you to  
enable or disabled the Hyper-Threading technology. Options: Disabled (default)Enabled  
Quick Power On Self Test  
Allows the system to skip certain tests while booting. This will speed up the boot process.  
Options: Enabled (default)Disabled.  
Boot Up NumLock Status  
Selects the power on state for NumLock.  
Options: On (default)  
Off  
Numpad keys are number keys.  
Numpad keys are arrow keys.  
Typematic Rate Setting  
When “Enabled”, the “typematic rate” and “typematic delay” can be configured. Typematic Rate  
determines the keystroke repeat rate used by the keyboard controller..  
Options: Disabled (default)Enabled  
Typematic Rate (Chars/Sec)  
The rate at which a character repeats when you hold down a key.  
Options: 6 (default)8101215202430  
Typematic Delay (Msec)  
The delay before keystrokes begin to repeat. Options: 250 (default)5007501000  
APIC Mode  
By enabling this option, “MPS version control for OS” can be configured.  
Options: DisabledEnabled (default)  
27  
 
PX875P PRO/ PX875P  
MPS Version Control For OS  
The 1.1 version is the older version that supports 8 more IRQs in the Windows NT environment.  
Choose the new 1.4 version for Windows 2000 and Windows XP. Options: 1.4 (default)1.1  
OS Select For DRAM > 64MB  
Select “OS2” only if you are running the OS/2 operating system with greater than 64MB of RAM.  
Options: Non-OS2 (default)OS2  
HDD S.M.A.R.T. Capability  
Self Monitoring Analysis and Reporting Technology is a technology that enables a PC to attempt to  
predict the possible failure of storage drives. Options: Disabled (default)Enabled  
Intel OSB Logo Show  
This item allows you to show or hide the small LOGO EPA.  
Options: Disabled (default)Enabled  
Advanced Chipset Features  
DRAM Timing Selectable  
This item determines DRAM clock/ timing using SPD or manual configuration.  
Make sure your memory module has SPD (Serial Presence Data), if you want to select the “By SPD”  
option. Options: ManualBy SPD (default)  
CAS Latency Time  
This item determines CAS Latency. When synchronous DRAM is installed, the number of clock  
cycles of CAS latency depends on the DRAM timing. Do not reset this field from the default value  
specified by the system engineer. This field is adjustable only when “DRAM Timing Selectable” is  
set to “Manual”. This field is locked when “DRAM Timing Selectable” is set to “By SPD” and is  
automatically determined by the system. Options: 22.53  
Active to Precharge Delay  
This item allows you to select DRAM Active to Precharge Delay. This field is locked when “DRAM  
Timing Selectable” is set to “By SPD” and is automatically determined by the system.  
Options: 8765  
28  
 
PX875P PRO/ PX875P  
DRAM RAS# to CAS# Delay  
This item allows you to select a delay time between the CAS and RAS strobe signals. It only applies  
when DRAM is written to, read from, or refreshed. This field is adjustable only when “DRAM  
Timing Selectable” is set to “manual”. This field is locked when “DRAM Timing Selectable” is set to  
“By SPD” and is automatically determined by the system. Options: 432  
DRAM RAS# Precharge  
This item allows you to select the DRAM RAS# precharge time. The ROW address strobe must  
precharge again before DRAM is refreshed. An inadequate configuration may result in incomplete  
data. This field is adjustable only when “DRAM Timing Selectable” is set to “manual”. This field is  
locked when “DRAM Timing Selectable” is set to “By SPD” and is automatically determined by the  
system. Options: 432  
System BIOS Cacheable  
When enabled, accesses to system BIOS ROM addressed at F0000H-FFFFFH are cached, provided  
that the cache controller is enabled. Options: Enabled (default), Disabled  
Video BIOS Cacheable  
Select “Enabled” to allow caching of the video BIOS which may improve performance. If any other  
program writes to this memory area, a system error may result. Options: Enabled, Disabled (default)  
Memory Hole at 15M-16M  
When enabled, you can reserve an area of system memory for ISA adapter ROM. When this area is  
reserved, it cannot be cached. Refer to the user documentation of the peripheral you are installing for  
more information. Options: Disabled (default)Enabled  
AGP Aperture Size (MB)  
Select the size of the AGP (Accelerated Graphic Port) aperture. The aperture is a portion of the PCI  
memory address range dedicated for graphic memory address space. Host cycles that hit the aperture  
range are forwarded to the AGP without any translation.  
Options: 48163264128 (default)256  
DRAM Data Integrity Mode  
If you install the unbuffered/ non-ECC memory DIMMs, this item will auto detect the Non-ECC  
DRAM mode. If you install the unbufferec/ with-ECC memory DIMMs, this item allows you to  
select the DRAM mode.  
Options: Non-ECC (default)With-ECC  
29  
 
PX875P PRO/ PX875P  
P.A.T. Mode  
Allows user to enable “Performance Acceleration Technology” in FSB800/ DDR400 mode, using  
PAT can employ a specially configured “shortcut” or “by pass” when accessing memory, slicing  
several clock cycles from the access times and reducing conventional latency factors. Preliminary  
tests have shown that system performance and efficiency can be increased about 3% - 5%.  
If you want to set the “Turbo” or the “Ultra” options, please make sure your memory DIMMs can be  
overclock. Overclocking can damage the memory DIMMs or other sensitive components.  
