ASUS P4B533 User Manual

P4B533

User Guide

Motherboard

Checklist

E985
First Edition

April 2002

Copyright © 2002 ASUSTeK COMPUTER INC. All Rights Reserved.

No part of this manual, including the products and software described in it, may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any
language in any form or by any means, except documentation kept by the purchaser for
backup purposes, without the express written permission of ASUSTeK COMPUTER INC.
(“ASUS”).

Product warranty or service will not be extended if: (1) the product is repaired, modified or
altered, unless such repair, modification of alteration is authorized in writing by ASUS; or (2)
the serial number of the product is defaced or missing.

ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES
OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE
LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
(INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE
OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE), EVEN IF ASUS HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR
ERROR IN THIS MANUAL OR PRODUCT.

SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED
FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME
WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS.
ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR
INACCURACIES THAT MAY APPEAR IN THIS MANUAL, INCLUDING THE PRODUCTS
AND SOFTWARE DESCRIBED IN IT.

Products and corporate names appearing in this manual may or may not be registered
trademarks or copyrights of their respective companies, and are used only for identification or
explanation and to the owners’ benefit, without intent to infringe.

ii

Contents

Contents ......................................................................................... iii

FCC/CDC statements.....................................................................vi

Safety information ......................................................................... vii

About this guide............................................................................ viii

How this guide is organized ................................................ viii

Conventions used in this guide .............................................ix

Where to find more information .............................................ix

ASUS contact information ...............................................................x

P4B533 specifications summary ....................................................xi

Chapter 1: Product introduction

1.1 Welcome! ........................................................................... 1-1

1.2 Package contents............................................................... 1-1

1.3 Special features.................................................................. 1-2

1.3.1 Product highlights .................................................. 1-2

1.3.2 Value-added solutions............................................ 1-4

1.4 Motherboard overview........................................................ 1-6

1.4.1 Major components ................................................. 1-6

1.4.2 Core specifications ................................................ 1-8

Features

Chapter 2: Hardware information

2.1 Motherboard installation ..................................................... 2-1

2.1.1 Placement direction ............................................... 2-1

2.1.2 Screw holes ........................................................... 2-1

2.2 Motherboard layout ............................................................ 2-2

2.3 Before you proceed ............................................................ 2-3

2.4 Central Processing Unit (CPU)........................................... 2-4

2.4.1 Overview ................................................................ 2-4

2.4.2 Installing the CPU .................................................. 2-5

2.4.3 Installing the heatsink and fan ............................... 2-7

2.4.4 Connecting the CPU fan cable .............................. 2-9

2.5 System memory ............................................................... 2-10

2.5.1 Overview .............................................................. 2-10

2.5.2 Memory configurations .........................................2-11

2.5.3 Installing a DIMM ..................................................2-11

2.5.4 Removing a DIMM ............................................... 2-12

iii

Safeguards

Contents

2.6 Expansion slots ................................................................ 2-13

2.6.1 Installing an expansion card ................................ 2-13

2.6.2 Configuring an expansion card ............................ 2-13

2.6.3 PCI slots .............................................................. 2-15

2.6.4 AGP slot............................................................... 2-15

2.7 Switches and jumpers ...................................................... 2-16

2.8 Connectors ....................................................................... 2-24

Chapter 3: Powering up

3.1 Starting up for the first time ................................................ 3-1

3.2 Vocal POST Messages ...................................................... 3-2

3.3 Powering off the computer ................................................. 3-4

Chapter 4: BIOS setup

4.1 Managing and updating your BIOS .................................... 4-1

4.1.1 Using ASUS EZ Flash to update the BIOS ............ 4-1

4.1.2 Using AFLASH to update the BIOS ....................... 4-3

4.2 BIOS Setup program .......................................................... 4-7

4.2.1 BIOS menu bar ...................................................... 4-8

4.2.2 Legend bar............................................................. 4-8

4.3 Main Menu........................................................................ 4-10

4.3.1 Primary and Secondary Master/Slave ................. 4-12

4.3.2 Keyboard Features .............................................. 4-16

4.4 Advanced Menu ............................................................... 4-17

4.4.1 Chip Configuration ............................................... 4-21

4.4.2 I/O Device Configuration...................................... 4-24

4.4.3 PCI Configuration ................................................ 4-26

4.5 Power Menu ..................................................................... 4-28

4.5.1 Power Up Control ................................................ 4-30

4.5.2 Hardware Monitor ................................................ 4-32

4.6 Boot Menu ........................................................................ 4-34

4.7 Exit Menu ......................................................................... 4-36

iv

Contents

Chapter 5: Software support

5.1 Install an operating system................................................. 5-1

5.2 Support CD information...................................................... 5-1

5.2.1 Running the support CD ........................................ 5-1

5.2.2 Main menu ............................................................. 5-2

5.2.3 Software menu....................................................... 5-3

5.2.4 Drivers menu ......................................................... 5-5

5.2.5 DOS Utilities menu ................................................ 5-6

5.2.6 ASUS Contact Information..................................... 5-6

5.2.7 Other information ................................................... 5-7

5.3 Software information .......................................................... 5-9

5.3.1 ASUS Update ........................................................ 5-9

5.3.2 ASUS MyLogo2™................................................ 5-10

5.3.3 ASUS PC Probe .................................................. 5-12

5.3.4 E-Color 3Deep ..................................................... 5-17

5.3.5 Winbond Voice Editor .......................................... 5-20

5.3.6 Multi-Channel Audio Feature ............................... 5-24

Index ........................................................................................ I-1

v

FCC/CDC statements

Federal Communications Commission Statement

This device complies with FCC Rules Part 15. Operation is subject to the
following two conditions:

• This device may not cause harmful interference, and

• This device must accept any interference received including interference
that may cause undesired operation.

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
in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with
manufacturer’s instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment to an outlet on a circuit different from that to
which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

The use of shielded cables for connection of the monitor to the
graphics card is required to assure compliance with FCC regulations.
Changes or modifications to this unit not expressly approved by the
party responsible for compliance could void the user’s authority to
operate this equipment.

Canadian Department of Communications Statement

This digital apparatus does not exceed the Class B limits for radio noise
emissions from digital apparatus set out in the Radio Interference
Regulations of the Canadian Department of Communications.

This class B digital apparatus complies with Canadian ICES-003.

vi

Safety information

Electrical safety

• To prevent electrical shock hazard, disconnect the power cable from
the electrical outlet before relocating the system.

• When adding or removing devices to or from the system, ensure that
the power cables for the devices are unplugged before the signal
cables are connected. If possible, disconnect all power cables from the
existing system before you add a device.

• Before connecting or removing signal cables from the motherboard,
ensure that all power cables are unplugged.

• Seek professional assistance before using an adpater or extension
cord. These devices could interrupt the grounding circuit.

• Make sure that your power supply is set to the correct voltage in your
area. If you are not sure about the voltage of the electrical outlet you
are using, contact your local power company.

• If the power supply is broken, do not try to fix it by yourself. Contact a
qualified service technician or your retailer.

Operation safety

• Before installing the motherboard and adding devices on it, carefully
read all the manuals that came with the package.

• Before using the product, make sure all cables are correctly connected
and the power cables are not damaged. If you detect any damage,
contact your dealer immediately.

• To avoid short circuits, keep paper clips, screws, and staples away from
connectors, slots, sockets and circuitry.

• Avoid dust, humidity, and temperature extremes. Do not place the
product in any area where it may become wet.

• Place the product on a stable surface.

• If you encounter technical problems with the product, contact a

qualified service technician or your retailer.

vii

About this guide

This user guide contains the information you need when installing the
ASUS P4B533 motherboard.

How this guide is organized

This manual contains the following parts:

• Chapter 1: Product introduction

This chapter describes the features of the P4B533 motherboard. It
includes brief descriptions of the special attributes of the motherboard
and the new technology it supports.

• Chapter 2: Hardware information

This chapter lists the hardware setup procedures that you have to
perform when installing system components. It includes description of
the switches, jumpers, and connectors on the motherboard.

• Chapter 3: Powering up

This chapter describes the power up sequence and gives information
on the BIOS beep codes.

• Chapter 4: BIOS setup

This chapter tells how to change system settings through the BIOS
Setup menus. Detailed descriptions of the BIOS parameters are also
provided.

• Chapter 5: Software support

This chapter describes the contents of the support CD that comes with
the motherboard package.

• Index

This part contains an alphabetical list of the topics found in this
document.

viii

Conventions used in this guide

To make sure that you perform certain tasks properly, take note of the
following symbols used throughout this manual.

WARNING: Information to prevent injury to yourself when trying
to complete a task.

CAUTION: Information to prevent damage to the components
when trying to complete a task.

IMPORTANT: Information that you MUST follow to complete a
task.

NOTE: Tips and additional information to aid in completing a task.

Where to find more information

Refer to the following sources for additional information and for product
and software updates.

1. ASUS Websites

The ASUS websites worldwide provide updated information on ASUS
hardware and software products. The ASUS websites are listed in the
ASUS Contact Information on page x.

2. Optional Documentation

Your product package may include optional documentation, such as
warranty flyers, that may have been added by your dealer. These
documents are not part of the standard package.

ix

ASUS contact information

ASUSTeK COMPUTER INC. (Asia-Pacific)

Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112
General Tel: [phone]
General Fax: [phone]
General Email: [e-mail]

Technical Support

MB/Others (Tel): [phone] (English)
Notebook (Tel): [phone] (English)
Desktop/Server (Tel): [phone] (English)
Support Fax: [phone]
Support Email: [e-mail]
Web Site: www.asus.com.tw
Newsgroup: cscnews.asus.com.tw

ASUS COMPUTER INTERNATIONAL (America)

Address: 6737 Mowry Avenue, Mowry Business Center,

Building 2, Newark, CA 94560, USA
General Fax: [phone]
General Email: [e-mail]

Technical Support

Support Fax: [phone]
General Support: [phone]
Notebook Support: +1-877-918-ASUS (2787)
Web Site: www.asus.com
Support Email: [e-mail]

ASUS COMPUTER GmbH (Europe)

Address: Harkortstr. 25, 40880 Ratingen, BRD, Germany
General Fax: [phone]
General Email: [e-mail] (for marketing requests only)

Technical Support

Support Hotline: MB/Others: [phone]
Notebook (Tel): [phone]
Support Fax: [phone]
Support (Email): www.asuscom.de/de/support (for online support)
Web Site: www.asuscom.de

x

P4B533 specifications summary

CPU

Chipset

Front Side Bus (FSB)
Memory

Expansion slots

IDE
Audio (optional)
Special features

®

Socket 478 for Intel
On-die 512KB L2 cache

Intel 82845E MCH
Intel 82801 DA ICH4

533/400 MHz
3 x 184-pin DDR DIMM sockets for up to 2GB memory

Supports PC2100/PC1600 unbuffered ECC/non-ECC DDR
DIMMs

1 x AGP 4X (1.5V only)
6 x PCI

1 x UltraDMA 100/66/33
C-Media 8738-MX 6-channel PCI audio controller
ASUS JumperFree™ mode

ASUS POST Reporter™
ASUS EZ Plug™
ASUS MyLogo2
ASUS Q-Fan
ASUS EZ Flash
Power Loss Restart
SFS (Stepless Frequency Selection)
Adjustable CPU V
Multi-language BIOS
AGP warning LED

Pentium® 4

, and memory and AGP voltages

CORE

Rear panel I/O

Internal I/O

BIOS features

1 x Parallel port
2 x Serial ports
1 x PS/2 keyboard port
1 x PS/2 mouse port
4 x USB 2.0/USB 1.1 ports
Line In/Line Out/Microphone ports (optional)

1 x USB 2.0/1.1 connector for 2 additional USB ports
CPU/Power/Chassis fan connectors
20-pin/4-pin ATX power connectors
IDE LED/Power LED connectors
Chassis intrusion, SMBus, and SIR connectors
GAME/MIDI connector
S/PDIF In/Out connector
CD/AUX/Modem audio connectors (optional)
Front panel audio connector (optional)

4Mb Flash ROM, Award BIOS, TCAV, PnP, DMI2.0, WfM2.0,
SM BIOS2.3, Multi-language BIOS, ASUS EZ Flash, ASUS
MyLogo2

xi

P4B533 specifications summary

Industry standard
Manageability

Form Factor
Support CD contents

PCI 2.2, USB 2.0
WfM 2.0. DMI 2.0, WOL/WOR by PME, chassis intrusion,

SMBus
ATX form factor: 12 in x 8.6 in (30.5 cm x 21.9 cm)
Device drivers

ASUS PC Probe
ASUS LiveUpdate
Trend Micro™ PC-cillin 2002 anti-virus software
CyberLink Power Player SE, VideoLive Mail

xii

Chapter 1

This chapter describes the features of the
P4B533 motherboard. It includes brief
explanations of the special attributes of the
motherboard and the new technology it
supports.

