VIA P4PB 400 User Manual

VIA Mainboard

User’s Manual

VIA P4PB 400-L

VIA P4PB 400-FL

Version 1.0 - June 19th, 2002

P/N 99-51-010512

i

Copyright

Copyright by VIA Technologies 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.

ii

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 equip­ment is operated in a commercial environment. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in accor­dance 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 responsible
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.

iii

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/XP 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 ENVIRONMENT
UNCONDITIONED, STORAGE TEMPERATURE ABOVE 600 C (1400F), IT MAY
DAMAGE THE EQUIPMENT.

iv

Box Contents

• 1 x VIA Mainboard

• 1 x User’s Manual

• 1 x Quick Installation Guide

• 1 x Floppy Ribbon Cable

• 1x ATA-33/66/100/133 IDE Ribbon Cable

• 1 x 2-Port USB 2.0/1.1 Module

• 1 x 2-Port IEEE 1394 Module (P4PB 400-FL)

• 1 x Audio Bracket

• 1 x Driver Utilities CD

v

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 ...........................................................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

vi

Modem-In Connector: Modem_IN ................................ 2-13

Fan Power Connectors: CPU/SYS/PWR FAN ............. 2-14

Case Connectors: F_PANEL ......................................... 2-14

Audio Header Connector: Audio_Header ...................... 2-16

USB pin-header: USB3~6 .............................................. 2-17

Wake-On LAN Connector: WOL .................................. 2-17

Wake-On Ring Connector: WOR................................... 2-18

1394 pin-header(optional) .............................................. 2-18

PC Smart Card Reader: SCR......................................... 2-19

Jumpers .......................................................................... 2-20

Clear CMOS Jumper: CLEAR_CMOS ......................... 2-20

Audio Codec Auto Detect Jumper: OB_CODEC ......... 2-21

CPU FSB Setting Jumper Switch: SW1........................2-21

Slots ............................................................................... 2-22

AGP (Accelerated Graphics Port) Slot .......................... 2-22

PCI Slots ........................................................................ 2-22

CNR (Communication Network Riser) .......................... 2-22

PCI Interrupt Request Routing ....................................... 2-23

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 .............................................. 3-16

PNP/PCI Configurations ................................................. 3-21

PC Health Status............................................................. 3-23

vii

Frequency/Voltage Control ..............................................3-24

Load Fail-Safe Defaults ...................................................3-27

Load Optimized Defaults ................................................. 3-28

Set Supervisor/User Password ........................................ 3-29

Save & Exit Setup ........................................................... 3-31

Exit Without Saving .........................................................3-32

Chapter 4. Software Setup ................... 4-1

Utility Driver CD Content .................................................. 4-2

Getting Started .................................................................. 4-2

Running the Driver Utility CD .......................................... 4-2

CD Content ...................................................................... 4-2

viii

1

Specifications

Specifications

The VIA P4PB 400 mainboard is based around
the VIA Apollo P4X400 chipset, which brings support
for high-performance DDR SDRAM to the Intel
Pentium® 4 platform. VIA’s advanced 533 MB/s 8-bit
V-Link controller brings optimal system efficiency by
effectively doubling bandwidth between the chipset’s
north and south bridges. Designed for the latest 478­pin Pentium® 4 processors, these ATX sized mainboards
are the perfect 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

1-1

Chapter 1

Mainboard Specifications

CPU

• Supports Intel

in the 478 pin package

• Supports 1.5GHz, 1.6GHz, 1.7GHz, 1.8GHz, 1.9GHz, 2GHz, 2.2GHz and upwards

Chipset

• VIA Apollo P4X400 chipset (VT8754 & VT8235)

- Supports Intel® Pentium® 4 processors with 400MHz (100MHz QDR) and
533MHz (133MHz QDR) CPU Front Side Bus (FSB)

- AGP v2.0/3.0 compliant with 4X/8X (1.5V) transfer mode

- High Bandwidth 533 MB/s 8-bit 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 sockets

• Supports up to 3GB of 2.5v DDR400(limited)/333/266 SDRAM (PC3200/

PC2700/PC2100)

®

Pentium® 4 Willamette/Northwood and Celeron® processors

Slots

• 1 x AGP (Accelerated Graphics Port) 4X/8X slot(1.5V)

• 5 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 Master

and Ultra DMA 66/100/133 operation modes

• Can connect up to 2 channels for 4 IDE devices

1-2

Specifications

Onboard Peripherals

• 1 floppy port supports 2 x FDD

• 2 x serial ports (COM 1 + COM 2)

• 1 x SPP/EPP/ECP mode compliant parallel port

• 2 x USB 2.0 ports (plus 2 pin-headers for up to 4 USB 2.0 additional connections)

• 1 x IrDA connector for SIR/ASKIR/HPSIR

• 1 x MIDI/Game port

• 1 x Smart Card Reader connector

• 2 x IEEE 1394 connectors(Optional)

• 1 x RJ45 NIC port

Onboard Audio

• VIA VT1616 6 channel AC’97 CODEC

• 1 x Audio header connector for addtional audio bracket

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

1-3

Chapter 1

Socket478

400

Mainboard Layout

Top: Mouse

Bottom: Keyboard

Top:RJ45
Bottom: USB ports

Top: Parallel port

Bottom: COM1/COM2

Top: Game port

Bottom:

Line-Out

Line-In

Mic

Audio_Header

CD_IN

Modem_IN

AUX_IN

ATXPWR

AUX12V

BIOS

PWRFAN

SCR

SIR

CNR Slot

AGP Slot

PCI Slot 1

PCI Slot 2

PCI Slot 3

PCI Slot 4

PCI Slot 5

VIA P4PB 400 Mainboard

OB_Codec

WOR

WOL

CPUFan

SW1

(optional)

1394-1 1394-2

IDE 1

CLEAR_CMOS

USB5/6USB3/4

FDD

IDE 2

F-PANEL

SYSFan

1-4

Specifications

Connectors Guide

Connectors Function Reference

ATXPWR ATX 20-pin power connector See p. 2-7

AUX12V ATX 12V power connector See p. 2-7

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 connectors 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 LAN port See p. 2-10

FDD Floppy disk drive connector See p. 2-11

SIR 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
F_PANEL Case connectors See p. 2-14

Audio_Header Audio bracket connectors See p. 2-16

USB 3~6 USB pin-header connectors See p. 2-17

WOL Wake-On LAN connector See p. 2-17
WOR Wake-On Ring connector See p. 2-18

1394 Port Connectors 1394 pin-header See p. 2-18

SCR PC Smart Card Reader connector See p. 2-19

CLEAR_CMOS Clear CMOS jumper See p. 2-20

OB_CODEC Audio Codec Auto Detect jumper See p. 2-21

FSB Setting CPU FSB Setting See p. 2-21

AGP Slot Connecting to AGP card See p. 2-22
PCI Slots Connecting to PCI cards See p. 2-22
CNR Slot Connecting to CNR card See p. 2-22

Fan Power connectors See p. 2-14

1-5

22

2

22

Installation

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 2-20

Slots 2-22

2-1

Chapter 2

CPU Installation

The VIA P4PB 400 mainboard supports the Intel® Pentium® 4 Willamette/
Northwood and Celeron® processors 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

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 to­wards the lever pivot. The
CPU will only fit in the cor­rect orientation.