Options: Auto (default)Compatible (Slowest)PAT-DisabledTurboUltra (Fastest)  
PnP/PCI Configurations  
Reset Configuration Data  
Select “Enabled” to reset the Extended System Configuration Data (ESCD) if you have installed a  
new add-on card and the system reconfiguration has caused such a serious conflict that the OS cannot  
boot. Options: Disabled (default)Enabled  
Resources Controlled By  
BIOS can automatically configure all the boot and Plug and Play compatible devices. If you choose  
Auto, you will not be able to manually assign IRQ DMA and memory base address fields, since  
BIOS automatically assigns them. Options: Auto (ESCD) (default)Manual  
IRQ Resources  
When resources are controlled manually, you can assign each system interrupt a type, depending on  
the type of device using the interrupt. This is only configurable when “Resources Controlled By” is  
set to “Manual”.  
Options: IRQ-3/ 4/ 5/ 7/ 9/ 10/ 11/ 12/ 14/ 15  
assigned to  
PCI device  
PCI / VGA Palette Snoop  
Some graphic controllers that are not VGA compatible take the output from a VGA controller and  
map it to their display as a way to provide boot information and VGA compatibility.  
Options: Disabled (default)Enabled  
PCI Latency Timer (CLK)  
This item allows you to set up the PCI Latency Time (0-255). If you select the “32” it will optimize  
PCI speeds. Options: 0-25532 (default)  
PCI SLOT1- 5  
This item allows you to select an IRQ address for PCI slot 1-5.  
Options: Auto (default)345791011121415  
30  
 
PX875P PRO/ PX875P  
Frequency/Voltage Control  
CPU Host Frequency (MHz)  
This item displays the CPU Host frequency . You can set it from XXX to 550 (or 255). The default  
depends on your CPU frequency. The default for this field depends on the CPU installed.  
CPU Clock Ratio 8X  
When you enable this field, the CPU clock ratio is fixed at “8X” and overrides the entry for the “CPU  
Clock Ratio” field (see “CPU Clock Ratio” field). The CPU clock ratio is used, in part, to determine  
the CPU clock speed (CPU clock speed = CPU clock ratio * CPU Host Frequency). It has been  
shown that a higher “CPU Host Frequency” and a lower “CPU Clock Ratio” is more desirable when  
calculating a desired CPU clock speed. This field allows you to set the CPU clock ratio to a lower  
than usual value (8X), allowing you to use higher “CPU Host Frequency” values.  
When you disable this field, the CPU clock ratio will be determined by the “CPU Clock Ratio” field.  
This item will only appear when the CPU clock ratio is not locked by the CPU manufacturer.  
Options: Enabled, Disabled (default)  
CPU Clock Ratio  
This field will only display if the CPU has not been set to a locked state by the CPU manufactory. If  
your CPU is locked, you will not be able to adjust the “CPU Clock Ratio”. The default depends on  
your CPU.  
CPU Speed Detected  
This item display the currect CPU speed.  
CPU Speed Setting  
This item display the CPU speed that you setting for. If you don’t change the “CPU Host Frequency”  
or the “CPU Clock Ratio” and the item will display the current CPU speed.  
DDR:CPU Ratio  
This item allows you to adjust your “DRAM:CPU Clock Ratio” and overclock the DDR speeds of  
the system. The options that are available for this item will depend on the factory default setting for  
the “CPU Host Frequency” BIOS field according to the table below.  
31  
 
PX875P PRO/ PX875P  
Available Options  
Factory Default  
CPU Host Frequency  
2.66X2.50X (Debug)  
100  
Default (default)2.00X2.50X、  
1.33X (Debug)1.60X (Debug)  
133  
Default (default)1.33X1.60X、  
2.00X2.50X (Turbo)  
200  
DDR Speed  
This item displays the current DDR memory speed.  
Spread Spectrum  
The Spread Spectrum function can reduce the EMI (Electromagnetic Interference) generated. Options:  
Enabled (default)Disabled  
AGP/PCI/SRC Speed Setting  
This item determines the AGP, PCI and SRC frequencies (speed settings). You can set these  
frequencies using the supplied BIOS options. One of the options available to you is “Auto, Auto,  
Auto”. Using the “Auto, Auto, Auto” option will instruct the system to automatically calculate these  
frequencies based on the factory default “CPU Host Frequency” setting, the current “CPU Host  
Frequency” setting and the formulas in the table below. Note that the factory default “CPU Host  
Frequency” is the value of the “CPU Host Frequency” when you first received your system.  
Factory Default  
“CPU Host  
Frequency”  
Formulas  
AGP frequency  
PCI frequency  
SRC frequency  
AGP frequency  
PCI frequency  
SRC frequency  
AGP frequency  
PCI frequency  
SRC frequency  
= current CPU Host Frequency / 1.5  
= current CPU Host Frequency / 3  
= current CPU Host Frequency / 1  
= current CPU Host Frequency / 2  
= current CPU Host Frequency / 4  
= current CPU Host Frequency / 1.33  
= current CPU Host Frequency / 3  
= current CPU Host Frequency / 6  
= current CPU Host Frequency / 2  
100  
133  
200  
To determine your new frequencies, you must first take the factory default “CPU Host Frequency”  
and then determine the corresponding formulas according to the table above. Second, take the current  
“CPU Host Frequency” setting and apply it to the formulas to arrive at your new frequencies.  
For example, if your factory default “CPU Host Frequency” was 100, and you reset the “CPU Host  
Frequency” to 133, your AGP, PCI and SRC frequencies will be as follows:  
32  
 
PX875P PRO/ PX875P  
AGP Frequency = 133 / 1.5 = 88.67  
PCI Frequency = 133 / 3  
SRC Frequency = 133 / 1  
= 44.33  
= 133.0  
AGP Frequency  
This item displays the current AGP frequency.  
PCI Frequency  
This item displays the current PCI frequency.  