Product introduction

Chapter summary

1.1 Welcome! ........................................................ 1-1

1.2 Package contents .......................................... 1-1

1.3 Special features ............................................. 1-2

1.4 Motherboard overview................................... 1-6

ASUS P4B533 motherboard

1.1 Welcome!

Thank you for buying the ASUS® P4B533 motherboard!

The ASUS
technologies making it another standout in the long line of ASUS quality
motherboards!

The P4B533 incorporates the Intel
package coupled with the Intel® 845E (Brookdale-E) chipset to set a new
benchmark for an effective desktop platform solution.

Supporting up to 2GB of system memory with PC2100/1600 DDR
SDRAM, high-resolution graphics via an AGP 4X slot, USB 2.0 capability,
high-speed data transfers using the ATA100 protocol, and 6-channel PCI
audio features, the P4B533 is your perfect vehicle to get ahead in the
world of power computing!

Before you start installing the motherboard, and hardware devices on it,
check the items in your package with the list below.

P4B533 motherboard delivers a host of new features and latest

®

Pentium® 4 Processor in 478-pin

1.2 Package contents

Check your P4B533 package for the following items.

ASUS P4B533 motherboard

ATX form factor: 12 in x 8.6 in (30.5 cm x 21.9 cm)
ASUS P4B533 series support CD
ASUS USB 2.0/GAME module
ASUS S/PDIF module (for audio models only)
80-conductor ribbon cable for UltraDMA/33/66/100 IDE drives
40-conductor IDE cable
Ribbon cable for a 3.5-inch floppy drive
Bag of extra jumper caps
User Guide
Quick Setup Guide and Reference Card (retail box only)
Jumpers and Connectors Sticker (retail box only)

If any of the above items is damaged or missing, contact your retailer.

ASUS P4B533 motherboard user guide

1-1

1.3 Special features

1.3.1 Product highlights

Latest processor technology

The P4B533 motherboard supports the latest Intel
a 478-pin surface mount ZIF socket. The Pentium 4 processor with 512KB L2
cache on 0.13 micron process features the Intel
architecture that includes hyper-pipelined technology , a rapid execution
engine, a 533MHz system bus, and an execution trace cache to offer a
significant increase in performance. See page 2-4 for more information.

®

Pentium® 4 Processor via

®

NetBurst™ micro-

DDR memory support

Employing the Double Data Rate (DDR) memory technology, the P4B533
motherboard supports up to 2GB of system memory using PC2100/1600
DDR DIMMs. The ultra-fast 266MHz memory bus doubles the speed of the
PC133 SDRAM to deliver the required bandwidth for the latest 3D
graphics, multimedia, and Internet applications. See page 2-10.

USB 2.0 technology

The motherboard implements the new Universal Serial Bus (USB) 2.0
specification, extending the connection speed from 12 Mbps on USB 1.1
to a fast 480 Mbps on USB 2.0. The higher bandwidth of USB 2.0 allows
connection of devices such as high resolution video conferencing
cameras, next generation scanners and printers, and fast storage units.
USB 2.0 is backward compatible with USB 1.1. See page 2-29.

NOTICE: The Microsoft USB 2.0 driver has not been officially released
as of the support CD production date. Please download the USB 2.0
driver from the Microsoft website (www.microsoft.com) to upgrade your
USB 1.1 ports to USB 2.0.

Digital audio interface

On audio models, a digital audio connector is onboard to accommodate
the bundled Sony/Philips Digital Interface (S/PDIF) In/Out module, which
supports coaxial interfaces. Experience 5.1-channel surround sound and
enhanced 3D audio while playing DVDs and computer games. See page
2-32.

1-2

Chapter 1: Product introduction

ASUS EZ Plug™

This patented ASUS technology lets you use your existing power supply
rather than buying a new ATX 12V power supply. The ASUS EZ Plug™ is
a 4-pin auxillary +12V connector mounted on the motherboard that
connects a regular 4-pin device power connector from the power supply.
This connector is necessary to provide the additional power required by
the P4 CPU. See page 2-27.

ASUS POST Reporter™

P4B533 offers a new exciting feature called the ASUS POST Reporter™
to provide friendly voice messages and alerts during the Power-On Self­Tests (POST). Through the system’s internal speaker, or an added
external speaker, you will hear the messages informing you of the system
boot status and causes of boot errors, if any. The bundled Winbond Voice
Editor software allows you to customize the voice messages, and provides
multi-language support. See details on pages 4-25 and 5-20.

ASUS MyLogo2™

This new feature present in the P4B533 motherboard allows you to
personalize and add style to your system with customizable boot logos.
See details on pages 4-35 and 5-10.

ASUS Multi-language BIOS

The multi-language BIOS allows you to select the language of your choice
from the available options. The localized BIOS menus allow you to
configure easier and faster. Visit the ASUS website for information on the
supported languages. See page 4-11 on how to select your desired
language.

ASUS P4B533 motherboard user guide

1-3

ASUS EZ Flash BIOS

With the ASUS EZ Flash, you can easily update the system BIOS even
before loading the operating system. No need to use a DOS-based utility
or boot from a floppy disk.

ASUS Q-Fan feature

The ASUS Q-Fan technology smartly adjusts the fan speeds according to
the system loading to ensure quiet, cool, and efficient operation. See
details on page 4-32.

1.3.2 Value-added solutions

Overclocking

The P4B533 overclocking features:

• adjustable CPU frequency multiple in BIOS using the ASUS
JumperFree™ solution

• adjustable FSB/DDR/AGP frequency ratio

• adjustable CPU V

• Stepless Frequency Selection (SFS) for fine-tuning system bus

frequency from 100MHz up to 200MHz at 1MHz increments

, and DDR memory and AGP voltages

CORE

Concurrent PCI

This feature allows multiple PCI transfers from PCI master buses to the
memory and processor.

Temperature, fan, and voltage monitoring

The CPU temperature is monitored by the ASUS ASIC to prevent
overheating and damage. The system fan rotations per minute (RPM) is
monitored for timely failure detection. The system voltage levels are
monitored to ensure stable supply of current for critical components.

1-4

Chapter 1: Product introduction

Dual function power switch

While the system is ON, pressing the power switch for less than 4 seconds
puts the system to sleep mode or to soft-off mode, depending on the BIOS
setting. Pressing the power switch for more than 4 seconds lets the
system enter the soft-off mode regardless of the BIOS setting.

ACPI ready

The Advanced Configuration power Interface (ACPI) provides more energy
saving features for operating systems that support OS Direct Power
Management (OSPM).

Auto fan off

The system fans power off automatically when the system is in sleep
mode. This feature reduces both power consumption and system noise.

Chassis intrusion detection

The motherboard supports chassis intrusion monitoring through the ASUS
ASIC. A chassis intrusion event is retained in the system memory for more
protection.

ASUS P4B533 motherboard user guide

1-5

1.4 Motherboard overview

Before you install the P4B533 motherboard, familiarize yourself with its
physical configuration and available features to facilitate the motherboard
installation and future upgrades. A sufficient knowledge of the motherboard
specifications will also help you avoid mistakes that may damage the
board and its components.

1.4.1 Major components

The following are the major components of the P4B533 motherboard as
pointed out in the picture on page 1-7.

1. ASUS EZ Plug™ +12V connector

2. ATX 12V connector

3. DIP switches (DSW1)

4. CPU socket

5. North Bridge controller

6. DDR DIMM sockets

7. Floppy connector

8. ATX power connector

9. South Bridge controller

10. IDE connectors

11. DIP switches (DSW2)

12. Flash EEPROM

13. ASUS ASIC

14. Standby power LED

15. Audio controller (optional)

16. PCI slots

20. PS/2 mouse port

21. Parallel port

22. Line In jack (optional)

23. Line Out jack (optional)

24. Microphone jack (optional)

25. USB 2.0 ports 1 and 2

26. Serial ports

27. USB 2.0 ports 3 and 4

28. Keyboard port

1-6

17. Super I/O controller
18 AGP warning LED

19. AGP slot

See page 1-8 for the specifications of each component. Refer to
Chapter 2 for detailed information on the components.

Chapter 1: Product introduction

19

2

3 4

1

56

7

8

18
17

16

15

14

20 21

9

10

11

13 12

22

28 27 26 25

ASUS P4B533 motherboard user guide

23
24

1-7

1.4.2 Core specifications

1

ASUS EZ Plug™ +12V connector. This ASUS patented auxilliary

power connector is used if you don’t have an ATX +12V power
supply. Connect a 4-pin device connector from a standard power
supply to this connector to provide sufficient power to the CPU.

2

ATX 12V connector. This power connector connects the 4-pin 12V

plug from the ATX 12V power supply.

3

DIP switches (DSW1). This 6-switch Dual Inline Package (DIP)

allows you to set the CPU external frequency.

4

CPU socket. A 478-pin surface mount, Zero Insertion Force (ZIF)

socket for the Intel

®

Pentium® 4 Processor, with 533/400 MHz
system bus that allows 4.3GB/s and 3.2GB/s data transfer rates,
respectively.

5

North bridge controller. The Intel

®

845E Memory Controller Hub
(MCH) provides the processor interface with 533/400MHz
frequency, system memory interface at 133/100MHz operation, and

1.5V AGP interface that supports AGP 2.0 specification including
2X/4X Fast Write protocol. The MCH interconnects to the south
bridge ICH4 via the Intel proprietary Hub Interface.

6

DDR DIMM sockets. These three 184-pin DIMM sockets support

up to 2GB system memory using unbuffered ECC or non-ECC
PC2100/1600 DDR DIMMs.

7

Floppy disk connector. This connector accommodates the

provided ribbon cable for the floppy disk drive. One side of the
connector is slotted to prevent incorrect insertion of the floppy disk
cable.

8

ATX power connector. This 20-pin connector connects to an ATX

+12V power supply. The power supply must have at least 1A on the
+5V standby lead (+5VSB).

9

South bridge controller. The fourth-generation Intel I/O Controller

Hub (ICH4) is a subsystem that integrates various I/O functions
including 2-channel ATA/100 bus master IDE controller, up to six
USB 2.0/1.1 ports, I/O APIC, SMBus 2.0 controller, LPC interface,
AC’97 2.2 interface, PCI 2.2 interface, and integrated LAN
controller. The ICH4 also contains the necessary arbitration and
buffering for efficient utilization of these interfaces.

1-8

Chapter 1: Product introduction

10

IDE connectors. These dual-channel bus master IDE connectors

support up to four Ultra DMA/100/66, PIO Modes 3 & 4 IDE
devices. Both the primary (blue) and secondary (black) connectors
are slotted to prevent incorrect insertion of the IDE ribbon cable.

11

12

13

14

15

DIP switches (DSW2). This 4-switch Dual Inline Package (DIP)

allows you to select the CPU frequency multiple.
Flash EEPROM. This 4Mb firmware contains the programmable

BIOS program.
ASUS ASIC. This chip performs multiple system functions that

include hardware and system voltage monitoring, IRQ routing,
among others.

Standby power LED. This LED lights up if there is a standby
power on the motherboard. This LED acts as a reminder to turn off
the system power before plugging or unplugging devices.