WARNING!

3. Hold the CPU down firmly,
then close the lever shut to
complete the 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.

2-2

Installation

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

Overclocking

This mainboard is designed to support overclocking. However,

WARNING!

please make sure your components are able to tolerate such abnor­mal 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 product specifications.

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:

1. Locate the CPU and its retention mecha­nism on the mainboard.

Retention mechanism

2. Position the heatsink and fan onto the re­tention mechanism.

2-3

Chapter 2

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.

5. Connect the fan power cable from the mounted fan to the 3-pin fan power connector on the
mainboard.

2-4

Installation

Memory Installation

The VIA P4PB 400 mainboard provides 3 sockets for 184-pin, 2.5V DDR
DIMM modules with 6 memory banks. To operate properly, at least one DIMM
module must be installed.
You can install PC1600/PC2100/PC2700/PC3200 DDR SDRAM modules on
the DDR DIMM sockets (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). Four types of DDR are available currently:
PC1600, PC2100, PC2700 & PC3200. 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. PC2700 running at
166MHz will produce 2.66GB/s memory bandwidth. PC3200 running at
200MHz will produce 3.13GB/s memory bandwidth. High memory band­width makes DDR an ideal solution for high performance PC, workstations
and servers.

Socket 478

400

DDR DIMM Sockets

(DDR 1~3)

2-5

Chapter 2

DDR Module Installation

You can install either single sided or double sided 184-pin DDR DIMM mod­ules into the DDR DIMM sockets, depending on your requirements. Differing
from SDR DIMM, DDR DIMM modules 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:

Socket M em ory M odule Total M em ory

Socket 1

(Bank 0 & Bank 1)

Socket 2

(Bank 2 & Bank 3)

Socket 3

(Bank 4 & Bank 5)

M aximum System M em ory Supported

1. The DDR DIMM module has only one notch on the center.

64M B, 128MB,

256M B, 512MB, 1GB

64M B, 128MB,

256M B, 512MB, 1GB

64M B, 128MB,

256M B, 512MB, 1GB

64M B~1G B

64M B~1G B

64M B~1G B

64M B~3G B

Notch

2. Insert the DDR module vertically into the DDR DIMM socket. Make sure

the notch is correctly aligned.

3. The plastic clips at sides of the DIMM socket will automatically close shut.

2-6

Installation

Power Supply

The VIA P4PB 400 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.

10

20

Socket 478

ATXPWR

AUX12V

1

24

13

11

400

ATX 12V Power Connector: AUX12V

This 12V power connector is used to provide power to the CPU.

ATXPWR Pin Definition

PIN SIGNAL

1 3.3V
2 3.3V
3 GND
4 5V
5 GND
6 5V
7 GND
8 PW_OK
9 5V_SB
10 12V

PIN SIGNAL

11 3.3V
12 -12V
13 GND
14 PS_ON
15 GND
16 GND
17 GND
18 -5V
19 5V
20 5V

2-7

AUX12V Pin

PIN SIGNAL

1 GND
2 GND
3 12V
4 12V

Chapter 2

Back Panel

The Back Panel provides the following connectors:

Mouse

Keyboard USB

RJ45

COM 1

Parallel

Mouse Connector: JMS1

The VIA P4PB 400 mainboard pro­vides a standard PS/2 mouse connec­tor for attaching a PS/2 mouse. You
can plug a PS/2 mouse directly into
this connector. The connector loca­tion and pin assignments are as
follows:

6

4

2

PS/2 Mouse (6-pin Female)

5

3

1

MIDI/Game

COM 2

L-out L-in

MIC

Keyboard Connector: JKB1

The mainboard provides a standard PS/
2 keyboard connector for attaching a
PS/2 keyboard. You can plug a PS/2
keyboard directly into this connector.

6

21

PS/2 Keyboard (6-pin Female)

5

34

Pin Definition

PIN SIGNAL DESCRIPTION

1 Mouse DATA Mouse DATA
2 NC No connection
3 GND Ground
4 VCC +5V

5. Mouse Clock Mouse clock

6. NC No connection

Pin Definition

PIN SIGNAL DESCRIPTION

1 Keyboard DATA Keyboard DATA
2 NC No connection
3 GND Ground
4 VCC +5V

5. Keyboard Clock Keyboard clock

6. NC No connection

2-8

Installation

USB Port Connectors

The VIA P4PB 400 mainboard provides 2 USB 2.0 ports (2 connectors for up
to 4 additional USB 2.0 ports). USB-compatible devices can be plugged di­rectly into these ports.

Pin Definition

PIN SIGNAL DESCRIPTION

1

1 2 3 4

5 6 7 8

USB Ports

2
3
4
5
6
7
8

VCC

-Data 0
+Data 0
GND
VCC

-Data 1
+Data 1
GND

+5V
Negative Data Channel 0
Positive Data Channel 0
Ground
+5V
Negative Data Channel 1
Positive Data Channel 1
Ground

Parallel Port Connector: LPT1

The mainboard provides a 25-pin female connector for LPT (parallel port). A
parallel port is a standard printer port that supports Enhanced Parallel Port
(EPP) and Extended Capabilities Parallel Port (ECP) modes.

13

Pin Definition

1

1425

PIN SIGNAL DESCRIPTION

1 STROBE Strobe
2 DATA0 Data0
3 DATA1 Data1
4 DATA2 Data2
5 DATA3 Data3
6 DATA4 Data4
7 DATA5 Data5
8 DATA6 Data6
9 DATA7 Data7
10 ACK# Acknowledge
11 BUSY Busy
12 PE Paper End
13 SELECT Select
14 AUTO FEED# Automatic Feed
15 ERR# Error
16 INIT# Initialize Printer
17 SLIN# Select In
18 GND Ground
19 GND Ground
20 GND Ground
21 GND Ground
22 GND Ground
23 GND Ground
24 GND Ground
25 GND Ground

2-9

Chapter 2

Serial Port Connectors: COM 1 & COM 2

The mainboard offers two 9-pin male Serial Port connectors (COM 1 and
COM 2) . You can attach a serial mouse or other serial devices directly to these
ports.