SRC Frequency  
This item displays the current SRC Frequency.  
Default CPU Voltage (Volt)  
This item displays the CPU default Voltage.  
CPU Voltage (Volt)  
This item allows you to adjust your CPU core voltage.  
Options: Default (default)Default + 0.3VDefault + 0.2VDefault + 0.1V  
AGP Voltage (Volt)  
This item allows you to adjust the AGP Voltage.  
Options: Default (default)Default + 0.1V  
DDR Voltage (Volt)  
This item allows you to adjust the RAM voltage.  
Options: Default (default)Default + 0.3VDefault + 0.2VDefault + 0.1V  
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Integrated Peripherals  
Init Display First  
With systems that have multiple video cards, this option determines whether the primary display uses  
a PCI slot or an AGP slot. Options: AGP (default)PCI Slot  
OnChip IDE Device  
IDE HDD Block Mode  
Block mode is otherwise known as block transfer, multiple commands, or multiple sector read/write.  
Select the “Enabled” option if your IDE hard drive supports block mode (most new drives do). The  
system will automatically determine the optimal number of blocks to read and write per sector.  
Options: Enabled (default)Disabled  
On-Chip Primary/Secondary PCI IDE  
The mainboard chipset contains a PCI IDE interface with support for two IDE channels. Select  
“Enabled” to activate the first and/or second IDE interface. Select “Disabled” to deactivate the  
interface if you are going to install a primary and/or secondary add-in IDE interface. Options:  
Enabled (default)Disabled  
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IDE Primary/Secondary/Master/Slave PIO  
The IDE PIO (Programmed Input / Output) fields let you set a PIO mode (0-4) for each of the IDE  
devices that the onboard IDE interface supports. Modes 0 to 4 will increase performance  
incrementally. In Auto mode, the system automatically determines the best mode for each device.  
Options: Auto (default)Mode0Mode1Mode2Mode3Mode4.  
IDE Primary / Secondary /Master / Slave UDMA  
Ultra DMA 100 functionality can be implemented if it is supported by the IDE hard drives in your  
system. As well, your operating environment requires a DMA driver (Windows 95 OSR2 or a third  
party IDE bus master driver). If your hard drive and your system software both support Ultra DMA  
100, select “Auto” to enable BIOS support. Options: Auto (default)Disabled  
***OnChip Serial ATA Setting***  
On-Chip Serial ATA  
This field allows you to select the on-chip Serial ATA operating mode which will determine how you  
will use your Serial ATA drives with the other standard IDE drives. This system can physically  
attach 4 IDE drives and 2 SATA drives but will have certain limitations as described below.  
OptionsDisabled  
Auto (default)  
Disable on-chip serial ATA. No Serial ATA devices installed.  
BIOS will auto-detect the presence of any SATA devices.  
Note: When using the “Auto” mode with Windows®  
98/ME/2000 and installing drives on all 4 IDE connectors and  
both SATA drives, the system will only recognize 2 of the IDE  
drives along with the 2 SATA drives (this will be similar to the  
“Combined” Mode – see below).  
Combined Mode  
Windows® 98/ME/2000 can recognize IDE devices but cannot  
directly recognize an SATA device and therefore you must use  
this mode to allow the SATA device to simulate an IDE device  
by assuming the role of one of the two IDE channels in the  
system. This means that you will only have one available IDE  
channel left, leaving you with a total of 2 IDE drives and 2  
SATA drives for use (each IDE channel can support 2 IDE  
drives). If you were to install all four IDE drives and both  
SATA drives, you will only see 2 of the IDE drives along with  
the 2 SATA drives.  
Enhanced Mode  
SATA Only  
In this mode, you can use all 6 hard disk drives (including 4  
IDE drives and 2 SATA drives).  
Note: You cannot use “Enhanced” mode with Windows®  
98/ME/2000. It only support to install Windows® XP if you  
want to boot from SATA device. (It’s restriction from Intel.)  
Select this option when you install SATA drives only.  
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Serial ATA Port0/ 1 Mode  
This field determines the operating mode of the SATA ports. The options are determined by the  
“On-Chip Serial ATA” field.  
On-Chip Serial ATA – Combined Mode:  
When you set the “On-Chip Serial ATA” to “Combined Mode”, you must select one of the PATA  
channels to use with the SATA devices.  
Options: Primary Master, Primary Slave, Secondary Master, Secondary Slave  
On-Chip Serial ATA – Enhanced Mode:  
When you set the “On-Chip Serial ATA” to “Enhanced Mode”, you must determine which of the  
SATA devices will be the master SATA device. You configure this with the “Serial ATA Port 0  
Mode” field only.  
Options: SATA0 master, SATA1 master  
Onboard Device  
If you highlight the “INTEL OnChip PCI Device” label and then press the enter key, it will take you  
to a submenu with the following options:  
USB Controller  
This option should be enabled if your system has a USB port installed on the system board. You will  
need to disable this feature if you add a higher performance controller.  
Options: Enabled (default)Disabled  
USB 2.0 Controller  
This option should be enabled if your system has a USB 2.0 device installed on the system board.  
You will need to disable this feature if you install a USB 1.1 device.  
Options: Enabled (default)Disabled  
USB Keyboard Support  
Enables support for USB attached keyboards. Options: Auto (default)Enabled  
AC97 Audio  
This item allows you to control the onboard AC’97 audio. Options: Auto (default)Disabled  
Onboard LAN Device  
This item allows you to enable or disable the LAN Device. Options: Enabled (default)Disabled  
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PX875P PRO/ PX875P  
Onboard LAN Boot ROM  
Decide whether to invoke the boot ROM of the onboard LAN chip.  