Audio controller. This C-Media 6-channel PCI audio chip supports
legacy audio and HRTF 3D positional audio functions. The chip
also supports 24-bit S/PDIF In (0.5~5V) and S/PDIF Out (44.1K
and 48K formats) professional digital audio interface, and one
MPU-401 UART mode compatible MIDI/game port.

(on audio models only)

16

17

18

19

PCI slots. These six 32-bit PCI 2.2 expansion slots support bus

master PCI cards like SCSI or LAN cards with 133MB/s maximum
throughput.

Super I/O controller. This Low Pin Count (LPC) interface provides
the commonly used Super I/O functionality. The chipset supports a
high-performance floppy disk controller for a 360K/720K/1.44M/

2.88M floppy disk drive, a multi-mode parallel port, two standard
compatible UARTs, a Standard Infrared (SIR), and a Flash ROM
interface.

AGP warning LED. Serving as a smart burn-out protection for the
motherboard, this red LED lights up if you plug in any 3.3V AGP
card into the AGP slot. When this LED is lit, there is no way you
can turn on the system power even if you press the power button.

AGP slot. This Accelerated Graphics Port (AGP) slot supports 1.5V
AGP4X mode graphics cards for 3D graphical applications.

ASUS P4B533 motherboard user guide

1-9

20

PS/2 mouse port. This green 6-pin connector is for a PS/2 mouse.

21

22

23

24

25

26

Parallel port. This 25-pin port connects a parallel printer, a

scanner, or other devices.
Line In jack. This Line In (light blue) jack connects a tape player or

other audio sources. In 6-channel mode, the function of this jack
becomes Rear Speaker Out.

Line Out jack. This Line Out (lime) jack connects a headphone or
a speaker. In 6-channel mode, the function of this jack becomes
Front Speaker Out.

Microphone jack. This Mic (pink) jack connects a microphone. In
6-channel mode, the function of this jack becomes Bass/Center.

(on audio models only)

(on audio models only)

(on audio models only)

USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus
(USB) ports are available for connecting USB 2.0 devices.

Serial ports. These two 9-pin COM1/COM2 ports are for pointing
devices or other serial devices.

27

28

USB 2.0 ports 3 and 4. These two 4-pin Universal Serial Bus

(USB) ports are available for connecting USB 2.0 devices.
PS/2 keyboard port. This purple 6-pin connector is for a PS/2

keyboard.

1-10

Chapter 1: Product introduction

Chapter 2

This chapter describes the hardware setup
procedures that you have to perform when
installing system components. It includes
details on the switches, jumpers, and
connectors on the motherboard.

Hardware information

Chapter summary

2.1 Motherboard installation ............................... 2-1

2.2 Motherboard layout ....................................... 2-2

2.3 Before you proceed ....................................... 2-3

2.4 Central Processing Unit (CPU) ..................... 2-4

2.5 System memory ........................................... 2-10

2.6 Expansion slots ........................................... 2-13

2.7 Switches and jumpers ................................. 2-16

2.8 Connectors ................................................... 2-24

ASUS P4B533 motherboard

2.1 Motherboard installation

Before you install the motherboard, study the configuration of your chassis
to ensure that the motherboard fits into it. The P4B533 uses the ATX form
factor that measures 12 inches x 8.6 inches (30.5 x 21.9 cm), a standard
fit for most chassis.

Make sure to unplug the power cord before installing or removing the
motherboard. Failure to do so may cause you physical injury and
damage motherboard components.

2.1.1 Placement direction

When installing the motherboard, make sure that you place it into the
chassis in the correct orientation. The edge with external ports goes to the
rear part of the chassis as indicated in the image below.

2.1.2 Screw holes

Place six (6) screws into the holes indicated by circles to secure the
motherboard to the chassis.

Do not overtighten the screws! Doing so may damage the
motherboard.

Place this side towards
the rear of the chassis

ASUS P4B533 motherboard user guide

2-1

2.2 Motherboard layout

21.9cm (8.6in)

PS/2KBMS
T: Mouse
B: Keyboard

CPU_FAN

USB20_34

COM1

COM2

USB20_12

Top:Line In
Center:Line Out
Below:Mic In

FP_LINE_IN

BCS1
BCS2

FP_AUDIO

MODEM

AUDIO_SW

SPDIF_C

PARALLEL PORT

USBPWR_12

C-Media

CMI8738 6CH

Audio Controller

EZ_PLUG

ATX12V

DSW1

I/O

Super

CDAUX

FP_LO_SWL
FP_LO_SWR

GAME

KBPWR

OVER_VOLT

USBPWR_34

AGP_WARN

Socket 478

Intel 845E

Memory

Controller

Hub (MCH)

Accelerated Graphics Port (AGP)

PCI1

®

PCI2

PCI3

CMOS Power

PCI4

PCISMB_SW1
PCISMB_SW2

PCI5

SB_PWR

PCI6

Speech

Controller

SMARTCON

JEN
USBPWR_56
SPEECH

CR2032 3V

Lithium Cell

with

ASIC

ASUS

USB20_56

FLOPPY

DDR DIMM1 (64/72 bit, 184-pin module)

DDR DIMM2 (64/72 bit, 184-pin module)

DDR DIMM3 (64/72 bit, 184-pin module)

ATX Power Connector

0 1

2 3

4 5

PWR_FAN

CHA_FAN

IDE2

Intel I/O

Controller

Hub

(ICH4)

IDE1

CLRTC

P4B533

AFPANEL

PANEL

DSW2

4Mbit

Firmware

Hub

IR_CON

SMB

IDE_LED

CHASSIS

TRPWR

Monitor

Hardware

30.5cm (12.0in)

2-2

The audio features are optional. These components are grayed out in
the above motherboard layout.

Chapter 2: Hardware information

2.3 Before you proceed

Take note of the following precautions before you install motherboard
components or change any motherboard settings.

1. Unplug the power cord from the wall socket before touching any
component.

2. Use a grounded wrist strap or touch a safely grounded object or to
a metal object, such as the power supply case, before handling
components to avoid damaging them due to static electricity.

3. Hold components by the edges to avoid touching the ICs on them.

4. Whenever you uninstall any component, place it on a grounded
antistatic pad or in the bag that came with the component.

5. Before you install or remove any component, ensure that the

ATX power supply is switched off or the power cord is
detached from the power supply. Failure to do so may cause

severe damage to the motherboard, peripherals, and/or
components.

When lit, the green LED (SB_PWR) indicates that the system is ON, in
sleep mode, or in soft-off mode, a reminder that you should shut down
the system before removing or plugging in any motherboard
component.

The red LED (AGP_WARN) is a smart protection from motherboard
burn out caused by an incorrect AGP card. If you plug in any 3.3V AGP
card into the 1.5V AGP slot, this LED lights up thus preventing the
system to power up. This LED remains off if you plug in a 1.5V AGP
card.

AGP_WARN

ON

Incorrect

AGP Card

®

P4B533

SB_PWR

OFF

Correct

AGP Card

P4B533 Onboard LED

Standby

Power

ASUS P4B533 motherboard user guide

ON

OFF

Powered

Off

2-3

2.4 Central Processing Unit (CPU)

2.4.1 Overview

The motherboard comes with a surface mount 478-pin Zero Insertion
Force (ZIF) socket. The socket is designed for the Intel Pentium 4
Processor in the 478-pin package with 512KB L2 cache on 0.13 micron
process. This processor includes the Intel® NetBurst™ micro-architecture
that features the hyper-pipelined technology, rapid execution engine,
533/400MHz system bus, and execution trace cache. Together, these
attributes improve system performance by allowing higher core
frequencies, faster execution of integer instructions, and data transfer
rates of 4.2GB/s and 3.2GB/s.

Gold Mark

Note in the illustration that the CPU has a gold triangular mark on one
corner. This mark indicates the processor Pin 1 that should match a
specific corner of the CPU socket.

Incorrect installation of the CPU into the socket may bend the pins and
severely damage the CPU!

2-4

Chapter 2: Hardware information

2.4.2 Installing the CPU

Follow these steps to install a CPU.

1. Locate the 478-pin ZIF socket on the motherboard.

2. Unlock the socket by pressing the lever sideways, then lift it up to a
90°-100° angle.

Socket Lever

90 -100

Make sure that the socket lever is lifted up to 90°-100° angle,
otherwise the CPU does not fit in completely.

ASUS P4B533 motherboard user guide

2-5

3. Position the CPU above the socket such that its marked corner
matches the base of the socket lever.

4. Carefully insert the CPU into the socket until it fits in place.

The CPU fits only in one correct orientation. DO NOT force the CPU
into the socket to prevent bending the pins and damaging the CPU!

Gold Mark

5. When the CPU is in place, press it firmly on the socket while you push
down the socket lever to secure the CPU. The lever clicks on the side
tab to indicate that it is locked.

2-6

Chapter 2: Hardware information

2.4.3 Installing the heatsink and fan

The Intel® Pentium® 4 Processor requires a specially designed heatsink
and fan assembly to ensure optimum thermal condition and performance.

When you buy a boxed Intel Pentium 4 Processor, the package
includes the heatsink, fan, and retention mechanism.

In case you buy a CPU separately, make sure that you use only Intel
certified heatsink and fan.

Follow these steps to install the CPU heatsink and fan.

1. Place the heatsink on top of the installed CPU, making sure that the
heatsink fits properly on the retention module base.

The retention module base is already installed on the motherboard
upon purchase.

You do not have to remove the retention module base when installing
the CPU or installing other motherboard components.

CPU Heatsink

Retention Module Base

Your boxed Intel Pentium 4 Processor package should come with
installation instructions for the CPU, heatsink, and the retention
mechanism. If the instructions in this section do not match the CPU
documentation, follow the latter.

ASUS P4B533 motherboard user guide

2-7

2. Position the fan with the retention mechanism on top of the heatsink.
Align and snap the four hooks of the retention mechanism to the holes
on each corner of the module base.

Make sure that the fan and retention mechanism assembly perfectly
fits the heatsink and module base, otherwise you cannot snap the
hooks into the holes.

Retention Hole

Retention Lock

2-8

Retention Hook Snapped
to the Retention Hole

Keep the retention locks lifted upward while fitting the retention
mechanism to the module base.

Chapter 2: Hardware information

3. Push down the locks on the retention mechanism to secure the
heatsink and fan to the module base.

When secure, the retention locks should point to opposite directions.

2.4.4 Connecting the CPU fan cable

When the fan, heatsink, and the retention mechanism are in place,
connect the CPU fan cable to the connector on the motherboard labeled
CPU_FAN.

CPU Fan Connector

(CPU_FAN)

Don’t forget to connect the CPU fan connector! Hardware monitoring
errors may occur if you fail to plug this connector.

ASUS P4B533 motherboard user guide

2-9

2.5 System memory

2.5.1 Overview

The motherboard comes with three Double Data Rate (DDR) Dual Inline
Memory Module (DIMM) sockets. These sockets support up to 2GB
system memory using 184-pin unbuffered ECC or non-ECC PC2100/1600
DIMMs.

80 Pins

®

P4B533

104 Pins

P4B533 184-Pin DDR DIMM Sockets

A DDR DIMM is keyed with a notch so that it fits in only one direction.
DO NOT force a DIMM into a socket to avoid damaging the DIMM.

The DDR SDRAM technology evolved from the mainstream PC66, PC100,
PC133 memory known as Single Data Rate (SDR) SDRAM. DDR memory
however, has the ability to perform two data operations in one clock cycle,
thus providing twice the throughput of SDR memory. For example, a
200MHz DDR DIMM will support a 100MHz memory bus, and a 266MHz
DDR DIMM will support a 133MHz memory bus.

DDR Data Transfer Rate DDR Base Frequency

266MHz 133MHz
200MHz 100MHz

A DDR DIMM has the same physical dimensions as an SDR DIMM, but it
has a 184-pin footprint compared to the 168-pin of the SDR DIMM. Also, a
DDR DIMM is single notched while an SDR DIMM is double notched.
Therefore, a DDR DIMM is not backward compatible with SDR, and should
be installed only in a socket specially designed for DDR DIMMs.

