VIA Technologies P4PA User manual

i
VIA Mainboard
User’s Manual
VIA P4PA - U &
VIA P4PA - UL
Version 1.0 - February 5th, 2002
P/N 99-51-010111

ii
Copyright
Copyright by VIATechnologies Inc. (“VIA”). No part of this manual may
be reproduced or transmitted in any form without express written
authorization from VIA.
Trademarks
All trademarks are the property of their respective holders.
Data protection
All data should be backed-up prior to the installation of any drive unit or
storage peripheral. VIA will not be responsible for any loss of data resulting
from the use, disuse or misuse of this or any other VIA product.
No Warranty
VIA has made every effort to ensure the accuracy of the content of this
manual. However, it is possible that it may contain technical inaccuracies or
typographical or other errors. VIA will assume no liability for any
inaccuracy found in this publication, nor for damages, direct, indirect,
incidental, consequential or otherwise, that may result from such an
inaccuracy, including without limitation loss of data or profits.
VIA provides this manual “as is”, and does not issue a warranty of any
kind, express or implied, including without limitation implied warranties of
merchantability or fitness for a particular purpose.
The information provided in this manual is subject to change without
notice. VIA reserves the right to alter product designs, layouts or drivers
without notification.

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FCC-B Radio Frequency Interference Statement
This equipment has been tested and found to comply with the limits for a class
B digital device, pursuant to part 15 of the FCC rules. These limits are designed
to provide reasonable protection against harmful interference when the equip-
ment is operated in a commercial environment. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in accor-
dance with the instruction manual, 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.
Notice 1
The changes or modifications not expressly approved by the party respon-
sible for compliance could void the user’s authority to operate the equipment.
Notice 2
Shielded interface cables and A.C. power cord, if any, must be used in order to
comply with the emission limits.

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TRADEMARKS
All trademarks used in this manual are the property of their respective owners.
Intel and Pentium are registered trademarks of Intel Corporation.
PS/2 and OS/2 are registered trademarks of IBM Corporation.
Windows 95/98/98SE/2000 and Windows NT are registered trademarks of
Microsoft.
Netware is a registered trademark of Novell.
Award is a registered trademark of Award Software Inc.
NOTE
1. Always read the safety instructions carefully.
2. Keep this User’s Manual for future reference.
3. Keep this equipment away from humidity.
4. Lay this equipment on a reliable flat surface before setting it up.
5. The openings on the enclosure are for air convection and protect the
equipment from overheating. DO NOT COVER THE OPENINGS.
6. Make sure the voltage of the power source and adjust properly 110/220V
before connecting the equipment to the power inlet.
7. Place the power cord such a way that people cannot step on it. Do not
place anything over the power cord.
8. Always Unplug the Power Cord before inserting any add-on card or module.
9. All cautions and warnings on the equipment should be noted.
10. Never pour any liquid into the opening. Doing so could cause damage or
electrical shock.
11. If any of the following situations arises, get the equipment checked by a
service personnel:
* The power cord or plug is damaged
* Liquid has penetrated into the equipment
* The equipment has been exposed to moisture
* The equipment does not work well or does not work according to
the User’s Manual.
* The equipment has dropped or damaged
* The equipment has been visably damaged
12. DO NOT LEAVE THIS EQUIPMENT IN AN ENVIRONMENTUNCONDI-
TIONED, STORAGE TEMPERATURE ABOVE 600 C (1400F), IT MAY
DAMAGE THE EQUIPMENT.

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Box Contents
•1 x VIA Mainboard
•1 x User’s manual
• 1 x Quick Installation Guide
•1 x Floppy ribbon cable
•1 x ATA-66/100/133 Hard drive ribbon cable
•1 x 2 Port USB 2.0/1.1 Module
•1 x Driver Utilities CD
•1 x I/O Bracket

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Contents
Chapter 1. Specifications ..................... 1-1
Mainboard Specifications .................................................. 1-2
Mainboard Layout ............................................................ 1-4
Connectors Guide ............................................................. 1-5
Chapter 2. Installation.......................... 2-1
CPU Installation ................................................................ 2-2
CPU Installation ............................................................... 2-2
CPU Core Speed .............................................................. 2-3
CPU Fan Installation ........................................................ 2-3
Memory Installation ........................................................... 2-5
DDR Module Installation .................................................. 2-6
Power Supply ................................................................... 2-7
ATX 20-Pin Power Connector: ATXPWR ....................... 2-7
ATX 12V Power Connector: AUX12V............................ 2-7
Back Panel ....................................................................... 2-8
Mouse Connector: JMS1 .................................................. 2-8
Keyboard Connector: JKB1 ............................................. 2-8
USB Port Connectors....................................................... 2-9
Parallel Port Connector: LPT1 ......................................... 2-9
Serial Port Connectors: COM 1 & COM 2.................... 2-10
MIDI/Game Connector .................................................. 2-10
Audio Port Connectors ................................................... 2-10
RJ45 NIC Port (optional) ............................................... 2-10
Connectors ..................................................................... 2-11
Floppy Disk Drive Connector: FDD ................................ 2-11
IrDA Infrared Module Connector: IR ............................. 2-11
Hard Disk Connectors: IDE1 & IDE2 ........................... 2-12
CD-In Connector: CD_IN ............................................. 2-13
Aux Line-In Connector: AUX_IN ................................. 2-13