Pin Definition

1 2 3 4 5

6 7 8 9

9-Pin Male DIN Connectors

PIN SIGNAL DESCRIPTION

1

DCD

2

SIN

3

SOUT

4

DTR

5

GND

6

DSR

7

RTS

8

CTS

9

RI

Data Carry Detect

Serial In or Receive Data

Serial Out or Transmit D ata

Data Terminal Ready

Ground

Data Set Ready

Request To Send

Clear To Send

Ring Indicate

MIDI/Game Connector

You can connect a joystick or game pad
to this connector.

Audio Port Connectors

Line-Out is a connector for speakers

or headphones. The Line-In connector
can be used for an external CD player,
tape player, or other audio devices. The
Mic-In connector is for connecting mi­crophones.

Line Out

1/8” Stereo Audio Connectors

Line In MIC

RJ45 NIC Port

The mainboard provides one standard
RJ-45 port for connection to the Local
Area Network (LAN). You can connect
a network cable to the LAN port.

2-10

Installation

Connectors

The VIA P4PB 400 mainboard provides pin-header connectors for FDD, IDE
HDD, case, modem, LAN, USB Ports, IR module and the CPU/System FAN.

Floppy Disk Drive Connector: FDD

The standard floppy disk drive connector supports 360K, 720K, 1.2M, 1.44M,
and 2.88M floppy disk types.

Socket 478

400

FDD

IrDA Infrared Module Connector: SIR

These connectors allow you to connect IrDA Infrared module(s). You must
configure the setting through the BIOS setup to activate the SIR functions.

SIR Pin Definition

PIN SIGNAL

1

VCC

2

NC

3

IR R X

4

GND

5

IR T X

1

5

Socket 478

400

2-11

Chapter 2

Hard Disk Connectors: IDE1 & IDE2

The VIA P4PB 400 mainboard has a 32-bit Enhanced PCI IDE and Ultra
DMA 33/66/100/133 controller that provides PIO mode 0~4, Bus Master,
and Ultra DMA 33/66/100/133 functions. You can connect up to four hard
disk drive, CD-ROM, LS-120 and other devices. These connectors utilize the
provided IDE hard disk cable.

Socket 478

400

IDE 1

IDE 2

IDE1 (Primary IDE Connector)

The first hard drive should always be connected to IDE1. IDE1 can
connect a Master and a Slave drive. You must configure the second
hard drive to Slave mode by setting the jumper accordingly.

IDE2 (Secondary IDE Connector)

IDE2 can also connect a Master and a Slave drive.

TIP: If you install two hard disks on cable, you must
configure the second drive to Slave mode by setting its jumper.
Refer to the hard disk documentation supplied by hard disk

vendors for jumper setting instructions.

2-12

Installation

CD-In Connector: CD_IN

This connector is for the CD-ROM audio connector.

Aux Line-In Connector: AUX_IN

This connector is for a DVD add-on card with Line-in connector.

Modem-In Connector: Modem_IN

This connector is for a modem with internal audio connector.

Socket 478

CD_IN

CD_R

CD_GND

CD_L

Modem_IN

MONO_OUT

GND

PHONE_IN

400

AUX_R

AUX_L

AUX_IN

GND

2-13

Chapter 2

Fan Power Connectors: CPU/SYS/PWR FAN

The CPUFAN (CPU fan) , SYSFAN (chasis fan) , and PWRFAN (power fan)
run on +12V and maintain system cooling. When connecting the wire to the
connectors, always be aware that the red wire is the Positive and should be
connected to the +12V. The black wire is Ground and should be connected to
GND. Both CPU and chasis fan connectors have sensors to detect fan speed.

CPUFAN

SENSOR

+12V

GND

Socket 478

400

PWRFAN

SYSFAN

SENSOR

+12V

GND

GND
+12V
SENSOR

Note: Always consult the vendor for proper CPU cooling fan.

Case Connectors: F_PANEL

The case connector block F_PANEL allow you to connect to the Power Switch,
Reset Switch, Power LED, HDD LED and SLED on the case.

2-14

Installation

Socket 478

400

Pin Definition

PIN SIGNAL PIN SIGNAL

1
3
5
7

9
11
13
15

PWR_LED+
PWR_LED+

PWR_LED-

SPEAKER+

NC
NC

SPEAKER-

NC

2
4
6

8
10
12
14
16

1516

21

HD_LED+

HD_LED-

PW+

PW-

RESET+

RESET-

SLED+

SLED-

Power Switch

Connect to a 2-pin push button switch. Pressing this button will turn the sys­tem power on or off.

Reset Switch

The Reset Switch is used to reboot the system rather than turning the power
ON/OFF. Avoid rebooting while the HDD is working. You can connect the
Reset Switch from the system case to this pin.

Power LED

The LED is lit when the system is power on. If the system is in S1 (POS ­Power On Suspend) or S3 (STR - Suspend To RAM) state, the LED will
blink.

HDD LED

HDD LED shows the activity of a hard disk drive. Avoid turning the power off
while HDD LED is lit. Connect the HDD LED from the system case to this
pin.

SLED

The SLED is lit when the system is in the S1 (POS - Power On Suspend) state.

Speaker

The speaker from the system case is connected to this pin.

2-15

Chapter 2

Socket 478

400

Audio Header Connector: Audio_Header

This connector is for connecting the audio bracket that comes with VIA P4PB
400 mainboard. The audio bracket consists of two SPDIF connectors (one for
optical and the other RCA), one sub-woofer/center connector and one rear
speaker connector.

The SPDIF output provides digital audio to external speakers or compressed
AC3 data to an external Dolby Digital Decoder. The feature is available only
with stereo system which has digital output function.

Pin Definition

PIN SIGNAL

1

VCC (+5V)

2

SPDIF (OPT)
3
4
5
6
7
8
9

10
11
12

SPDIF (RCA)

NA
GND
GND
GND
RCH

LEF
LCH
CEN
GND

1

11 12

2

2-16

Installation

USB pin-header: USB3~6

The mainboard provides 2 front USB pin-header connectors, allowing up to 4
additional USB 2.0 ports. Please plug the USB 2-port module onto these pin­headers.

Socket 478

USB 3~6 Pin Definition

PIN SIGNAL PI N S I GNAL

1

VCC

3

400

5
7
9

2 10

1

USB 0 -

USB 0 +

GND

NC

9

2
4
6
8

10

USB 3~6

VCC
USB 1 -
USB 1 +

GND

GND

Wake-On LAN Connector: WOL

This connector allows you to connect a network card with the Wake-On LAN
function. The connector will power up the system when a signal is received
through the network card.

Socket 478

400

WOL

GND

+5V

2-17

Chapter 2

Wake-On Ring Connector: WOR

This connector allows you to connect a modem card with the Wake-On Ring
function. The connector will power up the system when a singal is received
through the modem card.