2-10

Chapter 2: Hardware information

2.5.2 Memory configurations

You may install any DDR DIMMs with 64MB, 128MB, 256MB, 512MB, and
1GB densities into the DIMM sockets.

Use only the following combinations to install DDR DIMMs. Otherwise,
the system may not boot up.

DDR DIMM1 DDR DIMM2 DDR DIMM3

(Rows 0&1) (Rows 2&3) (Rows 3&2)
SS/DS DS None

SS/DS SS SS

* SS - Single-sided DIMM

DS - Double-sided DIMM

DDR DIMM sockets 2 and 3 share the same rows, so if you install a
double-sided DIMM into DIMM2 socket, you must leave DIMM3 socket
empty. However, you may install single-sided DIMMs into DIMM2 and
DIMM3 sockets at the same time.

2.5.3 Installing a DIMM

Make sure to unplug the power supply before adding or removing
DIMMs or other system components. Failure to do so may cause
severe damage to both the motherboard and the components.

Follow these steps to install a DIMM.

1. Unlock a DIMM socket by pressing the retaining clips outward.

2. Align a DIMM on the socket such that the notch on the DIMM matches
the break on the socket.

ASUS P4B533 motherboard user guide

Unlocked Retaining Clip

2-11

3. Firmly insert the DIMM into the socket until the retaining clips snap
back in place and the DIMM is properly seated.

Locked Retaining Clip

2.5.4 Removing a DIMM

Follow these steps to remove a DIMM.

1. Simultaneously press the retaining clips outward to unlock the DIMM.

Support the DIMM lightly with your fingers when pressing the retaining
clips. The DIMM might get damaged when it flips out with extra force.

2. Remove the DIMM from the socket.

2-12

Chapter 2: Hardware information

2.6 Expansion slots

In the future, you may need to install expansion cards. The motherboard
has six PCI slots and one Accelerated Graphics Port (AGP) slot. The
following sub-sections describe the slots and the expansion cards that
they support.

Make sure to unplug the power cord before adding or removing
expansion cards. Failure to do so may cause you physical injury and
damage motherboard components.

2.6.1 Installing an expansion card

Follow these steps to install an expansion card.

1. Before installing the expansion card, read the documentation that
came with it and make the necessary hardware settings for the card.

2. Remove the system unit cover (if your motherboard is already installed
in a chassis).

3. Remove the bracket opposite the slot that you intend to use. Keep the
screw for later use.

4. Align the card connector with the slot and press firmly until the card is
completely seated on the slot.

5. Secure the card to the chassis with the screw you removed earlier.

6. Replace the system cover.

2.6.2 Configuring an expansion card

After installing the expansion card, configure the it by adjusting the
software settings.

1. Turn on the system and change the necessary BIOS settings, if any.
See Chapter 4 for information on BIOS setup.

2. Assign an IRQ to the card. Refer to the tables on the next page.

3. Install the software drivers for the expansion card.

ASUS P4B533 motherboard user guide

2-13

Standard Interrupt Assignments

IRQ Priority Standard Function

0 1 System Timer
1 2 Keyboard Controller
2 N/A Programmable Interrupt
3* 11 Communications Port (COM2)
4* 12 Communications Port (COM1)
5* 13 Sound Card (sometimes LPT2)
6 14 Floppy Disk Controller
7* 15 Printer Port (LPT1)
8 3 System CMOS/Real Time Clock
9* 4 ACPI Mode when used
10* 5 IRQ Holder for PCI Steering
11* 6 IRQ Holder for PCI Steering
12* 7 PS/2 Compatible Mouse Port
13 8 Numeric Data Processor
14* 9 Primary IDE Channel
15* 10 Secondary IDE Channel

* These IRQs are usually available for ISA or PCI devices.

IRQ assignments for this motherboard

ABCDEFGH

PCI slot 1 — — — — — shared — —
PCI slot 2 — — — — — — used —
PCI slot 3 — — — — — — — shared
PCI slot 4 — — — — used — — —
PCI slot 5 — — — — — shared — —
PCI slot 6 — — shared — — — — —
AGP slot shared — — — — — — —
Onboard USB controller HC0 shared — — — — — — —
Onboard USB controller HC1 — — — used — — — —
Onboard USB controller HC2 — — shared — — — — —
Onboard USB 2.0 controller — — — — — — — shared
Onboard Audio — — — — — shared — —

When using PCI cards on shared slots, ensure that the drivers support
“Share IRQ” or that the cards do not need IRQ assignments.
Otherwise, conflicts will arise between the two PCI groups, making the
system unstable and the card inoperable.

2-14

Chapter 2: Hardware information

2.6.3 PCI slots

There are six 32-bit PCI slots in this motherboard. The slots support PCI
cards such as a LAN card, SCSI card, USB card, and other cards that
comply with PCI specifications. The following figure shows a LAN card
installed on a PCI slot.

2.6.4 AGP slot

This motherboard has an Accelerated Graphics Port (AGP) slot that
supports +1.5V AGP cards. When you buy an AGP card, make sure that
you ask for one with +1.5V specification. Note the notches on the card
golden fingers to ensure that they fit the AGP slot on your motherboard.

If you installed an incorrect AGP card, such as a SiS305-based AGP card
or any other 3.3V AGP card, the onboard red LED (AGP_WARN) lights up,
an indication that the card is not supported on the motherboard. As long as
this LED is lighted, you cannot turn on the system power even if you press
the power button, thus preventing permanent damage to the motherboard.

Install only 1.5V AGP cards on this motherboard!

®

P4B533

P4B533 Accelerated Graphics Port (AGP)

ASUS P4B533 motherboard user guide

Keyed for 1.5v

2-15

2.7 Switches and jumpers

The motherboard frequency is adjusted through the DIP switches. The
white block represents the switch position. The illustration below shows all
the switches in the OFF position.

DSW1

1.Frequency Selection

6

2.Frequency Selection

3.Frequency Selection

4.Frequency Selection

12345

ON

5.Frequency Selection

6.Frequency Selection

®

P4B533

ON

OFF

P4B533 DIP Switches

ON

DSW2

ON

1234

OFF

1.Frequency Multiple

2.Frequency Multiple

3.Frequency Multiple

4.Frequency Multiple

The JEN jumper must be set to pins 2-3 (jumper mode) if you wish to
use the DIP switches. Otherwise, setting the switches does not
produce any effect.

1. JumperFree™ mode (JEN)

This jumper allows you to enable or disable the JumperFree™ mode.
The JumperFree mode allows you to change CPU settings through the
BIOS setup instead of using the DIP switches.

®

P4B533

P4B533
JumperFree™ Mode Setting

The JEN jumper is set in conjunction with the DIP switches. In
JumperFree mode, set all the DIP switches to OFF.

JEN

ON

ON

1234

6

12345

DSW1

DSW2

12

23

Jumper Free

(Default)

Jumper Mode

2-16

Chapter 2: Hardware information

2. CPU Core:Bus frequency multiple (DSW2 Switches 1-4)

This option sets the frequency multiple between the CPU internal and
external frequencies. This must be set in conjunction with the CPU Bus
Frequency.

®

P4B533

P4B533 CPU Frequency
Multiple Selection

Make sure that the JEN jumper is set to jumper mode before setting
the above switches.

The option to set the CPU core:bus frequency multiple is available only
on unlocked CPUs. If you are using a locked CPU, setting the switches
does not produce any effect.

DSW2

ON

1234

8.0x

ON

1234

13.0x

ON

1234

17.0x

ON

1234

21.0x

ON

1234

10.0x

ON

1234

14.0x

ON

1234

18.0x

ON

1234

22.0x

ON

1234

11.0x

ON

1234

15.0x

ON

1234

19.0x

ON

1234

23.0x

ON

1234

12.0x

ON

1234

16.0x

ON

1234

20.0x

ON

1234

24.0x

ASUS P4B533 motherboard user guide

2-17

3. CPU external frequency selection (DSW1 Switches 1-6)

This option tells the clock generator what frequency to send the CPU.
This allows the selection of the CPU’s external frequency (or Bus
Clock). The BUS Clock multiplied by the Frequency Multiple equals the
CPU’s internal frequency (the advertised CPU speed).

To select the CPU external frequency using the DIP switches, ensure
that the JEN jumper is set to jumper mode.

DSW1

®

P4B533

P4B533 CPU
External Frequency Selection

Set the CPU frequency only to the recommended settings.
Frequencies other than the recommended CPU bus frequencies are
not guaranteed to be stable.

CPU
AGP
PCI

CPU
AGP
PCI

ON

100MHz

66MHz
33MHz

ON

141MHz

70MHz
35MHz

6

12345

6

12345

ON

105MHz

70MHz
35MHz

ON

145MHz

72MHz
36MHz

6

12345

6

12345

ON

109MHz

72MHz
36MHz

ON

166MHz

66MHz
33MHz

6

12345

6

12345

ON

133MHz

66MHz
33MHz

ON

200MHz

66MHz
33MHz

6

12345

6

12345

2-18

Chapter 2: Hardware information

4. Keyboard power (3-pin KBPWR)

This jumper allows you to enable or disable the keyboard wake-up
feature. Set this jumper to pins 2-3 (+5VSB) if you wish to wake up the
computer when you press a key on the keyboard (the default is the
Space Bar). This feature requires an ATX power supply that can supply
at least 1A on the +5VSB lead, and a corresponding setting in the
BIOS (see section 4.5.1 Power Up Control).

KBPWR

3

®

P4B533

(Default)

P4B533 Keyboard Power Setting

2
1

+5V

2

+5VSB

5. VCORE over-voltage (3-pin OVER_VOLT)

When enabled, this jumper allows CPU Vcore ranges of 1.5V to 1.8V
for Pentium 4 Northwood CPU and 1.75V to 1.95V for Pentium 4
Willamette CPU.

When this jumper is disabled, Northwood has a Vcore setting range of
+1.5V to +1.7V, and Willamette has 1.75V to 1.85V. You may adjust the
CPU VCore through the BIOS Setup.

Setting to a very high core voltage may cause permanent damage to
the CPU. It is recommended that you keep the default setting
(Disable).

OVER_VOLT

3

2
1

®

P4B533

Disable

(Default)

2

Enable

P4B533 OVER_VOLT Setting

ASUS P4B533 motherboard user guide

2-19

6. USB device wake-up (3-pin USBPWR_12, USBPWR_34,
USBPWR_56)

Set these jumpers to +5V to wake up the computer from S1 sleep
mode (CPU stopped, DRAM refreshed, system running in low power
mode) using the connected USB devices. Set to +5VSB to wake up
from S3 sleep mode (no power to CPU, DRAM in slow refresh, power
supply in reduced power mode). Both jumpers are set to pins 1-2 (+5V)
by default because not all computers have the appropriate power
supply to support this feature.

The USBPWR_12 and USBPWR_34 jumpers are for the rear USB
ports. The USBPWR_56 jumper is for the internal USB header that you
can connect to the front USB ports.

1. This feature requires a power supply that can provide at least 1A
on the +5VSB lead when these jumpers are set to +5VSB.
Otherwise, the system does not power up.

2. The total current consumed must NOT exceed the power supply
capability (+5VSB) whether under normal condition or in sleep
mode.

®

P4B533

P4B533 USB Device Wake Up

USBPWR_34

2
1

+5V

(Default)

+5VSB

USBPWR_12

2

1

+5V

(Default)

2

+5VSB

USBPWR_56

12 23

+5VSB+5V

(Default)

3
2

3

2-20

Chapter 2: Hardware information

7. Speaker selector (3-pin SPEECH)

This jumper allows you to select the speaker you wish to use for the
ASUS POST Reporter™ function. Set to pins 1-2 to use an external
speaker. Connect the speakers to the Line Out jack (lime colored) on
the rear panel. Set to pins 2-3 to use an internal speaker (usually built
in the chassis).