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Modem-In Connector: Modem_IN ................................ 2-13
Fan Power Connectors: CPU/SYS/PWR FAN ............. 2-14
Case Connectors: F_PANEL ......................................... 2-14
Digital Audio Connector: SPDIF .................................... 2-16
PC Smart Card Reader: SCR_14P ................................ 2-16
USB pin-header: USB3/4 ............................................... 2-17
Wake-On LAN Connector: WOL .................................. 2-17
Jumpers .......................................................................... 2-18
Clear CMOS Jumper: CLEAR_CMOS ......................... 2-18
Slots ............................................................................... 2-19
AGP (Accelerated Graphics Port) Slot .......................... 2-19
PCI Slots ........................................................................ 2-19
CNR (Communication Network Riser) .......................... 2-19
PCI Interrupt Request Routing ....................................... 2-20
Chapter 3. BIOS Setup......................... 3-1
Entering Setup ................................................................... 3-2
Control Keys .................................................................... 3-2
Getting Help ...................................................................... 3-3
The Main Menu ................................................................ 3-4
Standard CMOS Features ................................................ 3-6
Advanced BIOS Features ................................................. 3-8
Advanced Chipset Features............................................. 3-11
Integrated Peripherals...................................................... 3-13
Power Management Setup .............................................. 3-17
PNP/PCI Configurations ................................................. 3-22
PC Health Status............................................................. 3-24
Frequency/Voltage Control .............................................. 3-25
Load Fail-Safe Defaults................................................... 3-28
Load Optimized Defaults ................................................. 3-29

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Set Supervisor/User Password ........................................ 3-30
Save & Exit Setup........................................................... 3-32
Exit Without Saving ......................................................... 3-33
Chapter 4. Software Setup ................... 4-1
VIAApollo P4X266A Chipset Drivers .............................. 4-2
VIAAudio Driver ............................................................ 4-12
Realtek Network Driver .................................................. 4-13
ITE Smart Guardian Installation ....................................... 4-20
ITE Smart Guardian User’s Manual ................................. 4-22

1-1
Specifications
Specifications
1
The VIA P4PA mainboard is based around the
VIA Apollo P4X266A chipset, which brings support
for high-performance DDR266 SDRAM to the Intel®
Pentium® 4 platform. VIA’s advanced V-Link controller
brings optimal system efficiency by effectively dou-
bling bandwidth between the chipset’s north and south
bridges. Designed for the latest 478-pin Pentium®4
processors, these ATX sized mainboards are the per-
fect choice for Pentium 4 based high- performance PCs,
servers and workstations.
This chapter includes the following sections:
Mainboard Specifications 1-2
Mainboard Layout 1-4
Connectors Guide 1-5

1-2
Chapter 1
CPU
•Supports Intel®Pentium®4 processors in the 478 pin package
•Supports 1.5GHz, 1.6GHz, 1.7GHz, 1.8GHz, 1.9GHz, 2GHz and upwards
Chipset
•VIAApollo P4X266Achipset (VT8753 & VT8233A)
- Supports Intel®Pentium®4 processors with 400MHz (100MHz QDR) CPU
Front Side Bus (FSB)
- AGP v2.0 compliant with 4x transfer mode
- High Bandwidth V-Link Client controller
- Integrated Hardware Sound Blaster/Direct Sound AC’97 audio
- Ultra DMA 66/100/133 master mode PCI EIDE controller
- ACPI 1.0B and APM 1.2 compliant
Main Memory
•3 x 184-pin DDR DIMM slots
•Supports up to 3GB of DDR266 SDRAM (PC2100/PC1600)
•Supports 2.5v DDR266 SDRAM
Slots
•1 x AGP (Accelerated Graphics Port) 4X slot
•6 x PCI 2.2 32-bit PCI bus slots (supports 3.3v/5v PCI bus interface)
•1 x CNR (Communication Network Riser) slot
Onboard IDE
•Integrated IDE controller provides IDE HDD/CD-ROM with PIO, Bus Mas-
ter and Ultra DMA 66/100/133 operation modes
•Can connect up to four IDE devices
Onboard Peripherals
•1 floppy port supports 1 x FDD (up to 2.88MB, Japan 3 Mode Floppy
Supported)
Mainboard Specifications