Socket 478

400

Ring GND

1 2

1394 pin-header: (optional)

The mainboard provides 2 front 1394 pin-header connectors, allowing up to
2 additional 1394 ports. Please plug the 1394 2-port module onto the pin­headers.

1394 Pin Definition

PIN SIGNAL PIN SIGNAL

TPA1+

1

GND

3

TPB1+

5

VCC

7

GND

9

2
4
6
8

10

TPA1-

GND

TPB1-

VCC

NC

Socket 478

400

2

1

1394

10

9

2-18

Installation

PC Smart Card Reader: SCR

This connector accommodates a Smart Card Reader that allows you to conve­niently make transactions such as financial, health care, telephony, or travel­ing services through a Smart Card user interface software.

Socket 478

SCR Pin Definition

PIN SIGNAL

1
2
3
4
5
6
7
8

9
10
11
12
13
14

VCC

LED

NC
NC

SCRFET#

SCRREST#

SCRCLK

RFU
RFU

SCRIO

GND

SCRPRES#

NC
NC

2

14

400

2-19

1

SCR

13

Chapter 2

Jumpers

The VIA P4PB 400 mainboard provides jumpers for setting the mainboard’s
functions. This section will explain how to change settings for your
mainboard’s functions through the use of the jumpers.

Clear CMOS Jumper: CLEAR_CMOS

The onboard CMOS RAM stores system configuration data and has an onboard
battery power supply. The long-life battery has a lifetime of at least 5 years. If
you want to clear the system configuration data from the CMOS RAM, use
the CLEAR_CMOS (Clear CMOS jumper). Follow the instructions below to
clear the data:

Socket 478

400

WARNING!

1 2 3

CLEAR_CMOS

1

Keep CMOS

3

Clear CMOS

31

You can clear the CMOS by shorting 1-2 pin while
the system is off. Then return it to the 2-3 pin
position. Avoid clearing the CMOS while the
system is on; this will damage the mainboard.

2-20

Installation

Audio Codec Auto Detect Jumper: OB_CODEC

This jumper enables or disables the audio codec auto detect function. If a
CNR card based audio codec is found, then the auto detect function will auto­matically disable the onboard audio codec to avoid conflict. If the auto detect
function is disabled, then the mainboard will always disable the onboard au­dio codec.

Socket 478

1

Disabled

1

3

1

3

400

Auto Mode

3

OB_CODEC

CPU FSB Setting Jumper Switch: SW1

This jumper switch allows you to set up CPU FSB frequency. Follow the
table below to set up:

4 3 2 1 CPU

OFF ON OFF ON

OFF OFF X OFF

OFF OFF OFF ON

OFF OFF ON ON

2

1

34

OFF

ON

Auto

166

133

100

Socket 478

400

SW1

2-21

Chapter 2

Socket 478

400

Slots

The mainboard provides five 32-bit Master PCI bus slots, one AGP4X/8X
slot(1.5V) and one CNR slot.

AGP Slot

PCI Slots

CNR Slot

AGP (Accelerated Graphics Port) Slot

The AGP4X/8X slot (1.5V) allows you to insert an AGP graphics card. AGP
is an interface specification designed for the throughput demands of 3D
graphics. It introduces a 66MHz, 32-bit channel for the graphics controller to
directly access main memory and provides 4X/8X (1.07GB/2.14GB per
second).

PCI Slots

The five PCI slots allow you to insert expansion cards to meet your needs.
When adding or removing PCI expansion cards, ensure that you unplug the
power supply first. Meanwhile, read the documentation for the expansion card
to make any necessary hardware or software settings for the expansion card,
such as jumpers, switches or BIOS configuration.

CNR (Communication Network Riser) Slot

The CNR slot allows you to insert a CNR expansion card. CNR is a specially
designed network, audio, or modem riser card for ATX family mainboards. Its
main processing is done through software and is controlled by the mainboard’s
chipset.

2-22

Installation

PCI Interrupt Request Routing

IRQ allows devices to send interrupt signals to the microprocessor. The PCI
IRQ pins are typically connected to the PCI bus INT A# ~ INT D# pins as
follows:

Order 1 Order 2 Order 3 Order 4

PCI Slot 1 INT A# INT B# INT C# INT D#

PCI Slot 2 INT B# INT C# INT D# INT A#

PCI Slot 3 INT C# INT D# INT A# INT B#

PCI Slot 4 INT D# INT A# INT B# INT C#

PCI Slot 5 INT A# INT B# INT C# INT D#

2-23

33

3

33

BIOS Setup

BIOS Setup

This chapter gives you detailed explaination of each BIOS setup
functions. It consists of the following topics:

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 3-16

PNP/PCI Configurations 3-21

PC Health Status 3-23

Frequency/Voltage Control 3-24

Load Fail-Safe Defaults 3-27

Load Optimized Defaults 3-28

Set Supervisor/User Password 3-29

Save & Exit Setup 3-31

Exit Without Saving 3-32

3-1

Chapter 3

Entering Setup

Power on the computer and press DEL straight away to enter the BIOS setup menu.
If you missed the BIOS setup entry point, you may restart the system and try again.

Control Keys

<↑>

<↓>

<←>

<→>

<Enter> Select the item

<Esc> Jumps to the Exit menu or returns to the main menu from a submenu

<+/PU> Increase the numeric value or make changes

<-/PD> Decrease the numeric value or make changes

<F1> General help, only for Status Page Setup Menu and Option Page

<F5> Restore the previous CMOS value from CMOS, only for Option Page

<F6> Load the default CMOS value from Fail-Safe default table, only for

<F7> Load Optimized defaults

<F10> Save all the CMOS changes and exit

Move to the previous item

Move to the next item

Move to the item in the left hand

Move to the item in the right hand

Setup Menu

Setup Menu

Option Page Setup Menu

3-2

BIOS Setup

Getting Help

After entering the BIOS setup menu, the Main Menu appears.

Main Menu

The main menu displays all BIOS setup categories. Use the control keys (LK) to select
any item/sub-menu. Description of the selected/highlighted category is displayed at the
bottom of the screen.

Sub-Menu

If you find a right pointer symbol (as shown in
the right view) appears on the left of certain
fields, this means a sub-menu is available. The
sub-menu contains additional options. You can
use control keys (LK) to highlight the field and
press <Enter> to enter the sub-menu. To return
from the sub-menu press <Esc >.

General Help <F1>

The BIOS setup program provides a General Help screen. You can call up this screen
from any menu/sub-menu by pressing <F1>. The help screen displays the keys for use
and navigate the BIOS setup. Press <Esc> to exit the help screen.

IDE Primary Master
IDE Primary Slave
IDE Secondary Master
IDE Secondary Slave

3-3

Chapter 3

The Main Menu

The Main Menu contains twelve setup functions and two exit choices. Use
arrow keys to select the items and press <Enter> to accept or enter the sub­menu.