Options: Disabled (default)Enabled  
Onboard I/O Chip Setup  
PWRON After PWR-Fail  
This field will determine whether your system will boot after restoring power after a power failure. If  
you select “On”, the system will boot whether or not the system was on before power failure. If you  
select “Former-Sts”, the system will be restored to the status before the power failure.  
Options: Off (default)OnFormer-Sts  
Power On Function  
This option allows you to select a way to power on your computer. Options: PasswordHot KEY、  
Mouse LeftMouse RightAny KEYBUTTON ONLY (default), and Keyboard 98  
KB Power On Password  
This it the password that your system will use as part of the power-on sequence. This field is only  
configurable when “Power On Function” is set to “Password”.  
Hot Key Power ON  
This option allows you to use the Ctrl key along with a hot key (function key) to power on your  
system. This field is only configurable when “Power On Function” is set to “Hot Key”.  
Options: Ctrl-F1Ctrl-F2…… Ctrl-F12  
Onboard FDC Controller  
Select “Enabled” if your system has a floppy disk controller (FDC) installed on the system board and  
you wish to use it. If you install an add-in FDC or the system has no floppy drive, select “Disabled”.  
Options: Enabled (default)Disabled  
Onboard Serial Port 1/ Port 2  
Select an address and corresponding interrupt for the first/ second serial port.  
Options: Disabled3F8/IRQ4 (default for port1)2F8/IRQ3(default for port2)3E8/IRQ4、  
2E8/IRQ3Auto  
UART Mode Select  
This item allows you to select the Infra Red (IR) standard to be used.  
Options: Normal (default)ASKIRIrDA  
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RxD, TxD Active  
This item determines the RxD and TxD frequencies. This field only configurable if “UART Mode  
Select” is set to “ASKIR” or “IrDA”. Options: Hi / Lo (default)Hi / HiLo / HiLo / Lo  
IR Transmission Delay  
This item allows you to enable/disable IR transmission delay. This field only configurable if “UART  
Mode Select” is set to “ASKIR” or “IrDA”. Options: Enabled (default)Disabled  
UR2 Duplex Mode  
Select the transmission mode used by the IR interface. Full-duplex mode permits simultaneous  
bi-directional transmission. Half-duplex mode permits transmission in only one direction at a time.  
This field only configurable if “UART Mode Select” is set to “ASKIR” or “IrDA”.  
Options: Half (default)Full  
Use IR Pins  
Consult your IR peripheral documentation to select the correct setting of the TxD and RxD signals.  
This field is only configurable if “UART Mode Select” is set to “ASKIR” or “IrDA”.  
Options: FullHalf (default)  
Onboard Parallel Port  
Select an address and corresponding interrupt for the onboard parallel port.  
Options: 378/IRQ7 (default)278/IRQ53BC/IRQ7Disabled  
Parallel Port Mode  
This option allows you to select a parallel port mode for the onboard parallel port.  
Options: ECP(default)  
Extended Capabilities Port.  
Enhanced Parallel Port.  
Standard Printer Port.  
ECP & EPP mode.  
EPP  
SPP  
ECP+EPP  
Normal  
EPP Mode Select  
Select EPP port type 1.7 or 1.9. This field is only configurable if “Parallel Port Mode” is set to “EPP”  
or “ECP+EPP”. Options: EPP 1.9(default)EPP 1.7  
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ECP Mode Use DMA  
Select a DMA Channel for the parallel port when using the ECP mode. This field is only  
configurable if “Parallel Port Mode” is set to “ECP”. Options: 3 (default)1  
Game Port Address (only for V1.0)  
Game Port I/O Address. Options: 201 (default)209Disabled  
Midi Port Address (only for V1.0)  
Midi Port Base I/O Address. Options: 330300 (default)290Disabled  
Midi Port IRQ (only for V1.0)  
This determines the IRQ that the Midi Port will use. Options: 510 (default)  
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Power Management  
The Power Management Setup Menu allows you to configure your system to utilize energy  
conservation features as well as power-up/ power-down options.  
ACPI Suspend Type  
The item allows you to select the suspend type using the ACPI operating system.  
Options: S1 (POS) (default)  
S3 (STR)  
Power on Suspend  
Suspend to RAM  
POS and STR  
S1 & S3  
Run VGABIOS if S3 Resume  
Select whether you want to run VGABIOS when the system wakes up from the S3 suspend function.  
This field is not configurable if “ACPI Suspend Type” is set to “S1(POS)”.  
Options: Auto (default)YesNo  
Power Management  
There are three options of Power Management:  
1. Min. Saving  
Minimum power management  
Suspend Mode = 1hour  
HDD Power Down = 15 minutes  
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2. Max. Saving  
Maximum power management (only available for sl CPUs).  
Suspend Mode = 1 minute  
HDD Power Down = 1 minute  
3. User Defined (default)  
Allows you to set each mode individually.  
When this option is enabled, each of the ranges are from 1 minute to 1 hour except for HDD Power  
Down, which ranges from 1 minute to 15 minute and includes a “disable” option.  
Note: If you select Min. or Max. Power Saving modes, the “HDD Power Down” value and the  
“Suspend Mode” value are both fixed.  
Video Off Method  
This option determines the manner in which the monitor goes blank.  
Options:  
V/H SYNC+Blank  
This selection will cause the system to turn off the vertical and horizontal  
synchronization ports and write blanks to the video buffer.  
Blank Screen(default) This option only writes blanks to the video buffer.  
DPMS Support Initial display power management signaling.  
Video Off In Suspend  
This determines whether power to the monitor is switched off when the computer is in suspend mode.  