SPEECH

®

P4B533

12

LINEOUT BUZZER

(Default)

3

2

P4B533 Speaker Selector

8. SMBus 2.0 setting (two 3-pin PCISMB_SW1, PCISMB_SW2)

These jumpers allow you to enable or disable the SMBus 2.0 support
on the motherboard. When these jumpers are set to pins 2-3 (Enable),
you may install PCI devices that comply with SMBus 2.0 specification.

PCISMB_SW1

®

PCISMB_SW2

P4B533

P4B533 PCISMB Setting

12

Disable

(Default)

ASUS P4B533 motherboard user guide

2

Enable

3

2-21

9. Line out selector (two 2-pin FP_LO_SWL, FP_LO_SWR)

(on audio models only)

By default, these jumpers are shorted (jumper caps on) to route the
signal from the audio controller to the rear panel Line Out jack to make
it available for audio out devices such as speakers or a headphone.

If you connect the Intel Front Panel audio cable to the FP_AUDIO
connector (see page 2-33 for the location), remove the caps from
these jumpers to allow automatic switching of audio signal between the
rear panel Line Out jack and the audio cable.

®

P4B533

FP_LO_SWL

FP_LO_SWR

BLOL
FLOL
BLOR
FLOR

P4B533 Internal Line Out Connectors

10.Bass/Center setting (3-pin BCS1, BCS2)

(on audio models only)

These jumpers allow you to select the speaker output for a 6-channel
audio system. Switch the jumpers from the CENTER/BASS (pins 1-2)
position to BASS/CENTER (pins 2-3) position to re-route signals on the
internal leads of the Mic port.

Use the audio driver included in the support CD to install the multi­channel audio feature. See section “5.3 Software information.”

2-22

®

P4B533

P4B533 Bass Center Setting

BCS1
BCS2

12

(Default)

23

(BASS/CENTER)(CENTER/BASS)

Chapter 2: Hardware information

11. Audio CODEC setting (3-pin AUDIO_SW)

(on audio models only)

This jumper allows you to enable or disable the audio CODEC on the
motherboard.

Disable the onboard audio CODEC if you desire to install a PCI audio
card into a PCI slot.

AUDIO_SW

®

P4B533

P4B533 Audio CODEC Setting

12

Enable

(Default)

23

Disable

12.Clear RTC RAM (CLRTC)

This jumper allows you to clear the Real Time Clock (RTC) RAM in
CMOS. You can clear the CMOS memory of date, time, and system
setup parameters by erasing the CMOS RTC RAM data. The RAM
data in CMOS, that include system setup information such as system
passwords, is powered by the onboard button cell battery.

To erase the RTC RAM:

1. Turn OFF the computer and unplug the power cord.

2. Remove the battery.

3. Place a jumper cap over the CLRTC jumper for about 5 seconds,
then remove the cap. DON”T leave the cap on the jumper!

4. Re-install the battery.

5. Plug the power cord and turn ON the computer.

6. Hold down the <Del> key during the boot process and enter BIOS
setup to re-enter data.

Intel I/O

Controller

Hub

(ICH4)

®

P4B533

P4B533 Clear RTC RAM

CLRTC

Short Jumper

to Clear CMOS

ASUS P4B533 motherboard user guide

2-23

2.8 Connectors

This section describes and illustrates the internal connectors on the
motherboard.

Always connect ribbon cables with the red stripe to Pin 1 on the
connectors. Pin 1 is usually on the side closest to the power connector
on hard drives and CD-ROM drives, but may be on the opposite side
on floppy disk drives.

1. Hard disk activity LED (2-pin IDE_LED)

This connector supplies power to the hard disk activity LED. The read
or write activities of any device connected to the primary or secondary
IDE connector cause this LED to light up.

TIP: If the case-mounted LED does not

®

P4B533

P4B533 HD Activity LED

light, try reversing the 2-pin plug.

IDE_LED

2. Floppy disk drive connector (34-1 pin FLOPPY)

This connector supports the provided floppy drive ribbon cable. After
connecting one end to the motherboard, connect the other end to the
floppy drive. (Pin 5 is removed to prevent incorrect insertion when
using ribbon cables with pin 5 plug).

FLOPPY

PIN 1

2-24

®

P4B533

P4B533 Floppy Disk Drive Connector

NOTE: Orient the red markings on

the floppy ribbon cable to PIN 1.

Chapter 2: Hardware information

3. IDE connectors (two 40-1 pin PRI_IDE/SEC_IDE)

This connector supports the provided UltraDMA/100/66 IDE hard disk
ribbon cable. Connect the cable’s blue connector to the primary
(recommended) or secondary IDE connector, then connect the gray
connector to the UltraDMA/100/66 slave device (hard disk drive) and
the black connector to the UltraDMA/100/66 master device. It is
recommended that you connect non-UltraDMA/100/66 devices to the
secondary IDE connector. If you install two hard disks, you must
configure the second drive as a slave device by setting its jumper
accordingly. Refer to the hard disk documentation for the jumper
settings. BIOS supports specific device bootup. If you have more than
two UltraDMA/100/66 devices, purchase another UltraDMA/100/66
cable. You may configure two hard disks to be both master devices
with two ribbon cables – one for the primary IDE connector and
another for the secondary IDE connector.

1. Pin 20 on each IDE connector is removed to match the covered
hole on the UltraDMA cable connector. This prevents incorrect
orientation when you connect the cables.

2. The hole near the blue connector on the UltraDMA/100/66 cable is
intentional.

®

P4B533

P4B533 IDE Connectors

For UltraDMA/100/66 IDE devices, use an 80-conductor IDE cable. The
UltraDMA/66 cable included in the motherboard package also supports
UltraDMA/100.

PIN 1

PIN 1

NOTE: Orient the red markings
(usually zigzag) on the IDE
ribbon cable to PIN 1.

SEC_IDE Connector

PRI_IDE Connector

ASUS P4B533 motherboard user guide

2-25

4. Chassis open alarm lead (4-1 pin CHASSIS)

This lead is for a chassis designed with intrusion detection feature.
This requires an external detection mechanism such as a chassis
intrusion sensor or microswitch. When you remove any chassis
component, the sensor triggers and sends a high-level signal to this
lead to record a chassis intrusion event.

If you do not wish to use the chassis intrusion lead, place a jumper cap
over the pins labeled “Chassis Signal” and “Ground” to close the
circuit.

CHASSIS

®

P4B533

+5VSB_MB

Chassis Signal

GND

P4B533 Chassis Alarm Lead

5. SMBus connector (6-1 pin SMB)

This connector allows you to connect SMBus (System Management
Bus) devices. Devices communicate with an SMBus host and/or other
SMBus devices using the SMBus interface. SMBus is a specific

2

implementation of an I

C bus, a multi-device bus that allows multiple
chips to connect to the same bus and enable each one to act as a
master by initiating data transfer.

2-26

®

P4B533

P4B533 SMBus Connector

SMB

1

+3V

Ground

SMBCLK

FLOATING

SMBDATA

Chapter 2: Hardware information

6. ASUS EZ Plug™ and ATX power connectors
(20-pin ATXPWR, 4-pin EZ_PLUG, 4-pin ATX12V)

These connectors connect to an ATX 12V power supply . The plug s from
the power supply are designed to fit these connectors in only one
orientation. Find the proper orientation and push down firmly until the
connectors completely fit.

In addition to the 20-pin ATXPWR connector, this motherboard requires
that you connect the 4-pin ATX +12V power plug to provide sufficient
power to the CPU.

If you are using a standard ATX power supply that does not have the
ATX +12V plug, connect one 4-pin device power plug to the ASUS EZ
Plug™ connector labeled EZ_PLUG.

Make sure that your ATX 12V power supply can provide 8A on the
+12V lead and at least 1A on the +5-volt standby lead (+5VSB). The
minimum recommended wattage is 230W, or 300W for a fully
configured system. The system may become unstable and may
experience difficulty powering up if the power supply is inadequate.

ATXPWR

Pin 1

+12.0VDC

+5VSB

PWR_OK

COM

+5.0VDC

®

P4B533

COM

+5.0VDC

COM
+3.3VDC
+3.3VDC

P4B533 ATX & Auxiliary Power Connectors

+5.0VDC
+5.0VDC

-5.0VDC
COM
COM
COM
PS_ON#
COM

-12.0VDC
+3.3VDC

EZ_PLUG

+5V
GND
GND

+12V

ATX12V

+12V DC GND

+12V DC GND

ASUS P4B533 motherboard user guide

2-27

7. CPU, Chassis, and Power Fan Connectors
(3-pin CPU_FAN, PWR_FAN, CHA_FAN)

The fan connectors support cooling fans of 350mA~740mA (8.88W
max.) or a total of 1A~2.22A (26.64W max.) at +12V. Connect the fan
cables to the fan connectors on the motherboard, making sure that the
black wire of each cable matches the ground pin of the connector.

Do not forget to connect the fan cables to the fan connectors. Lack of
sufficient air flow within the system may damage the motherboard
components. These are not jumpers! DO NOT place jumper caps on
the fan connectors!

CPU_FAN

GND

Rotation

+12V

PWRFAN

GND

Rotation

®

+12V

P4B533

CHA_FAN

GND

Rotation

+12V

P4B533 12-Volt Fan Connectors

8. Power supply thermal connector (2-pin TRPWR)

If your power supply has a thermal monitoring feature, connect its
thermal sensor cable to this connector.

®

P4B533

TRPWR

Ground
TRPWR

2-28

P4B533 Power Supply Thermal Connector

Chapter 2: Hardware information

9. USB header (10-1 pin USB20_56)

If the USB ports on the rear panel are inadequate, a USB header is
available for additional USB ports. The USB header complies with USB

2.0 specification that supports up to 480 Mbps connection speed. This
speed advantage over the conventional 12 Mbps on USB 1.1 allows
faster Internet connection, interactive gaming, and simultaneous
running of high-speed peripherals.

If your package came with a USB 2.0/GAME module, connect the USB
cable to this header. The module has two USB 2.0 ports that support
the next generation USB peripherals such as high resolution cameras,
scanners, and printers.

Download the USB 2.0 driver from the Microsoft website
(www.microsoft.com). You must install the driver before you can use
the USB 2.0 capability.

®

GND

LDP6

LDM6

P4B533

USB+5V

610

USB20_56

15

NC

GND

LDP5

P4B533 USB 2.0 Header

10.Smart Card Reader connector (14-1 pin SMARTCON)

LDM5

USB+5V

(optional)

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.

SMARTCON

®

SCRUI

P4B533

NC

NC

NC

SCRREST

SCRRES#

1

VCC

P4B533 Smartcard

NC

SCRFET#

NC

SCRCLK

GND

ASUS P4B533 motherboard user guide

NC

2-29

11. Infrared module connector (two 5-1 pin IR)

This connector supports an optional wireless transmitting and receiving
infrared module. This module mounts to a small opening on system
chassis that support this feature. You must also configure the UART2
Use As parameter in BIOS to set UART2 for use with IR. See section
“4.4.2 I/O Device Configuration” for details.

Use the five pins as shown in Back View and connect a ribbon cable
from the module to the motherboard SIR connector according to the
pin definitions.

IR

Front View Back View

+5V

GND

IRTX

(NC)

IRRX

®

P4B533

1

IRTX
GND

+5V
(NC)

IRRX

P4B533 Infrared Module Connector

12.GAME/MIDI connector (16-1 pin GAME)

This connector supports a GAME/MIDI module. If your package came
with the optional USB 2.0/GAME module, connect the GAME/MIDI
cable to this connector. The GAME/MIDI port on the module connects
a joystick or a game pad for playing games, and MIDI devices for
playing or editing audio files.

2-30

®

P4B533

P4B533 Game Connector

GAME

GND

GND

+5V

J1CY

J1CX

16

J1B2

8

MIDI_IN

J2B2

J2CY

J1B1

+5V

1

9

+5V

J2B1

J2CX

MIDI_OUT

Chapter 2: Hardware information

13.Internal audio connectors (4-pin CD1, AUX, MODEM)

(on audio models only)

These connectors allow you to receive stereo audio input from sound
sources such as a CD-ROM, TV tuner, or MPEG card. The MODEM
connector allows the onboard audio to interface with a voice modem
card with a similar connector. It also allows the sharing of mono_in
(such as a phone) and a mono_out (such as a speaker) between the
audio and a voice modem card.