Standard CMOS Features

Use this menu to set basic system configurations.

Advanced BIOS Features

Use this menu to set the advanced features available on your system.

Advanced Chipset Features

Use this menu to set chipset specific features and optimize system performance.

Integrated Peripherals

Use this menu to set onboard peripherals features.

Power Management Setup

Use this menu to set onboard power management functions.

PnP/PCI Configurations

Use this menu to set the PnP and PCI configurations.

3-4

BIOS Setup

PC Health Status

This menu shows the PC health status.

Frequency/Voltage Control

Use this menu to set the system frequency and voltage control.

Load Fail-Safe Defaults

Use this menu to load the BIOS default settings for minimal and stable system
operations.

Load Optimized Defaults

Use this menu to load BIOS default settings for optimal and high performance
system operations.

Set Supervisor Password

Use this menu to set supervisor password.

Save & Exit Setup

Save BIOS setting changes and exit setup.

Exit Without Saving

Abandon all BIOS setting changes and exit setup.

3-5

Chapter 3

Standard CMOS Features

Use the arrow keys to highlight the item and use the <PgUp> or <PgDn> keys
to select the value you desire for each item.

Date

The date format is <Day><Month><Date><Year>.

Day - day of the week, for example Friday. Read-only.
Month - the month from Jan to Dec.
Date - the date from 1 to 31.
Year - the year, range from 1999 to 2098.

Time

The time format is <Hour><Minute><Second>.

Drive A/B

Set the type of floppy drive installed. Available options are None, 360K, 5.25
in., 1.2M, 5.25 in., 720K, 3.5 in., 1.44M, 3.5 in., 2.88M, 3.5 in.

Halt On

Determine the system behaviour if an error is detected at boot. Settings are:

All Errors System halts when any error is detected.
No Errors System does not halt for any error.
All, But Keyboard System halts for all error (except keyboard error).
All, But Diskette System halts for all error (except diskette error).
All, But Disk/Key System halts for all error (except disk/keyboard error)

3-6

BIOS Setup

IDE Primary Master/Slave and Secondary Master/Slave

Press <Enter> to enter the sub-menu and the following screen appears:

The specifications of your drive must match with the drive table. The hard disk
will not work properly if you enter improper information for this category.
Select Auto whenever possible. If you select Manual, make sure the informa­tion provided is from your hard disk vendor or system manufacturer.

IDE Primary Slave The settings are None, Auto, Manual.
Access Mode The settings are CHS, LBA, Large, Auto.
Capacity The formatted size of the storage device.
Cylinder Number of cylinders.
Head Number of heads.
Precomp Write precompensation.
Landing Zone Cylinder location of the landing zone.
Sector Number of sectors.
PIO Mode The settings are Mode 0/1/2/3/4, Auto.
Ultra DMA Mode The settings are Disabled and Auto.

3-7

Chapter 3

Advanced BIOS Features

Virus Warning

Set the Virus Warning feature for IDE Hard Disk boot sector protection. If the
function is enabled, any attempt to write data into this area will cause a beep
and warning message display on screen. Settings: Disabled and Enabled.

CPU L2 Cache ECC Checking

Set the ECC (Error-Correcting Code) feature for Level 2 cache. Facilitates error
detection/correction when data passes through Level 2 cache. Settings: En-
abled and Disabled.

Quick Power On Self Test

Shorten Power On Self Test (POST) cycle and enable shorter bootup time.
Allow BIOS to skip some check items during POST. Settings: Enabled and
Disabled.

First/Second/Third Boot Device

Set the boot device sequence as BIOS attempts to load the disk operating
system. The settings are:

Floppy The system will boot from floppy drive.
LS120 The system will boot from LS-120 drive.
HDD-0 The system will boot from first HDD.

3-8

BIOS Setup

SCSI The system will boot from SCSI.
CD-ROM The system will boot from CD-ROM.
HDD-1 The system will boot from second HDD.
HDD-2 The system will boot from third HDD.
HDD-3 The system will boot from fourth HDD.
ZIP100 The system will boot from ATAPI ZIP drive.

USB-FDD The system will boot from USB floppy drive.
USB-ZIP The system will boot from USB ZIP drive.
USB-CDROM The system will boot from USB CDROM.
USB-HDD The system will boot from USB HDD.

LAN The system will boot from network drive.
Disabled Disable this sequence.

Boot Other Device

Enable the system to boot from other devices if the system fails to boot from
the First/Second/Third boot device. Settings: Enabled and Disabled.

Boot Up Floppy Seek

Set floppy seek during POST, BIOS will determine whether the floppy is 40 or
80 tracks. Settings: Enabled and Disabled.

Boot Up NumLock Status

Set the NumLock status when the system is powered on. “On” will turn key
pad into number keys, and “Off” will turn key pad into arrow keys. Settings: On
and Off.

Typematic Rate Setting

Set the typematic rate and delay. Settings: Enabled and Disabled.

Typematic Rate (Chars/Sec)

When Typematic Rate Setting is enabled. This item allows you to set the rate
(characters/second) at which the keys are accelerated. Settings: 6, 8, 10, 12,
15, 20, 24 and 30.

Typematic Delay (Msec)

When Typematic Rate Setting is enabled. This item allows you to select the
delay between when the key was first pressed and when the acceleration begins.
Settings: 250, 500, 750 and 1000.

3-9

Chapter 3

Security Option

Specifies the type of BIOS password protection that is implemented. Settings
are described below:

Option Description

Setup The password prompt appears only when end users try to

run Setup.

System A password prompt appears every time when the com-

puter is powered on or when end users try to run Setup.

Display Full Screen Logo

Show full screen logo during BIOS bootup process. Settings: Enabled and
Disabled.

Display Small Logo

Show small energy star logo during BIOS bootup process. Settings: Enabled
and Disabled.

3-10

BIOS Setup

Advanced Chipset Features

The Advanced Chipset Features menu is used for optimizing the chipset func­tions.

Note: Change these settings only if you are familiar with the chipset.

AGP Aperture Size

This setting controls just how much memory space can be allocated to AGP for
video purposes. The aperture is a portion of the PCI memory address range
dedicated to graphics memory address space. Host cycles that hit the aperture
range are forwarded to the AGP without any translation. Settings: 4MB, 8MB,
16MB, 32MB, 64MB, 128MB, and 256MB.

AGP Mode

This mainboard supports the AGP 4x interface. When the AGP 4x video card is
used, it can transfer video data at 1066MB/s. AGP 4x is backward-compatible,
leave the default 4x mode on if unsure. When set to 1x mode, the maximum
transfer rate it at 266MB/s, and 2x mode transfers data at 533MB/s. Settings:

4X, 2X and 1X.