Options: YesNo (default)  
Suspend Type  
This item allows you to select the suspend type under the ACPI operating system.  
Options: Stop Grant (default)PwrOn Suspend  
Modem Use IRQ  
This determines the modem’s IRQ. Options: 3 (default)45791011NA.  
Suspend Mode  
This item allows you to select the suspend time under the ACPI operating system.  
Options: Disabled(default)1Min2Min4Min8Min12Min20Min30Min40Min1Hour  
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HDD Power Down  
When enabled, the hard disk drive will power down after a certain configurable period of system  
inactivity. All other devices remain active.  
Options: Disabled (default)1 Min2 Min3 Min4 Min5 Min6 Min7 Min8 Min9 Min、  
10 Min11 Min12 Min13 Min14 Min15Min  
Soft-Off by PWRBTN  
In situations where the system enters a “hung” state, you can configure the BIOS so that you are  
required to pre the power button for more than 4 seconds before the system enters the Soft-Off state.  
Options: Delay 4 Sec, Instant-Off (default).  
Wake Up Control  
If you highlight the “Wake Up Control” label and then press the enter key, it will display a submenu  
with the following options:  
PCI PME Wake Up  
This option will also cause the system to wake up with any onboard LAN activity.  
Options: Disabled (default)Enabled  
Ring Wake Up  
This option allows you to awaken the system upon receiving an incoming call to modem device.  
Options: Disabled (default)Enabled.  
USB KB Wake-up From S3  
This item allows you to awaken the system from suspend mode using a USB keyboard.  
Options: EnabledDisabled (default)  
* This option is configurable only when the ACPI Suspend Type is set to S3.  
RTC Wake Up  
When “Enabled”, you can set the date and time at which the RTC (real-time clock) alarm awakens  
the system from Suspend mode. Options: EnabledDisabled (default).  
Date of Month Alarm  
You can choose which date of the month the system will boot up. This field is only configurable  
when “RTC Wake Up” is set to “Enabled”.  
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Time (hh: mm: ss) Alarm  
You can choose the hour, minute and second the system will boot up. This field is only configurable  
when “RTC Wake Up” is set to “Enabled”.  
**Reload Global Timer Events**  
When a system goes into suspend mode, certain devices must be inactive for a period of time.  
Conversely, if any of those devices have any activity, the system will awaken. You can select the  
devices that will participate in suspend/power-on activity by configuring these fields. Devices include:  
Primary IDE 0/ Primary IDE 1/ Secondary IDE 0/ Secondary IDE 1/ FDD,COM,LPT Port/ PCI PIRQ  
[A-D]#. Options: Disabled (default), Enabled  
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Hardware Monitor  
Case Open Warning  
If this function is set to “Enabled” and the case had been previously opened, the system will  
automatically display alert messages on the screen when you power on your computer. If this  
function is set to “Disabled”, the system will not show alert messages when you power on your  
computer even if the case had been previously opened.  
Options: Disabled (default)Enabled  
Smart CPUFAN Temperature  
This item allows you to choose the CPUFAN temperature. If the CPU temperature is lower then the  
CPUFAN temperature that you chosen and the CPUFAN will slowdown.  
Options: Disabled (default)30oC / 86oF35oC / 95oF40oC / 104oF  
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Load Defaults  
Load System Default Settings  
Load System Default Settings.  
Load System Turbo Settings  
Load System Turbo Settings.  
Load CMOS From BIOS  
Load defaults from flash ROM for systems without batteries.  
Save CMOS To BIOS  
Save defaults to flash ROM for systems without batteries.  
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Exit Menu  
Save & Exit Setup  
Save all configuration changes to CMOS (memory) and exit setup. A confirmation message will be  
displayed before proceeding.  
Exit Without Saving  
Abandon all changes made during the current session and exit setup. A confirmation message will be  
displayed before proceeding.  
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Chapter 3: Software Setup  
Software List  
Category  
Intel Chipset INF  
Platform  
Windows 9X /ME /2000 /XP  
3Com920 LAN Driver (for V1.0) Windows 9X /ME /2000 /XP  
Yukon V6.31 Lan Driver (for V2.0) Windows 9X /ME /2000 /XP  
Realtek Audio Driver  
Intel USB 2.0 Driver  
PC-Cillin 2002  
Windows 9X /ME /2000 /XP  
Windows 9X /ME  
Windows 9X /ME /2000 /XP  
Windows 9X /ME /2000 /XP  
Windows 9X /ME /2000 /XP  
DirectX 9.0  
Acrobat Reader  
Software Installation  
Place the Driver CD into the CD-ROM drive and the Installation Utility will auto-run. You can also  
launch the Driver CD Installation Utility manually by executing the Intel.exe program located on the  
Driver CD. (For more details, please refer to the Readme.txt files that in each folder of the Driver.)  
The screen and images are only for general reference. The version of the screens you  
received with your software may vary slightly.  
1. The first screen (Main Screen) will display several buttons. Choose by your mainboard model.  
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2. On the next screen, click the drivers that you  
want to install. (If you click the “Yukon V6.31 Lan  
Driver”, it will display the installation steps, please  
follow the description to complete the installation.)  
3. If you click the “Intel USB 2.0 Driver” from the  
screen in step 2, it will display the screen as left.  
(Please follow the description to complete the  
installation.)  
4. Back to the first page, click the “Tools” button  
and you can choose the software to install.  
NoteIf you click the “Browse CD” button from  
the screen in step 1, you can browse all the files in  
the Driver CD.  
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Chapter 4: Troubleshooting  
Problem 1:  
No power to the system. Power light does not illuminate. Fan inside power supply does not turn on.  