CD(Black)AUX (White)

Left Audio Channel

®

P4B533

P4B533 Internal Audio Connectors

MODEM

Modem-Out
Ground
Ground
Modem-In

Ground
Ground
Right Audio Channel

14.Line in connector (5-pin FP_LINE_IN)

(on audio models only)

This connector is for a front panel Line In jack with a return path for
automatic signal switching. By default, pins 1-2 and pins 3-4 are
shorted with jumper caps to make the Line In source available from the
rear panel Line In jack. Remove the jumper caps if you desire to install
the Intel front panel audio cable.

FP_LINE_IN

AGND

BLINE_LIN_L

ALINE_LIN_L

®

P4B533

P4B533 LINE_IN Connector

BLINE_IN_R

LINE_IN_R

ASUS P4B533 motherboard user guide

2-31

15.ASUS iPanel connector (24-1 pin AFPANEL)

(optional)

This connector allows you to connect an optional ASUS iPanel, an
easy-to-access drive bay with front I/O ports and status LEDs. If you
are not using an ASUS iPanel, you can connect an optional wireless
transmitting and receiving infrared module to the SIR connector.

AFPANEL

+5 V

NC

GND

®

P4B533

P4B533 iPanel Connector

SIR

CIR

+5 V

NC

GND

IR_CON

16.Digital audio connector (6-1 pin SPDIF_C)

SMBDATA

GND

IRTX

CIRRX

+5VSB

GND

IRTX

CIRRX

+5VSB

+3VSB

EXTSMI#

CHASSIS#

IRRX

NC

IRRX

NC

(on audio models only)

NCNCNC

+5V SMBCLK

MLED-

PCIRST#

NC

BATT

NC

This connector is for the bundled S/PDIF audio module that allows
digital instead of analog sound output. Connect one end of the audio
cable to the S/PDIF In/Out connector on the motherboard, and the
other end to the S/PDIF module.

2-32

SPDIF_C

®

P4B533

GND

GND

P4B533 Digital Audio Connector

SPDIF_OUT
+5V
SPDIF_IN

1

Chapter 2: Hardware information

17.Front panel audio connector (10-1 pin FP_AUDIO)

(on audio models only)

This is an interface for the Intel front panel audio cable that allow
convenient connection and control of audio devices.

Make sure to remove the caps from the FP_LO_SWL and
FP_LO_SWR jumpers if you installed the Intel front panel audio cable.
Refer to page 2-22 for the location of the jumpers.

FP_AUDIO

®

P4B533

BLINE_OUT_L

BLINE_OUT_R

AGND

Line out_L
NC
Line out_R
MICPWR+5VA
MIC2

P4B533 Front Panel Audio Connector

18.System panel connector (20-pin PANEL)

This connector accommodates several system front panel functions.

PLED

MLED

Keylock

Ground

Ground

ExtSMI#

Speaker
Connector

Speaker

Ground

+5V

Ground

Reset

Ground

Ground

PWRBIN

Reset SW

ATX Power
Switch*

®

P4B533

P4B533 System Panel Connectors

Keyboard Lock
Power LED

+5 V

+5 V

Message LED

SMI Lead

* Requires an ATX power supply.

ASUS P4B533 motherboard user guide

2-33

• System Power LED Lead (3-1 pin PLED)

This 3-1 pin connector connects to the system power LED. The LED
lights up when you turn on the system power, and blinks when the
system is in sleep mode.

• Keyboard Lock Lead (2-pin KEYLOCK)

This 2-pin connector connects to a chassis-mounted switch to allow
the use of the keyboard lock feature.

• System Warning Speaker Lead (4-pin SPEAKER)

This 4-pin connector connects to the case-mounted speaker and
allows you to hear system beeps and warnings.

• System Message LED Lead (2-pin MLED)

This 2-pin connector is for the system message LED that indicates
receipt of messages from a fax/modem. The normal status for this LED
is ON, when there is no incoming data signal. The LED blinks when
data is received. The system message LED feature requires an ACPI
OS and driver support.

• System Management Interrupt Lead (2-pin SMI)

This 2-pin connector allows you to manually place the system into a
suspend mode, or “green” mode, where system activity is instantly
decreased to save power and to expand the life of certain system
components. Attach the case-mounted suspend switch to this 2-pin
connector.

• ATX Power Switch / Soft-Off Switch Lead (2-pin PWRBTN)

This connector connects a switch that controls the system power.
Pressing the power switch turns the system between ON and SLEEP,
or ON and SOFT OFF, depending on the BIOS or OS settings.
Pressing the power switch while in the ON mode for more than 4
seconds turns the system OFF.

• Reset Switch Lead (2-pin RESET)

This 2-pin connector connects to the case-mounted reset switch for
rebooting the system without turning off the system power.

2-34

Chapter 2: Hardware information

Chapter 3

This chapter describes the power up
sequence and gives information on the
BIOS beep codes.

Powering up

Chapter summary

3.1 Starting up for the first time.......................... 3-1

3.2 Vocal POST Messages................................... 3-2

3.3 Powering off the computer ........................... 3-4

ASUS P4B533 motherboard

3.1 Starting up for the first time

1. After making all the connections, replace the system case cover.

2. Be sure that all switches are off.

3. Connect the power cord to the power connector at the back of the system
chassis.

4. Connect the power cord to a power outlet that is equipped with a surge
protector .

5. Turn on the devices in the following order:
a. Monitor
b. External SCSI devices (starting with the last device on the chain)
c. System power (if you are using an ATX power supply , you need to

switch on the power supply as well as press the ATX power switch on
the front of the chassis).

6. After applying power, the power LED on the system front panel case lights
up. For ATX power supplies, the system LED lights up when you press the
ATX power switch. If your monitor complies with “green” standards or if it
has a “power standby” feature, the monitor LED may light up or switch
between orange and green after the system LED turns on. The system
then runs the power-on tests. While the tests are running, the BIOS beeps
or additional messages appear on the screen. If you do not see anything
within 30 seconds from the time you turned on the power , the system may
have failed a power-on test. Check the jumper settings and connections or
call your retailer for assistance.

Award BIOS Beep Codes

Beep Meaning

One short beep when No error during POST
displaying logo

Long beeps in an endless loop No DRAM installed or detected
One long beep followed by Video card not found or video card

three short beeps memory bad
High frequency beeps when CPU overheated;

system is working System running at a lower frequency

You will not hear the BIOS beeps when the ASUS POST Reporter™ is
enabled. You will hear the vocal POST messages instead.

7. At power on, hold down <Delete> to enter BIOS Setup. Follow the
instructions in Chapter 4.

ASUS P4B533 motherboard user guide

3-1

3.2 Vocal POST Messages

This motherboard includes the Winbond speech controller to support a
special feature called the ASUS POST Reporter™. This feature gives you
vocal POST messages and alerts to inform you of system events and boot
status. In case of a boot failure, you will hear the specific cause of the
problem.

These POST messages are customizable using the Winbond Voice Editor
software that came with your package. You can record your own
messages to replace the default messages.

Following is a list of the default POST messages and their corresponding
actions, if any.

POST Message Action

No CPU installed • Install an Intel Pentium 4 Processor

into the CPU socket.

System failed CPU test • Check the CPU if properly installed.

• Call ASUS technical support for
assistance. See the “ASUS contact
information” on page x.

System failed memory test • Install 184-pin unbuffered

PC2100/1600 DIMMs into the DIMM
sockets.

• Check if the DIMMs on the DIMM
sockets are properly installed.

• Make sure that your DIMMs are
not defective.

• Refer to section “2.5 System
memory” for instruction on installing
a DIMM.

System failed VGA test • Install a PCI VGA card into one of

the PCI slots, or a 1.5V AGP card
into the AGP slot.

• Make sure that your VGA/AGP card
is not defective.

System failed due to CPU • In JumperFree mode, check your
over-clocking CPU settings in BIOS and make

sure you only set to the recom­mended settings. See section “4.4
Advanced menu.”

• In jumper mode, refer to section
“2.7 Switches and jumpers.”

3-2

Chapter 3: Powering up

POST Message Action

No keyboard detected • Check your keyboard if properly

connected to the purple PS/2
connector on the rear panel.

• See section “1.4.1 Major
components” for the location of the
connector.

No floppy disk detected • Make sure you have connected a

floppy disk to the floppy disk
connector on the motherboard.

• See section “2.8 Connectors.”

No IDE hard disk detected • Make sure you have connected an

IDE hard disk drive to the one of the
IDE connectors on the motherboard.

• See section “2.8 Connectors.”

CPU temperature too high • Check CPU fan if working properly.
CPU fan failed • Check the CPU fan and make sure

it turns on after you applied power
to the system.

CPU voltage out of range • Check your power supply and

make sure it is not defective.

• Call ASUS technical support for
assistance. See the “ASUS contact
information” on page x.

System completed Power-On Self Test • No action required
Computer now booting from operating • No action required

system

You may disable the ASUS POST Reporter™ in the BIOS setup. See
section “4.4.2 I/O Device Configuration”.

ASUS P4B533 motherboard user guide

3-3

3.3 Powering off the computer

You must first exit the operating system and shut down the system before
switching off the power. For ATX power supplies, you can press the ATX
power switch after exiting or shutting down the operating system. If you
use Windows 95/98/2000/XP, click the Start button, click Shut Down, then
click the OK button to shut down the computer. The power supply should
turn off after Windows shuts down.

The message “You can now safely turn off your computer” does not
appear when shutting down with ATX power supplies.

3-4

Chapter 3: Powering up

Chapter 4

This chapter tells how to change system
settings through the BIOS Setup menus.
Detailed descriptions of the BIOS
parameters are also provided.

BIOS setup

Chapter summary

4.1 Managing and updating your BIOS .............. 4-1

4.2 BIOS Setup program...................................... 4-7

4.3 Main Menu .................................................... 4-10

4.4 Advanced Menu ........................................... 4-17

4.5 Power Menu.................................................. 4-28

4.6 Boot Menu .................................................... 4-34

4.7 Exit Menu ...................................................... 4-36

ASUS P4B533 motherboard

4.1 Managing and updating your BIOS

It is recommended that you save a copy of the motherboard’s original
BIOS to a bootable floppy disk in case you need to reinstall the original

BIOS later.

4.1.1 Using ASUS EZ Flash to update the BIOS

The ASUS EZ Flash feature allows you to easily update the BIOS without
having to go through the long process of booting from a diskette and using
a DOS-based utility. The EZ Flash is built-in the BIOS firmware so it is
accessible by simply pressing <Alt> + <F2> right after the Power-On Self
Tests (POST).

Follow these steps to update the BIOS using ASUS EZ Flash.

1. Download the latest BIOS file from the ASUS website (see ASUS
contact information on page x). Save the file to a floppy disk.

Write down the BIOS file name on a piece of paper. You need to type
the exact BIOS file name at the EZ Flash screen.

2. Reboot the computer.

3. To use EZ Flash, press <Alt> + <F2> right after POST to display the
following screen.

ASUS EZ Flash V1.00

Copyright (C) 2002, ASUSTeK COMPUTER INC.

[Onboard BIOS Information]
BIOS Version : ASUS P4B533 ACPI BIOS Revision 1002
BIOS Model : P4B533
BIOS Built Date : 04/16/02

Please Enter File Name for NEW BIOS: _
*Note: EZ Flash will copy file from A:\, Press [ESC] to reboot

The BIOS information in the above screen is for reference only. What
you see on your screen may not be exactly the same as shown.

4. Insert the disk that contains the new BIOS file into the floppy drive. You
will receive the error message, “WARNING! Device not ready.” if you
proceed to step 5 without the disk in the drive.

ASUS P4B533 motherboard user guide

4-1

5. At the prompt, “Please Enter File Name for NEW BIOS: _”, type in the
BIOS file name that you downloaded from the ASUS website, then
press <Enter>.