AGP Driving Control

The setting is used to adjust AGP driving force. Selecting Manual allows you
to type a AGP driving force in AGP Driving Value. It is strongly suggested to
select Auto to avoid causing any system error. Settings: Auto and Manual.

3-11

Chapter 3

CPU to PCI POST Write

When Enabled, CPU can write up to four words of data to the PCI write buffer
before CPU must wait for PCI bus cycle to finish. If Disabled, CPU must wait
after each write cycle until PCI bus signals that it is ready to receive more data.
Settings: Enabled and Disabled.

3-12

BIOS Setup

Integrated Peripherals

Onboard IDE Channel 1/2

The integrated peripheral controller contains an IDE interface with support for two
IDE channels. Choose Enabled to activate each channel separately. Settings: Disabled,

Enabled.

IDE Prefetch Mode

This allows your hard disk controller to use the fast block mode to transfer data to and
from the hard disk drive. Block mode is also called block transfer, multiple commands
or multiple sector read/write. Enabled enables IDE controller to use block mode; Dis-
abled allows the controller to use standard mode.

Display Card Priority

This setting specifies which VGA card is your primary graphics adapter. Settings: PCI
Slot and AGP.

AC97 Audio

Auto allows the mainboard to detect whether an audio device is used. If the device is
detected, the onboard VIA AC’97 (Audio Codec’97) controller will be enabled; if not,
it is disabled. Disable the controller if you want to use other controller cards to connect
to an audio device. Settings: Auto and Disabled.

MC97 Modem

Auto allows the mainboard to detect whether a modem is used. If a modem is used, the
onboard VIA MC’97 (Modem Codec’97) controller will be enabled; if not, it is disabled.
Disable the controller if you want to use other controller cards to connect to a modem.
Settings: Auto and Disabled.

3-13

Chapter 3

USB Keyboard Support

Enable USB Keyboard Support for DOS and Windows 95. Settings: Enabled and
Disabled.

SuperIO Device

Press <Enter> to enter the sub-menu and the following screen appears:

Onboard FDC Controller

Enable the onboard floppy controller. Select “Enabled” when you have installed a
floppy disk drive. Settings: Enabled and Disabled.

Onboard Serial Port 1/2

Set the base I/O port address and IRQ for the onboard serial port A/serial port B.
Selecting Auto allows BIOS to automatically determine the correct base I/O port
address. Settings: Disabled, 3F8/IRQ4, 2F8/IRQ3, 3E8/IRQ4, 2E8/IRQ3 and Auto.

Serial 2 Mode Select

The field specifies the operation mode for serial port “COM B”. If the mode
selected is not “Serial Port” then “COM B” will be disabled in order for other device
to take effect. Settings are:

Serial Port: RS-232C Serial Port
IrDA(Infrared): IrDA-compliant Serial Infrared Port
ASKIR(Infrared): Amplitude Shift Keyed Infrared Port
SmartCard Reader: SmartCard Reader

3-14

BIOS Setup

UR2 Duplex Mode

Set the operating mode of IR transmission/reception. Under Full Duplex
mode, synchronous, bi-directional transmission/reception is allowed.
Under Half Duplex mode, only asynchronous, bi-directional transmis­sion/reception is allowed. Settings: Full and Half.

Onboard Parallel Port

This specifies the I/O port address and IRQ of the onboard parallel port.
Settings: Disabled, 378/IRQ7, 278/IRQ5 and 3BC/IRQ7.

Parallel Port Mode

Set the parallel port mode. To operate the onboard parallel port as Stan­dard Parallel Port, choose “SPP.” To operate the onboard parallel port in
the EPP mode, choose “EPP.” By choosing “ECP”, the onboard parallel
port will operate in ECP mode. Choosing “ECP + EPP” will allow the
onboard parallel port to support both the ECP and EPP modes simulta­neously. Settings are:

SPP : Standard Parallel Port
EPP : Enhanced Parallel Port
ECP : Extended Capability Port
ECP + EPP: Extended Capability Port + Enhanced Parallel Port

ECP Mode Use DMA

ECP utilizes a DMA channel. This field is only available if Parallel Port
Mode is set to “ECP”. Select DMA channel for ECP use. Settings: 1 and

3.

Game Port Address

Set I./O port address for onboard game port. Settings: Disabled, 201 and

209.

Midi Port Address

Set I./O port address for onboard midi port. Settings: Disabled, 330 and

300.

Midi Port IRQ

Set an IRQ for the onboard midi port. This field is only available if midi
port is not “Disabled”. Settings: 5 and 10.

3-15

Chapter 3

Power Management Setup

The Power Management Setup menu configures the system to most effec­tively save energy while operating in a manner consistent with your own style
of computer use.

ACPI Function

Activate the ACPI (Advanced Configuration and Power Management
Interface) Function. If your operating system is ACPI-aware (i.e. Win­dows 98/98SE/ME/2000/XP) select Enabled. Settings: Enabled and

Disabled.

ACPI Suspend Type

Set the power saving mode for ACPI function. Settings are:

S1(POS) - S1/Power On Suspend (POS) is a low power state. In this state, no
system context (CPU or chipset) is lost and hardware maintains all system con­text.
S3(STR) - S3/Suspend To RAM (STR) is a power-down state. In this state,
power is supplied only to essential components such as main memory and wakeup­capable devices. The system context is saved to main memory, and context is
restored from the memory when a “wakeup” event occurs.
S1 & S3 - Depends on OS to select S1 or S3.

HDD Power Down

Set the time to power down HDD after hard disk inactivity. Settings:
Disable and 1~15 Min.

3-16

BIOS Setup

Power Management Timer

Set the idle time before system enters power saving mode. ACPI OS such
as Windows XP will override this option. Settings: Disable and 1/2/4/6/
8/10/20/30/40 min and 1 hr.

Video Off Option

Select whether or not to turn off the screen when system enters power
saving mode, ACPI OS such as Windows XP will override this option.
Settings are:
Always On - The screen is always on even when system enters power
saving mode.
Suspend -> Off - The screen is turned off when system enters power
saving mode.

Power Off by PWRBTN

This field configures the power button function. Settings are:
Delay 4 Sec - The system is turned off if power button is pressed for more
than four seconds.
Instant-Off - The power button functions as a normal power-on/-off
buttton.

Run VGABIOS if S3 Resume

Select whether to run VGA BIOS if resumed from S3 state. This is only neces­sary for older VGA drivers, select Auto if in doubt. Settings: Auto, Yes and No.

AC Loss Auto restart

The field defines how the system will act after an AC power loss during
system operation. Choose the system power state when the AC power is
back. Settings are:

Off Keep the system in off state until power button is pressed.
On The system automatically restarts when AC power is back.