1-3
Specifications
•2 x serial ports (COM 1 + COM 2)
•1 x parallel port supports SPP/EPP/ECP mode
•2 x USB 2.0/1.1 ports (plus 1 pin-headers for up to 2 additional connections)
•1 x IrDA connector for SIR/CIR/ASKIR/HPSIR
•1 x MIDI/Game port
•1 x RJ45 NIC port (optional)
Audio
•S/W VIA VT1612A AC'97 Codec
BIOS
•Award Plug & Play BIOS
•Desktop Management Interface (DMI) function which records your
mainboard specifications
Dimension
•ATX Form Factor
•30.5cm x 22.5cm
Mounting
•6 mounting holes

1-4
Chapter 1
Mainboard Layout
VIA P4PA - U & VIA P4PA - UL Mainboard
Socket 478
Top: Mouse
Bottom: Keyboard
Top: RJ45 (optional)
Bottom: USB ports
Top: Parallel port
Bottom: COM 1/COM 2
Top: Game port
Bottom:
Line-Out
Line-In
Mic
AGP Slot
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
PCI Slot 5
PCI Slot 6
CNR
BIOS
BATT
FDD
IDE 1 IDE 2
USB 3/4
SCR_14P
SYSFAN
IR
CPUFAN
CD_IN
AUX_IN
Modem_IN
SPDIF
AUX12V
ATXPWR
F_PANEL
WOL
CLEAR_CMOS
PWRFAN

1-5
Specifications
Connectors Guide
ATXPWR ATX 20-pin power connector see p. 2-7
AUX12V ATX 12V power connector see p. 2-7
Connectors Function Reference
JMS1 Mouse connector see p. 2-8
JKB1 Keyboard connector see p. 2-8
USB Port Connectors Connecting to USB devices see p. 2-9
LPT1 Parallel port connector see p. 2-9
COM 1 & COM 2 Serial port connector see p. 2-10
MIDI/Game Connector Connecting to joystick or game pad see p. 2-10
Audio Port Connectors Line-Out/Line-In/Mic-In see p. 2-10
RJ45 NIC Port (optional) LAN port see p. 2-10
FDD Floppy disk drive connector see p. 2-11
IR IrDA Infrared Module connector see p. 2-11
IDE 1 & IDE 2 Hard disk connectors see p. 2-12
CD_IN CD-In connector see p. 2-13
AUX_IN AUX Line-In connector see p. 2-13
Modem_IN Modem-In connector see p. 2-13
CPUFAN/SYSFAN/PWRFAN Fan Power connectors see p. 2-14
F_PANEL Case connectors see p. 2-14
SPDIF Digital audio connector see p. 2-16
SCR_14P PC Smart Card Reader connector see p. 2-16
CLEAR_CMOS Clear CMOS jumper see p. 2-18
USB 3/4 USB pin-header see p. 2-17
AGP Slot Connecting to AGP card see p. 2-19
PCI Slots Connecting to PCI cards see p. 2-19
CNR Slot Connecting to CNR card see p. 2-19
WOL Wake-On LAN connector see p. 2-17

Installation
2-1
Installation
This chapter provides you with information
about hardware setup procedures. While installing
the mainboard, carefully hold the components and
closely follow the installation procedures. Some
components may be damaged if they are installed
incorrectly.
It is recommended to use a grounded wrist
strap before handling computer components. Static
electricity can damage some components.
This chapter contains the following sections:
CPU Installation 2-2
Memory Installation 2-5
Power Supply 2-7
Back Panel 2-8
Connectors 2-11
Jumpers 2-18
Slots 2-19
22
22
2

Chapter 2
2-2
CPU Installation
The VIA P4PA mainboard support the Intel®Pentium®4 processor in the 478
pin package (PGA478). When installing the CPU, ensure the CPU has a large-
size heatsink and a cooling fan attached on the top to prevent overheating. If
the heatsink and cooling fan are not included with the CPU, contact your
dealer to purchase and install them before turning on the computer.
CPU Installation
Overheating will cause serious damage to the CPU
and system. Ensure the cooling fan and heatsink work
properly to protect the CPU from overheating.
WARNING!
1. Pull the lever sideways away
from the socket. Then raise the
lever up to a 90-degree angle.
2. Look for the dot/cut edge. The
dot/cut edge should point to-
wards the lever pivot. The
CPU will only fit in the correct
orientation.
3. Hold the CPU down firmly,
then close the lever shut to
complete the installation.