Indicator lights on keyboard are not lit.  
Causes:  
1. Power cable is unplugged.  
2. Defective power cable.  
3. Power supply failure.  
4. Faulty wall outlet; circuit breaker or fuse blown.  
Solutions:  
1. Make sure power cable is securely plugged in.  
2. Replace cable.  
3.Contact technical support.  
4.Use different socket, repair outlet, reset circuit breaker or replace fuse.  
Problem 2:  
System inoperative. Keyboard lights are on, power indicator lights are lit, hard drive is active but  
system seems “hung”  
Causes: Memory DIMM is partially dislodged from the slot on the mainboard.  
Solutions:  
1. Power Down  
2. Using even pressure on both ends of the DIMM, press down firmly until the module snaps into  
place.  
Problem 3:  
System does not boot from the hard disk drive but can be booted from the CD-ROM drive.  
Causes:  
1. Connector between hard drive and system board unplugged.  
2. Damaged hard disk or disk controller.  
3. Hard disk directory or FAT is corrupted.  
Solutions:  
1. Check the cable running from the disk to the disk controller board. Make sure both ends are  
securely attached. Check the drive type in the standard CMOS setup.  
2. Contact technical support.  
3. Backing up the hard drive is extremely important. Make sure your periodically perform backups  
to avoid untimely disk crashes.  
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Problem 4:  
System only boots from the CD-ROM. The hard disk can be read and applications can be used but  
booting from the hard disk is impossible.  
Causes: Hard Disk boot sector has been corrupted.  
Solutions: Back up data and applications files. Reformat the hard drive. Re-install applications and  
data using backup disks.  
Problem 5:  
Error message reading “SECTOR NOT FOUND” displays and the system does not allow certain data  
to be accessed.  
Causes: There are many reasons for this such as virus intrusion or disk failure.  
Solutions: Back up any salvageable data. Then performs low level format, partition, and then a high  
level format the hard drive. Re-install all saved data when completed.  
Problem 6:  
Screen message says “Invalid Configuration” or “CMOS Failure.”  
Causes: Incorrect information entered into the BIOS setup program.  
Solutions: Review system’s equipment. Reconfigure the system.  
Problem 7:  
The Screen is blank.  
Causes: No power to monitor.  
Solutions: Check the power connectors to the monitor and to the system.  
Problem 8:  
Blank screen.  
Causes:  
1. Memory problem.  
2. Computer virus.  
Solutions:  
1. Reboot computer. Reinstall memory. Make sure that all memory modules are securely installed.  
2. Use anti-virus programs to detect and clean viruses.  
Problem 9:  
Screen goes blank periodically.  
Causes: Screen saver is enabled.  
Solutions: Disable screen saver.  
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Problem 10:  
Keyboard failure.  
Causes: Keyboard is disconnected.  
Solutions: Reconnect keyboard. Replace keyboard if you continue to experience problems.  
Problem 11:  
No color on screen.  
Causes:  
1. Faulty Monitor.  
2. CMOS incorrectly set up.  
Solutions:  
1. If possible, connect monitor to another system. If no color appears, replace monitor.  
2. Call technical support.  
Problem 12:  
The screen displays “C: drive failure.”  
Causes: Hard drive cable not connected properly.  
Solutions: Check hard drive cable.  
Problem 13:  
Cannot boot the system after installing a second hard drive.  
Causes:  
1. Master/slave jumpers not set correctly.  
2. Hard drives are not compatible / different manufacturers.  
Solutions:  
1. Set master/slave jumpers correctly.  
2.Run SETUP program and select the correct drive types. Call drive manufacturers for possible  
compatibility problems with other drives.  
Problem 14:  
Missing operating system on hard drive.  
Causes: CMOS setup has been changed.  
Solutions: Run setup and select the correct drive type.  
Problem 15:  
Certain keys do not function.  
Causes: Keys jammed or defective.  
Solutions: Replace keyboard.  
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Appendix I: Over Clocking  
Important  
Before you attempt to overclock your system, we strongly recommend that you obtain a thorough  
understanding of all of the variables, procedures, and the potential risks associated with overclocking.  
Because we cannot control of all of the possible variables that exist (i.e. memory, AGP card, user  
configurations, cooling apparatus etc), we cannot assume responsibility from damage to any  
components of your system due to overclocking.  
What is overclocking?  
Overclocking is accelerating the processing speed of certain components of your system above and  
beyond what those components were rated for. With this mainboard, depending on the model, you  
may be able to overclock some or all of the following:  
CPU Speed  
FSB (Front Side Bus) frequency  
DDR (Memory) frequency  
AGP (Accelerated Graphics Port) frequency  
PCI (Peripheral Connect Interface) frequency  
SRC (Serial Reference Clock) frequency  
How to calculate your new frequencies.  
With this mainboard, the frequencies mentioned above are calculated using individual formulas.  
These formulas have a single “CPU Host Frequency” in common. For each of the items above there  
is also a multiplier or a divisor that is applied to the “CPU Host Frequency” to determine the final  
frequency for each component as shown in the following formulas.  
CPU Speed  
=
=
=
=
=
=
CPU Host Frequency  
CPU Host Frequency  
CPU Host Frequency  
CPU Host Frequency  
CPU Host Frequency  
CPU Host Frequency  
*
*
*
/
CPU Clock Ratio  
FSB multiplier  
DDR:CPU Ratio  
AGP divisor  
FSB frequency  
DDR frequency  
AGP frequency  
PCI frequency  
SRC frequency  
/
PCI divisor  
/
SRC divisor  
Configuring your system for overclocking is simply understanding the formulas above and going into  
the BIOS Setup Utility and changing “DDR:CPU Ratio”, “CPU Clock Ratio” and “CPU Host  
Frequency”.  