EZ Flash will automatically access drive A to look for the file name that
you typed. When found, the following message appears on screen.

[BIOS Information in File]
BIOS Version: P4B533 Boot Block

WARNING! Continue to update the BIOS (Y/N)? _

If you accidentally typed in a wrong BIOS file name, the error
message, “WARNING! File not found.” appears. Press <Enter> to
remove the message, then type in the correct file name. Press
<Enter>.

6. At the above prompt, type

Y to continue with the update process.

Pressing N exits the EZ Flash screen and reboots the system without
updating the BIOS.

The following prompts appear if you typed Y.

Flash Memory: SST 49LF004

1. Update Main BIOS area (Y/N)? _

2. Update Boot Block area (Y/N)? _

7. Press Y for both items to completely update the main BIOS area and
the boot block area.

DO NOT shutdown or reset the system while updating the BIOS boot
block area! Doing so may cause system boot failure.

8. When the update process is done, the message, “Press a key to

reboot”

appears. Press any key to reboot the system with the new

BIOS.

4-2

Chapter 4: BIOS Setup

4.1.2 Using AFLASH to update the BIOS

Creating a bootable disk

AFLASH.EXE is a Flash Memory Writer utility that updates the BIOS by
uploading a new BIOS file to the programmable flash ROM on the
motherboard. This file works only in DOS mode. To determine the BIOS
version of your motherboard, check the last four numbers of the code
displayed on the upper left-hand corner of your screen during bootup.
Larger numbers represent a newer BIOS file.

1. Type FORMAT A:/S at the DOS prompt to create a bootable system
disk. DO NOT copy AUTOEXEC.BAT and CONFIG.SYS to the disk.

2. Type COPY D:\AFLASH\AFLASH.EXE A:\ (assuming D is your
CD-ROM drive) to copy AFLASH.EXE to the boot disk you created.

AFLASH works only in DOS mode. It does not work in the DOS prompt
within Windows, and does not work with certain memory drivers that
may be loaded when you boot from the hard drive. It is recommended
that you reboot using a floppy disk.

3. Reboot the computer from the floppy disk.

BIOS setup must specify “Floppy” as the first item in the boot
sequence.

4. In DOS mode, type A:\AFLASH <Enter> to run AFLASH.

If the word “unknown” appears after Flash Memory:, the memory chip
is either not programmable or is not supported by the ACPI BIOS and
therefore, cannot be programmed by the Flash Memory Writer utility.

ASUS P4B533 motherboard user guide

4-3

5. Select 1. Save Current BIOS to File from the Main menu and press
<Enter>. The Save Current BIOS To File screen appears.

6. Type a filename and the path, for example, A:\XXX-XX.XXX, then
press <Enter>.

4-4

Chapter 4: BIOS Setup

Updating the BIOS

Update the BIOS only if you have problems with the motherboard and
you are sure that the new BIOS revision will solve your problems.
Careless updating may result to more problems with the motherboard!

1. Download an updated ASUS BIOS file from the Internet (WWW or
FTP) (see ASUS CONTACT INFORMATION on page x for details) and
save to the boot floppy disk you created earlier.

2. Boot from the floppy disk.

3. At the “A:\” prompt, type AFLASH and then press <Enter>.

4. At the Main Menu, type 2 then press <Enter>. The Update BIOS
Including Boot Block and ESCD screen appears.

5. Type the filename of your new BIOS and the path, for example,
A:\XXX-XX.XXX, then press <Enter>.

To cancel this operation, press <Enter>.

6. When prompted to confirm the BIOS update, press Y to start the
update.

ASUS P4B533 motherboard user guide

4-5

7. The utility starts to program the new BIOS information into the Flash
ROM. The boot block is updated automatically only when necessary.
This minimizes the possibility of boot problems in case of update
failures. When the programming is done, the message

Successfully”

appears.

“Flashed

8. Follow the onscreen instructions to continue.

4-6

If you encounter problems while updating the new BIOS, DO NOT turn
off the system because this may cause boot problems. Just repeat the
process, and if the problem persists, load the original BIOS file you
saved to the boot disk. If the Flash Memory Writer utility is not able to
successfully update a complete BIOS file, the system may not boot. If
this happens, call the ASUS service center for support.

Chapter 4: BIOS Setup

4.2 BIOS Setup program

This motherboard supports a programmable EEPROM that you can
update using the provided utility described in section
updating your BIOS.”

Use the BIOS Setup program when you are installing a motherboard,
reconfiguring your system, or prompted to “Run Setup”. This section
explains how to configure your system using this utility.

Even if you are not prompted to use the Setup program, you may want to
change the configuration of your computer in the future. For example, you
may want to enable the security password feature or make changes to the
power management settings. This requires you to reconfigure your system
using the BIOS Setup program so that the computer can recognize these
changes and record them in the CMOS RAM of the EEPROM.

The EEPROM on the motherboard stores the Setup utility. When you start
up the computer, the system provides you with the opportunity to run this
program. Press <Delete> during the Power-On Self Test (POST) to enter
the Setup utility, otherwise, POST continues with its test routines.

“

4.1 Managing and

If you wish to enter Setup after POST, restart the system by pressing
<Ctrl> + <Alt> + <Delete>, or by pressing the reset button on the system
chassis. You can also restart by turning the system off and then back on.
Do this last option only if the first two failed.

The Setup program is designed to make it as easy to use as possible. It is
a menu-driven program, which means you can scroll through the various
sub-menus and make your selections among the predetermined choices.

Because the BIOS software is constantly being updated, the following
BIOS setup screens and descriptions are for reference purposes only,
and may not exactly match what you see on your screen.

ASUS P4B533 motherboard user guide

4-7

4.2.1 BIOS menu bar

The top of the screen has a menu bar with the following selections:
MAIN Use this menu to make changes to the basic system

configuration.

ADVANCED Use this menu to enable and make changes to the

advanced features.

POWER Use this menu to configure and enable Power Management

features.

BOOT Use this menu to configure the default system device used

to locate and load the Operating System.

EXIT Use this menu to exit the current menu or to exit the Setup

program.

To access the menu bar items, press the right or left arrow key on the
keyboard until the desired item is highlighted.

4.2.2 Legend bar

At the bottom of the Setup screen is a legend bar. The keys in the legend
bar allow you to navigate through the various setup menus. The following
table lists the keys found in the legend bar with their corresponding
functions.

Navigation Key(s) Function Description

<F1> or <Alt + H> Displays the General Help screen from any-

where in the BIOS Setup

<Esc> Jumps to the Exit menu or returns to the main

menu from a sub-menu

Left or Right arrow Selects the menu item to the left or right
Up or Down arrow Moves the highlight up or down between fields

- (minus key) Scrolls backward through the values for the

highlighted field

+ (plus key) or spacebar Scrolls forward through the values for the high-

lighted field

<Enter> Brings up a selection menu for the highlighted

field

<Home> or <PgUp> Moves the cursor to the first field
<End> or <PgDn> Moves the cursor to the last field
<F5> Resets the current screen to its Setup Defaults
<F10> Saves changes and exits Setup

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Chapter 4: BIOS Setup

General help

In addition to the Item Specific Help window, the BIOS setup program also
provides a General Help screen. You may launch this screen from any
menu by simply pressing <F1> or the <Alt> + <H> combination. The
General Help screen lists the legend keys and their corresponding
functions.

Saving changes and exiting the Setup program

See “4.7 Exit Menu” for detailed information on saving changes and exiting
the setup program.

Scroll bar

When a scroll bar appears to the right of a help window, it indicates that
there is more information to be displayed that will not fit in the window. Use
<PgUp> and <PgDn> or the up and down arrow keys to scroll through the
entire help document. Press <Home> to display the first page, press
<End> to go to the last page. To exit the help window, press <Enter> or
<Esc>.

Sub-menu

Note that a right pointer symbol (as shown on the
left) appears to the left of certain fields. This pointer
indicates that you can display a sub-menu from this
field. A sub-menu contains additional options for a
field parameter. To display a sub-menu, move the
highlight to the field and press <Enter>. The sub­menu appears. Use the legend keys to enter values
and move from field to field within a sub-menu as
you would within a menu. Use the <Esc> key to
return to the main menu.

Take some time to familiarize yourself with the legend keys and their
corresponding functions. Practice navigating through the various menus
and sub-menus. If you accidentally make unwanted changes to any of the
fields, use the set default hot key <F5> to load the Setup default values.
While moving around through the Setup program, note that explanations
appear in the Item Specific Help window located to the right of each menu.
This window displays the help text for the currently highlighted field.

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4.3 Main Menu

When you enter the Setup program, the following screen appears.

System Time [XX:XX:XX]

Sets the system to the time that you specify (usually the current time). The
format is hour, minute, second. Valid values for hour, minute and second
are Hour: (00 to 23), Minute: (00 to 59), Second: (00 to 59). Use the <Tab>
or <Shift> + <Tab> keys to move between the hour, minute, and second
fields.

System Date [XX/XX/XXXX]

Sets the system to the date that you specify (usually the current date). The
format is month, day, year. Valid values for month, day, and year are
Month: (1 to 12), Day: (1 to 31), Year: (up to 2099). Use the <Tab> or
<Shift> + <Tab> keys to move between the month, day, and year fields.

Legacy Diskette A [1.44M, 3.5 in.]

Sets the type of floppy drive installed. Configuration options: [None] [360K,

5.25 in.] [1.2M , 5.25 in.] [720K , 3.5 in.] [1.44M, 3.5 in.] [2.88M, 3.5 in.]

Floppy 3 Mode Support [Disabled]

This is required to support older Japanese floppy drives. The Floppy 3
Mode feature allows reading and writing of 1.2MB (as opposed to 1.44MB)
on a 3.5-inch diskette. Configuration options: [Disabled] [Enabled]

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Chapter 4: BIOS Setup

Language [English US]

This field allows you to choose the BIOS language version from the
available options.

Supervisor Password [Disabled] / User Password [Disabled]

These fields allow you to set passwords. To set a password, highlight the
appropriate field and press <Enter>. Type in a password then press
<Enter>. You can type up to eight alphanumeric characters. Symbols and
other characters are ignored. To confirm the password, type the password
again and press <Enter>. The password is now set to [Enabled]. This
password allows full access to the BIOS Setup menus. To clear the
password, highlight this field and press <Enter>. The same dialog box as
above appears. Press <Enter>. The password is set to [Disabled].

A note about passwords

The BIOS Setup program allows you to specify passwords in the Main
menu. The passwords control access to the BIOS during system
startup. Passwords are not case sensitive, meaning, passwords typed
in either uppercase or lowercase letters are accepted. The BIOS Setup
program allows you to specify two different passwords: a Supervisor
password and a User password. If you did not set a Supervisor
password, anyone can access the BIOS Setup program. If you did, the
Supervisor password is required to enter the BIOS Setup program and
to gain full access to the configuration fields.

Forgot the password?

If you forget your password, you can clear it by erasing the CMOS
Real Time Clock (RTC) RAM. The RAM data containing the password
information is powered by the onboard button cell battery. See section
“2.7 Switches and jumpers” for information on how to erase the RTC
RAM.

Halt On [All Errors]

This field specifies the types of errors that will cause the system to halt.
Configuration options: [All Errors] [No Error] [All but Keyboard] [All but
Disk] [All but Disk/Keyboard]

Installed Memory [XXX MB]

This field automatically displays the amount of conventional memory
detected by the system during the boot process.

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4.3.1 Primary and Secondary Master/Slave

Type [Auto]

Select [Auto] to automatically detect an IDE hard disk drive. If automatic
detection is successful, Setup automatically fills in the correct values for
the remaining fields on this sub-menu. If automatic detection fails, this may
be because the hard disk drive is too old or too new. If the hard disk was
already formatted on an older system, Setup may detect incorrect
parameters. In these cases, select [User Type HDD] to manually enter the
IDE hard disk drive parameters. Refer to the next section for details.