Installation
2-3
CPU Fan Installation
As processor technology pushes to faster speeds and higher performance,
thermal management becomes increasingly important. To dissipate heat, you
MUST attach the CPU cooling fan and heatsink on top of the CPU. Follow the
instructions below to install the Heatsink/Fan:
CPU Core Speed
If CPU Clock = 100MHz
Core/Bus ratio = 18
then CPU core speed = CPU Clock x Core/Bus ratio
= 100MHz x 18
= 1.8GHz
2. Position the heatsink and fan onto the
retention mechanism.
1. Locate the CPU and its retention
mechanism on the mainboard.
Retention mechanism
Overclocking
This mainboard is designed to support overclocking. However,
please make sure your components are able to tolerate such abnor-
mal settings, before overclocking. Any attempt to operate beyond
product specifications is not recommended. We do not guarantee the
damages or risks caused by inadequate operation or operation beyond
WARNING!

Chapter 2
2-4
5. Connect the fan power cable from the mounted fan to the 3-pin fan power connector
on the mainboard.
3. Mount the fan on top of the heatsink. Press down the fan firmly until its four clips
become wedged in the holes of the retention mechanism.
4. Press the two levers down to secure the fan. Each lever can be pressed down in only
ONE direction.

Installation
2-5
The VIAP4PA mainboard provide 3 sockets for 184-pin, 2.5V DDR DIMM
with 6 memory banks. To operate properly, at least one DIMM module must
be installed.
You can install PC1600/PC2100 DDR SDRAM modules on the DDR DIMM
slots (DDR 1~3).
DDR (Double Data Rate) SDRAM is similar to conventional SDRAM, but
doubles the rate of transfer by transfering data twice per cycle. This is
achieved by transfering data on both the rising and falling edges of the
clock. Conventional SDRAM only uses the rising edge of the clock to
transfer data. Therefore, conventional SDRAM is called SDR (Single Data
Rate) SDRAM. DDR SDRAM uses 2.5 volts as opposed to 3.3 volts used in
SDR SDRAM, and requires 184-pin DIMM modules rather than 168-pin
DIMM modules used by SDR SDRAM. DDR SDRAM is also known as
SDRAM-II, DDR DRAM and DSDRAM (Double-Speed DRAM). Two types
of DDR are available currently: PC1600 & PC2100. PC1600 DDR SDRAM
running at 100MHz will produce about 1.6GB/s memory bandwidth. PC2100
running at 133MHz will produce 2.1GB/s memory bandwidth. High memory
bandwidth makes DDR an ideal solution for high performance PC,
workstations and servers.
Memory Installation
Socket 478
DDR DIMM Slots
(DDR 1~3)

Chapter 2
2-6
DDR Module Installation
You can install either single sided or double sided 184-pin DDR DIMM
modules into DDR DIMM, depending on your requirements. Differing from
SDR DIMM, DDR DIMMs have only one notch on the center of the module.
The number of pins on either side of the breaks are also different. The
memory modules will only fit if placed in the correct orientation.
You can install DDR SDRAM modules in any of the following combinations:
Slot M em ory M odule Total M emory
Slot 1
(Bank 0 & B ank 1)
64M B, 128M B,
256M B, 512M B, 1GB
64M B~1GB
Slot 2
(Bank 2 & B ank 3)
64M B, 128M B,
256M B, 512M B, 1GB
64M B~1GB
Slot 3
(Bank 4 & B ank 5)
64M B, 128M B,
256M B, 512M B, 1GB
64M B~1GB
M aximum System M emory Supported 64M B~3GB
1. The DDR DIMM module has only one notch on the center.
2. Insert the DDR module vertically into the DDR DIMM slot. Make sure the
notch is correctly aligned.
3. The plastic clips at sides of the DIMM slot will automatically close shut.
Notch

Installation
2-7
Power Supply
The VIA P4PA mainboard requires an ATX power supply for powering the
system. Before inserting the power supply connector, always make sure that
all components are installed properly to ensure that no damage will be
caused.
ATX 20-Pin Power Connector: ATXPWR
This connector is for the ATX power supply. To connect to the ATX power
supply, make sure the plugs of the power supply are inserted in the correct
orientation and the pins are properly aligned. Then, push down the plugs
firmly into the connector.
ATX 12V Power Connector: AUX12V
This 12V power connector is used to provide power to the CPU.
PIN SIGNAL
11 3.3V
12 -12V
13 GND
14 PS_ON
15 GND
16 GND
17 GND
18 -5V
19 5V
20 5V
PIN SIGNAL
1 3.3V
2 3.3V
3 GND
45V
5 GND
65V
7 GND
8 PW_OK
9 5V_SB
10 12V
ATXPWR Pin Definition
PIN SIGNAL
1 GND
2 GND
3 12V
4 12V
AUX12V Pin
Socket 478
AUX12V
ATXPWR
1
3
2
4
10
1
20
11