Note that the FSB multiplier for Intel based mainboards will always be fixed at 4. The AGP, PCI and  
SRC frequencies are all determined by the BIOS setting AGP/ PCI/ SRC Speed Setting.  
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How to configure your new frequencies.  
As mentioned you must enter the BIOS Setup Utility in order to begin configuring overclocking  
parameters. After you reboot your system, press the “Del” key when prompted to enter the BIOS  
Setup Utility. The parameters for overclocking will be found in the “Advanced” screen as part of the  
“Frequency/Voltage Control” section.  
BIOS Setup Utility Overclocking Variables  
The following items are all variables in the BIOS Setup Utility that are related to overclock  
configurations. See the BIOS section for additional information about these fields including available  
options.  
CPU Clock Ratio  
The CPU Clock Ratio is used to determine the CPU Speed. The CPU Clock Ratio may be locked by  
the CPU manufacturer. In this case the value will be displayed but will not be configurable.  
CPU Host Frequency (MHz)  
This field represents the CPU Clock that is used by all of the previously described formulas to arrive  
at the individual frequencies (CPU Speed, FSB, DDR, AGP, PCI, SRC).  
DDR:CPU Ratio  
This field is used to calculate DDR frequency. To calculate the DDR frequency, simply take the  
“CPU Host Frequency” and multiply it by this number.  
CPU Voltage/ AGP Voltage/ DDR Voltage  
As you increase the frequency of your components, the voltages may not be sufficient to support the  
faster speeds and you may begin to encounter problems. When you increase voltages it is important  
to remember that you will be increasing the heat generated by the chipsets which could result in  
damage. So it is recommended that you slowly increase these values in the increments provided by  
the BIOS Setup Utility. The CPU, AGP and DDR all have individual configurable voltage options.  
Spread Spectrum  
We recommend that you disable this function before you overclock your system.  
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AGP/PCI/SRC Speed Setting  
This item determines the AGP, PCI and SRC frequencies (speed settings). You can set these  
frequencies using the supplied BIOS options. One of the options available to you is “Auto, Auto,  
Auto”. Using the “Auto, Auto, Auto” option will instruct the system to automatically calculate these  
frequencies based on the factory default “CPU Host Frequency” setting, the current “CPU Host  
Frequency” setting and the formulas in the table below. Note that the factory default “CPU Host  
Frequency” is the value of the “CPU Host Frequency” when you first received your system.  
Factory Default  
“CPU Host  
Frequency”  
Formulas (using the “Auto, Auto, Auto option)  
AGP frequency  
PCI frequency  
SRC frequency  
AGP frequency  
PCI frequency  
SRC frequency  
AGP frequency  
PCI frequency  
SRC frequency  
= current CPU Host Frequency / 1.5  
= current CPU Host Frequency / 3  
= current CPU Host Frequency / 1  
= current CPU Host Frequency / 2  
= current CPU Host Frequency / 4  
= current CPU Host Frequency / 1.33  
= current CPU Host Frequency / 3  
= current CPU Host Frequency / 6  
= current CPU Host Frequency / 2  
100  
133  
200  
To determine your new frequencies, you must first take the factory default “CPU Host Frequency”  
and then determine the corresponding formulas according to the table above. Second, take the current  
“CPU Host Frequency” setting and apply it to the formulas to arrive at your new frequencies.  
* Your AGP, PCI or SRC devices may begin to malfunction because they are unable to handle  
certain speeds that are calculated using the “Auto,Auto,Auto” option, in which case you can fix the  
frequencies for these devices using the other available options for this field. And if you want to  
overcolock a system with SATA HDDs, we strongly to remind you to fix the AGP/PCI/SRC Speed to  
“66.68, 33.34, 100.02”.  
Configuration Suggestions  
Before attempting overclocking, you should write down all of the default BIOS settings for the  
variables described in the previous sections. This is so you can return to the original values if you run  
into problems.  
The next suggestion is to adjust in small steps and not to increase the options too fast. This is  
especially true with Voltage since increasing the voltage can significantly increase temperature. After  
adjusting the BIOS settings and rebooting your system, always check the CPU temperatures that are  
displayed in the BIOS Setup Utility (HW Section). Tolerable temperatures for your CPU will be  
listed with the specifications provided by your CPU manufacturer.  
Because increasing voltages is the biggest factor in increasing temperatures, you should only increase  
voltages as a last option when your system is continuing to experience problems. When you do  
increase the voltages, increase them only one increment at a time.  
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Testing  
Even though you have configured your overclocking options and have successfully booted to your  
operating system, it doesn’t mean that you have successfully overclocked your system. Testing is an  
equally important aspect of overclocking and you must stress your configurations thoroughly to  
ensure stability. It is better to discover that your system locks up during testing rather than  
experiencing the same while editing valuable information.  
There are several utility programs designed specifically for intensive hardware configuration testing  
such as 3Dmark2001SE and Winstone. With every configuration adjustment you should rerun your  
utilities. Testing is a time consuming procedure. Again, it is not within the scope of this document to  
discuss testing utilities in detail. You can find additional information on the Web.  
Cooling the components on your mainboard.  
Proper cooling is one the most important aspects of overclocking. Cooling refers to the cooling fans,  
heat sinks, and thermal material/grease that are used. When overclocking, it is highly recommended  
that you acquire a large powerful cooling fan with a heavy duty heat sink. Also make sure that you  
apply certified thermal material between the CPU and heatsink. It is also recommended that you  
make use of all of the fan attachments and make sure that cable clutter within the casing is kept to a  
minimum. It is beyond the scope of this document to explain cooling equipment in detail so we  
recommend that you consult the Web for more information. CPU manufacturers may also have a list  
of recommended, certified cooling equipment.  