3-17

Chapter 3

Peripheral Activities

Press <Enter> to enter the sub-menu and the following screen appears:

VGA Event

Decide whether or not the power management unit should monitor VGA activities.
Settings: Off and ON.

LPT & COM Event

Decide whether or not the power management unit should monitor parallel port
(LPT) and serial port (COM) activities. Settings: None, LPT, COM and LPT/

COM.

HDD & FDD Event

Decide whether or not the power management unit should monitor hard disks and
floppy drives activities. Settings: Off and On.

PCI Master Event

Decide whether or not the power management unit should monitor PCI master
activities. Settings: Off and On.

3-18

BIOS Setup

PS2KB Wakeup Select

When select Password, please press ENTER key to change Password, 8 charac­ters maximum. Settings: Hot key.

PS2KB Wakeup from suspend

Select which Hot-Key to wake-up the system from power saving mode. Settings:

Disabled, Ctrl+F1, Ctrl+F2, Ctrl+F3, Ctrl+F4, Ctrl+F5, Ctrl+F6, Ctrl+F7,
Ctrl+F8, Ctrl+F9, Ctrl+F10, Ctrl+F11, Ctrl+F12, Power, Wake and Any Key.

USB Resume

Decide whether or not the USB devices can wake the system from suspend state.
Settings: Disabled and Enabled.

PowerOn by PCI Card

Decide whether or not any PCI card can power up the system or resume from
suspend state. Such PCI cards include LAN, onboard USB ports, etc. Settings:
Disabled and Enabled.

Modem Ring Resume

Decide whether or not any Ring-In signals from Modem can wake up the system
from suspend state. Settings: Disabled and Enabled.

RTC Alarm Resume

The field is used to enable or disable the feature of booting up the system
on a scheduled time/date. Settings: Disabled and Enabled.

Date (of Month)

The field specifies the date for RTC Alarm Resume.

Resume Time

The field specifies the resume time for RTC Alarm Resume.

3-19

Chapter 3

IRQs Activities

Press <Enter> to enter the sub-menu and the following screen appears:

Primary INTR

Selecting ON will cause the system to wake up from power saving modes
if activity is detected from any enabled IRQ channels.

IRQ3~IRQ15

Enables or disables the monitoring of the specified IRQ line. If set to
Enabled, the activity of the specified IRQ line will prevent the system
from entering power saving modes or awaken it from power saving modes.

Note: IRQ (Interrupt Request) lines are system resources allocated to
I/O devices. When an I/O device needs to gain attention of the operating
system, it signals this by causing an IRQ to occur. After receiving the
signal, when the operating system is ready, the system will interrupt
itself and perform the service required by the IO device.

3-20

BIOS Setup

PNP/PCI Configurations

This section describes the BIOS configuration of the PCI bus system. This
section covers some very technical items and it is strongly recommended that
only experienced users should make any changes to the default settings.

PNP OS Installed

When set to Ye s, BIOS will only initialize the PnP cards used for booting
(VGA, IDE, SCSI). The rest of the cards will be initialized by the PnP
operating system like Windows® 95 or 98/98SE. When set to No, BIOS will
initialize all the PnP cards. Set to Ye s the operating system is Plug & Play
capable. The settings: No and Yes.

Reset Configuration Data

Normally, you leave this field Disabled. Select Enabled to reset Extended
System Configuration Data (ESCD) when you exit Setup if you have in­stalled a new add-on and the system reconfiguration has caused such a
serious conflict that the operating system can not boot. The settings:
Enabled and Disabled.

Resource Controlled By

The BIOS can automatically configure all the boot and Plug and Play
compatible devices. Choose “Auto(ESCD)” if unsure, the BIOS will auto­matically assign IRQ, DMA and memory base address fields. The settings:
Auto (ESCD) and Manual.

3-21

Chapter 3

IRQ Resources

The items are adjustable only when Resources Controlled By is set to
Manual. Press <Enter> and you will enter the sub-menu of the items.

IRQ Resources list IRQ 3/4/5/7/9/10/11/12/14/15 for users to set each IRQ
a type depending on the type of device using the IRQ. Settings:

PCI Device: For Plug & Play compatible devices designed for PCI bus
architecture.
Reserved: The IRQ will be reserved for further request.

Assign IRQ For VGA/USB

Assign IRQ for VGA and USB devices. Settings: Disabled and Enabled.

3-22

BIOS Setup

PC Health Status

This section shows the status of your CPU, fan, warning for overall system
status.

Vcore(V), 3.3Vin(V), +5V, +12V, -12V, -5V, 5VSB(V), VBAT(V),
CPU Temperature, Chassis FAN Speed, CPU FAN Speed.

These items display the current status of all of the monitored hardware
devices/components such as CPU voltages, temperatures and all fans’
speeds.

3-23

Chapter 3

Frequency/Voltage Control

DRAM Clock

The chipset supports synchronous and asynchronous mode between host clock
and DRAM clock frequency. Settings: By SPD, 100MHz, 133MHz, 166MHz and

200MHz.

DRAM Timing

This setting determines whether DRAM timing is configured by reading the
contents of the SPD (Serial Presence Detect) EPROM on the DRAM module.
Selecting Yes makes SDRAM Cycle Length and Bank Interleave automatically
determined by BIOS according to the configurations on the SPD. Settings: Manual
and By SPD.

SDRAM CAS Latency

Set the time between SDRAM read command and when the data actually be­comes available. Settings: 1.5, 2, 2.5 and 3.

Bank Interleave

Set the interleave mode of the SDRAM interface. Interleaving allows banks of
SDRAM to alternate their refresh and access cycles. One bank will undergo its
refresh cycle while another is being accessed. This improves performance of the
SDRAM by masking the refresh time of each bank. Settings: Disabled, 2 Bank
and 4 Bank.

Precharge to Active (Trp)

Set the time from DRAM precharge to active state. Settings: 2T and 3T.

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BIOS Setup

Active to Precharge (Tras)

Set the time from active back to precharge state. Settings: 6T and 7T.

Active to CMD (Trcd)

Set the time from active state to command state. Settings: 2T and 3T.

DRAM Command Rate

This setting controls the DRAM command rate. Selecting 1T allows DRAM
signal controller to run at 1T (T=clock cycles) rate. Selecting 2T makes DRAM
signal controller run at 2T rate. 1T is faster than 2T. Settings: 2T Command and
1T Command.

DRAM Burst Len

This setting allows you to set the size for DRAM Burst-Length. The bigger the
size, the faster the system addresses memory. Settings: 4 and 8.

AGP Voltage

This setting allows you to set the appropriate AGP voltage. Settings:

1.5V, 1.6V, 1.7V and 1.8V.

CPU Vcore Select

This setting allows you to adjust the CPU core voltage from 1.100V to 1.
850V at 0.025 increment. Please note that it may be dangerous to adjust
the Vcore over 10% of original CPU specification. Setting options: Default,

1.000V to 1.850V.

DRAM Voltage

This setting allows you to set the appropriate DRAM voltage. Settings:

2.8V, 2.7V, 2.6V and 2.5V.

CPU Clock

This setting specifies the clock frequency of CPU host bus (FSB) and
provides a method for end-users to overclock the processor accordingly.

If the CPU clock is set over the tolerance limit of the CPU, the mainboard will
show the following message “IMPROPER OVERCLOCKING SETTING, SYS­TEM IS RESETTING CPU CLOCK TO DEFAULT. Please re-enter BIOS Setup
and remember to save before quit!”. This feature protects the CPU from damage
due to overclocking.

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Chapter 3

CPU Clock Ratio

This setting controls the multiplier that is used to determine the internal clock
speed of the processor relative to the external or mainboard clock speed.

Spread Spectrum

When the mainboard’s clock generator pulses, the extreme values (spikes) of the
pulses creates EMI (Electromagnetic Interference). The Spread Spectrum func­tion reduces the EMI generated by modulating the pulses so that the spikes of the
pulses are reduced to flatter curves. If you do not have any EMI problems, leave
the setting at Disabled for optimal system stability and performance. But if you
are plagued by EMI, setting to Enabled for EMI reduction. Remember to disable
Spread Spectrum if you are overclocking because even a 0.25% jitter can intro­duce a temporary boost in clock speed of 25MHz (with a 1GHz CPU) which
may just cause your overclocked processor to lock up. Settings: Disabled, +/-0.
25%, -0.5%, +/-0.5% and +/-0.38%.

3-26

BIOS Setup

Load Fail-Safe Defaults

This option on the main menu allows users to restore all the BIOS settings to
the default Fail Safe values. These values are set by the mainboard manufac­turer to provide a minimal and stable system.

When you select Load-Fail Safe Defaults, a message as below appears:

Pressing “Y” loads the default BIOS values that provide a minimal and stable
system configuration.

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Chapter 3

Load Optimized Defaults

This option on the main menu allows users to restore all the BIOS settings to
the default Optimized values. The Optimized Defaults are the default values
also set by the mainboard manufacturer for both optimized and stable perfor­mance of the mainboard.

When you select Load Optimized Defaults, a message as below appears:

Pressing “Y” loads the default values that are factory settings for optimal
and stable system performance.

3-28

BIOS Setup

Set Supervisor/User Password

When you select this function, a message as below will appear on the screen:

Type the password, up to eight characters in length, and press <Enter>.
The password typed now will clear any previously set password from
CMOS memory. You will be prompted to confirm the password. Re-type
the password and press <Enter>. You may also press <Esc> to abort the
selection and not enter a password.

To clear a set password, just press <Enter> when you are prompted to
enter the password. A message will show up confirming the password
will be disabled. Once the password is disabled, the system will boot and
you can enter Setup without entering any password.

When a password has been set, you will be prompted to enter it every
time you try to enter Setup. This prevents an unauthorized person from
changing any part of your system configuration.

Additionally, when a password is enabled, you can also have BIOS to
request a password each time the system is booted. This would prevent
unauthorized use of your computer. The setting to determine when the
password prompt is required is the Security Option of the Advanced
BIOS Features menu. If the Security Option is set to System, the password
is required both at boot and at entry to Setup. If set to Setup, password
prompt only occurs when trying to enter Setup.

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Chapter 3

About Supervisor Password & User Password:

Supervisor password : Can enter and change the settings of

the setup menus.

User password: Can only enter but do not have the right

to change the settings of the setup
menus.

3-30

BIOS Setup

Save & Exit Setup

When you want to quit the Setup menu, you can select this option to save the
changes and quit. A message as below will appear on the screen:

Typing “Y” will allow you to quit the Setup Utility and save the user setup
changes to RTC CMOS.

Typing “N” will return to the Setup Utility.

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Chapter 3

Exit Without Saving

When you want to quit the Setup menu, you can select this option to abandon
the changes. A message as below will appear on the screen:

Typing “Y” will allow you to quit the Setup Utility without saving any
changes to RTC CMOS.

Typing “N” will return to the Setup Utility.

3-32

44

4

44

Driver Setup

Software Setup

This chapter gives you brief descriptions of each
mainboard drivers and applications. It consists of the
following topics:

Utility Driver CD Content 4-2

Note: You must install VIA chipset drivers first before
installing other drivers such as audio or VGA drivers.
The applications will only function correctly if the nec­essary drivers are already installed.

4-1

Chapter 4

Utility Driver CD Content

Getting Started

The VIA P4PB 400 mainboard includes a Driver Utility CD which contains
utility drivers and softwares to enhance the performance of the mainboard.
Please check that you have this CD in your gift box. If the CD is missing in your
gift box, please contact your local dealer for the CD.

Note: The utility drivers and softwares are updated from time to time. Please
visit VPSD website (http://www.viavpsd.com/) for the latest updated utility
drivers and softwares of the VIA P4PB 400 mainboard.

Running the Driver Utility CD

To start using the CD, just simply insert the CD into your local CD-ROM or
DVD-ROM drive. The CD should run automatically when you close your CD­ROM or DVD-ROM drive. The utility drivers and softwares menu screen should
then appear on your desktop. If the CD does not run automatically, you can
run the CD manually by typing “D:\Setup.exe” at Start\Run.

(Please note that D: might not be your CD-ROM/DVD-ROM drive letter. Make
sure you type the correct CD-ROM/DVD-ROM drive letter on your system).

CD Content

Upon running the CD, the following utility drivers and softwares menu screen
appears as follow:

4-2

Driver Setup

The utility drivers and softwares contain in this CD are:

- VIA 4in1 Drivers: Contains VIA ATAPI Vendor Support Driver (enables the
performance enhancing bus mastering functions on ATA-capable Hard Disk
Drives and ensures IDE device compatibility), AGP VxD Driver (provide
service routines to your VGA driver and interface directly to hardware,
providing fast graphical access), IRQ Routing Miniport Driver (sets the
system’s PCI IRQ routing sequence) and VIA INF Driver (enables the VIA
Power Management function).

- VIA Audio Driver: Enhance the onboard VIA audio chip.

- VIA LAN Driver: Enhance the onboard VIA LAN chip.

- VIA USB 2.0 Driver: Enhance VIA USB 2.0 ports.

- ITE Smart Card Reader Driver and Utility: Enhance ITE Smart Card socket.

- FliteDeck: Contains four sub-utilities (optional)

i) JetStream: enables directly overclocking FSB under Windows OS.
ii) MissionControl: lets you monitor local and remote computer systems.
iii) SysProbe: allows you to view your computer hardware configuration
iv) FlashPort: allows you to flash BIOS under Windows OS.

4-3