The Watch Dog Timer  
Some mainboards come with a special feature called the Watch Dog Timer used to simplify the  
process of experimenting with overclocking. When you go too far with your overclocking  
configurations there is a chance that your system may become unstable and hang. Even after a reboot,  
the system may hang before you can even reach the BIOS Setup Utility to lower your settings. The  
usual procedure with most Mainboards is to open up your case and reset a CMOS jumper on the  
mainboard to restore the original default settings which can be a cumbersome activity when testing.  
The Watch Dog Timer however, will monitor the most recent boot information or POST (Power On  
Self Test) status to determine if the system booted successfully. If the last POST status was “not  
successful”, it will be assumed there were configuration problems and the system will automatically  
reset the BIOS configurations which will allow your system to boot again.  
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PX875P PRO/ PX875P  
Example:  
This example shows you how to overclock the CPU Internal Clock, DDR frequency  
and FSB frequency for an Intel based mainboard. Note that the options that are  
supplied with your version of the BIOS may vary slightly. The example is for  
reference only.  
Given:  
Mainboard:  
CPU:  
DDR:  
Intel based mainboard  
Pentium 4 (1.73 GHz, Fixed CPU Ratio = 13)  
DDR400 (PC3200) SDRAM  
CPU Speed  
FSB  
DDR Speed  
=
=
=
CPU Host Frequency * CPU Clock Ratio  
CPU Host Frequency * 4  
CPU Host Frequency * DDR:CPU Ratio  
AGP/PCI/SRC Speed Setting sets to “66.68, 33.34, 100.02”  
Before Overclocking:  
CPU Ratio (Fixed)  
= 13  
CPU Host Frequency  
DDR:CPU Ratio  
= 133  
= 2.5  
AGP/PCI/SRC Speed Setting show = 66.68 MHz/ 33.34 MHz/ 100.02 MHz  
CPU Speed  
FSB  
= 133 * 13  
= 133 * 4  
= 1729 MHz  
= 532 MHz  
DDR Speeds  
= 133 * 2.5  
= 333 (DDR333)  
After Overclocking:  
CPU Ratio (fixed)  
= 13  
CPU Host Frequency  
DDR:CPU Ratio  
= 160  
= 2.5  
AGP/PCI/SRC Speed Setting  
= 66.68 MHz/ 33.34 MHz/ 100.02 MHz  
CPU Speed  
FSB  
= 160 * 13  
= 160 * 4  
= 2080 MHz  
= 640 MHz  
DDR Speeds  
= 160 * 2.5  
= 400 (DDR400)  
56  
 
PX875P PRO/ PX875P  
Appendix II: Super 5.1 Channel Setup  
1. After into the system, click the audio icon  
from the Windows screen.  
2. Click Speaker Configuration button, you can see the screen like the picture below.  
3. You can choice 2, 4 or 6 channels by your speakers.  
2 Channels  
4 Channels  
6 Channels  
Super 5.1 Channel Audio Effect  
This mainboard comes with an ALC655 Codec which supports high quality 5.1 Channel audio effects.  
With ALC655, you are able to use standard line-jacks for surround audio output without connecting  
to any auxiliary external modules. To use this function, you have to install the audio driver in the  
bonus Pack CD as well as an audio application supporting 5.1 Channel audio effects. See the audio  
Port Connectors in the Hardware Installation section for a description of the output connectors.  
Speaker Test  
Make sure the cable is firmly into the connector.  
1. Click the audio icon  
from the Windows screen.  
2. Click Speaker Test button, you can see the screen like the pictures below.  
3. Select the speaker which you want to test by clicking on it.  
2 Channels  
4 Channels  
6 Channels  
Subwoofer  
Front Right  
Front Left  
Rear Right  
Rear Left  
Center  
57  
 
 
PX875P PRO/ PX875P  
Appendix III: Installing a Windows® OS  
to the SATA HDD  
Please refer to the steps below to install a windows® OS to the SATA HDD  
1. Make sure that the “On-Chip Serial ATA” option is set to “ Combined Mode ” in the BIOS  
Setup Utility.  
BIOS Setup Utility -> Integrated Peripherals Æ OnChip IDE Device Æ On-Chip Serial  
ATA Æ “Combined Mode”  
2. Make sure that either the “Serial ATA Port0 Mode” or “Serial ATA Port1 Mode” option is  
set to “Primary Master” in the BIOS Setup Utility. Note that you need to set either Port0 or  
Port1 depending on which SATA drive you are installing the OS to.  
BIOS Setup Utility -> Integrated Peripherals Æ OnChip IDE Device Æ Serial ATA  
Port0/1 Mode Æ “Primary Master”  
3. Save all BIOS configurations and exit the BIOS setup utility.  
4. Place the Windows® 98/Me/2000/XP CD into the CD-ROM drive to begin the OS  
installation process. During the installation you will see that the SATA device has been  
assigned to the C: drive. Continue and complete the installation of the Windows® OS.  
5. If you are installing Windows® XP, you must now set theOn-Chip Serial ATAoption to  
AutoorEnhanced Modein the BIOS Setup Utility in order for all of the SATA and  
IDE devices to be visible.  
BIOS Setup Utility -> Integrated Peripherals Æ OnChip IDE Device Æ On-Chip Serial  
ATA Æ “Enhanced Mode” or “Auto”  
58  
 
 

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