Before attempting to configure a hard disk drive, make sure you have
the correct configuration information supplied by the drive
manufacturer. Incorrect settings may cause the system to fail to
recognize the installed hard disk.

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Chapter 4: BIOS Setup

[User Type HDD]

Manually enter the number of cylinders, heads and sectors per track for
the drive. Refer to the drive documentation or on the drive label for this
information.

After entering the IDE hard disk drive information into BIOS, use a disk
utility, such as FDISK, to partition and format new IDE hard disk drives.
This is necessary so that you can write or read data from the hard disk.
Make sure to set the partition of the Primary IDE hard disk drives to
active.

If no drive is installed or if you are removing a drive and not replacing it,
select [None].

Other options for the Type field are:

[CD-ROM] - for IDE CD-ROM drives
[LS-120] - for LS-120 compatible floppy disk drives
[ZIP] - for ZIP-compatible disk drives
[MO] - for IDE magneto optical disk drives
[Other A TAPI Device] - for IDE devices not listed here

After making your selections on this sub-menu, press the <Esc> key to
return to the Main menu. When the Main menu appears, the hard disk
drive field displays the size for the hard disk drive that you configured.

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Translation Method [LBA]

Select the hard disk drive type in this field. When Logical Block Addressing
(LBA) is enabled, the 28-bit addressing of the hard drive is used without
regard for cylinders, heads, or sectors. Note that LBA Mode is necessary
for drives with more than 504MB storage capacity. Configuration options:
[LBA] [LARGE] [Normal] [Match Partition Table] [Manual]

Cylinders

This field configures the number of cylinders. Refer to the drive
documentation to determine the correct value. To make changes to this
field, set the Type field to [User Type HDD] and the Translation Method
field to [Manual].

Head

This field configures the number of read/write heads. Refer to the drive
documentation to determine the correct value. To make changes to this
field, set the Type field to [User Type HDD] and the Translation Method
field to [Manual].

Sector

This field configures the number of sectors per track. Refer to the drive
documentation to determine the correct value. To make changes to this
field, set the Type field to [User Type HDD] and the Translation Method
field to [Manual].

CHS Capacity

This field shows the drive’s maximum CHS capacity as calculated by the
BIOS based on the drive information you entered.

Maximum LBA Capacity

This field shows the drive’s maximum LBA capacity as calculated by the
BIOS based on the drive information you entered.

Multi-Sector Transfers [Maximum]

This option automatically sets the number of sectors per block to the
highest number that the drive supports. Note that when this field is
automatically configured, the set value may not always be the fastest
value for the drive. You may also manually configure this field. Refer to the
documentation that came with the hard drive to determine the optimum
value and set it manually. To make changes to this field, set the Type field
to [User Type HDD]. Configuration options: [Disabled] [2 Sectors] [4
Sectors] [8 Sectors] [16 Sectors] [32 Sectors] [Maximum]

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Chapter 4: BIOS Setup

SMART Monitoring [Disabled]

This field allows you to enable or disable the S.M.A.R.T. (Self-Monitoring,
Analysis and Reporting Technology) system that utilizes internal hard disk
drive monitoring technology. This parameter is normally disabled because
the resources used in the SMART monitoring feature may decrease
system performance. Configuration options: [Disabled] [Enabled]

PIO Mode [4]

This option lets you set a PIO (Programmed Input/Output) mode for the
IDE device. Modes 0 through 4 provide successive increase in
performance. Configuration options: [0] [1] [2] [3] [4]

Ultra DMA Mode [Disabled]

Ultra DMA capability allows improved transfer speeds and data integrity for
compatible IDE devices. Set to [Disabled] to suppress Ultra DMA
capability. To make changes to this field, set the Type field to [User Type
HDD]. Configuration options: [0] [1] [2] [3] [4] [5] [Disabled]

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4.3.2 Keyboard Features

Boot Up NumLock Status [On]

This field enables users to activate the Number Lock function upon system
boot. Configuration options: [Off] [On]

Keyboard Auto-Repeat Rate [6/Sec]

This controls the speed at which the system registers repeated keystrokes.
Options range from 6 to 30 characters per second. Configuration options:
[6/Sec] [8/Sec] [10/Sec] [12/Sec] [15/Sec] [20/Sec] [24/Sec] [30/Sec]

Keyboard Auto-Repeat Delay [1/4 Sec]

This field sets the time interval for displaying the first and second
characters. Configuration options: [1/4 Sec] [1/2 Sec] [3/4 Sec] [1 Sec]

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Chapter 4: BIOS Setup

4.4 Advanced Menu

CPU Speed [Manual]

When the motherboard is set to JumperFree™ mode, this field allows you
to select the internal frequency of the CPU. Select [Manual] if you want to
make changes to the two subsequent fields. Note that selecting a
frequency higher than the CPU manufacturer recommends may cause the
system to hang or crash.

CPU Frequency Multiple (when CPU Speed is set to [Manual])

This field is for unlocked processors only. If your processor frequency
multiple is locked, you cannot access this field. This field sets the
frequency multiple between the CPU’s internal frequency (CPU speed)
and external frequency. Set this field in conjunction with CPU Frequency
(MHz) to match the speed of the CPU.

CPU External Frequency (MHz) (when CPU Speed is set to [Manual])

This feature tells the clock generator what frequency to send to the system
bus and PCI bus. The bus frequency (external frequency) multiplied by the
bus multiple equals the CPU speed.

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CPU/Memory Frequency Ratio [Auto]

This field determines whether the memory clock frequency is set to be in
synchronous or asynchronous mode with respect to the system frequency.
The options that appear in the popup menu vary according to the CPU
Frequency (MHz). Configuration options: [Auto] [1:1] [3:4]

AGP/PCI Frequency Setting [Auto]

When set to [Auto], this field allows automatic selection of AGP/PCI
frequency to enhance system performance and overclocking capability.
The setting [Manual] allows you to manually select the AGP/PCI
frequency. If the system becomes unstable, return to the default setting
[Auto]. When this item is set to [Manual], the AGP/PCI Frequency (MHz)
item appears. Configuration options: [Auto] [Manual]

AGP/PCI Frequency (MHz) [66.66/33.33]

This item appears only when the AGP/PCI Frequency Setting is set to
[Manual]. This field allows you to select a higher AGP/PCI frequency for
better system performance.

Selecting a very high AGP/PCI frequency may cause the system to be
unstable!

CPU VCore Setting [Auto]

The [Manual] setting allows you to manually select the core voltage
supplied to the CPU (see next item). However, it is recommended that you
keep the default setting [Auto] to allow the system to automatically
determine the appropriate CPU core voltage.

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Chapter 4: BIOS Setup

CPU VCore [1.750V]

(for Willamette)

, [1.500V]

(for Northwood)

When the CPU VCore Setting parameter above is set to [Manual], the
CPU VCore item allows you to select a specific CPU core voltage. This
field is not accessible when the CPU VCore Setting is set to [Auto].

Depending on the OVER_VOLT jumper setting (see page 2-19 for the
jumper location and settings), the CPU core voltage options vary for both
Willamette and Northwood processors. See the following table.

Refer to the CPU documentation before setting this field. A very high
core voltage may severely damage the CPU!

OVER_VOL T

P4 Processor

Willamette 1.750V, 1.775V, 1.800V, 1.750V, 1.775V, 1.800V,

Jumper

Disabled Enabled

1.825V, 1.850V 1.825V, 1.850V, 1.875V,

1.900V, 1.925V, 1.950V

Northwood 1.500V, 1.525V, 1.550V, 1.500V, 1.525V, 1.550V,

1.575V, 1.600V, 1.625V, 1.575V, 1.600V, 1.625V,

1.650V, 1.675V, 1.700V 1,650V, 1.675V, 1.700V,

1.725V, 1.750V, 1.775V,

1.800V

DDR Reference Voltage [2.6V]

This item controls the DDR SDRAM operating voltage. Configuration
options: [2.9V] [2.7V] [2.6V]

AGP VDDQ Voltage [1.5V]

This item controls the AGP operating voltage. Configuration options: [1.7V]
[1.6V] [1.5]

CPU Level 1 Cache, CPU Level 2 Cache [Enabled]

These fields allow you to choose from the default [Enabled] or choose
[Disabled] to turn on or off the CPU Level 1 and Level 2 built-in cache.
Configuration options: [Disabled] [Enabled]

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DDR Reference Voltage [2.6V]

This item controls the DDR SDRAM operating voltage. Configuration
options: [2.9V] [2.7V] [2.6V]

AGP VDDQ Voltage [1.5V]

This item controls the AGP operating voltage. Configuration options: [1.7V]
[1.6V] [1.5]

CPU Level 1 Cache, CPU Level 2 Cache [Enabled]

These fields allow you to choose from the default [Enabled] or choose
[Disabled] to turn on or off the CPU Level 1 and Level 2 built-in cache.
Configuration options: [Disabled] [Enabled]

BIOS Update [Enabled]

This field functions as an update loader integrated into the BIOS to supply
the processor with the required data. When set to [Enabled], the BIOS
loads the update on all processors during system bootup. Configuration
options: [Disabled] [Enabled]

PS/2 Mouse Function Control [Auto]

The default setting [Auto] allows the system to detect a PS/2 mouse at
startup. If a mouse is detected, the BIOS assigns IRQ12 to the PS/2
mouse. Otherwise, IRQ12 can be used for expansion cards. When you set
this field to [Enabled], BIOS reserves IRQ12, whether or not a PS/2 mouse
is detected at startup. Configuration options: [Enabled] [Auto]

USB Legacy Support [Auto]

This motherboard supports Universal Serial Bus (USB) devices. The
default of [Auto] allows the system to detect a USB device at startup. If
detected, the USB controller legacy mode is enabled. If not detected, the
USB controller legacy mode is disabled.

When you set this field to [Disabled], the USB controller legacy mode is
disabled whether or not you are using a USB device. Configuration
options: [Disabled] [Enabled] [Auto]

OS/2 Onboard Memory > 64M [Disabled]

When using OS/2 operating systems with installed DRAM of greater than
64MB, you need to set this option to [Enabled]. Otherwise, leave to the
default setting [Disabled]. Configuration options: [Disabled] [Enabled]

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Chapter 4: BIOS Setup

4.4.1 Chip Configuration

SDRAM Configuration [By SPD]

This parameter allows you to set the optimal timings for items 2–5,
depending on the memory modules that you are using. The default setting
is [By SPD], which configures items 2–5 by reading the contents in the
SPD (Serial Presence Detect) device. The EEPROM on the memory
module stores critical information about the module, such as memory type,
size, speed, voltage interface, and module banks.
Configuration options: [User Defined] [By SPD]

The SDRAM parameters (items 2~5) become configurable only when
you set the SDRAM Configuration to [User Defined].

SDRAM CAS Latency [2.5T]

This item controls the latency between the SDRAM read command and
the time the data actually becomes available. It is recommended to keep
the default setting for stable system operation.

SDRAM RAS to CAS Delay [3T]

This item controls the latency between the DDR SDRAM active command
and the read/write command. It is recommended to keep the default
setting for stable system operation.

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SDRAM RAS Precharge Delay [3T]

This item controls the idle clocks after issuing a precharge command to
the DDR SDRAM. It is recommended to keep the default setting for stable
system operation.

SDRAM Active Precharge Delay [6T]

This item controls the number of DDR SDRAM clocks used for DDR
SDRAM parameters. It is recommended to keep the default setting for
stable system operation.

SDRAM Idle Timer [Infinite]

Configuration options: [Infinite] [0T] [8T] [16T] [64T]

CKx16 Strength Control [2.00x]

This item controls the drive strength of the DDR SDRAM clock signal for
an x16 device. It is recommended to keep the default setting for stable
system operation. Configuration options: [0.75x] [1.00x] [1.25x] [1.50x]
[1.75x] [2.00x] [2.25x] [2.50x] [2.75x] [3.00x] [3.25x] [3.50] [3.75x] [4.00x]

CKx8 Strength Control [2.00x]

This item controls the drive strength of the DDR SDRAM clock signal for
an x8 device. It is recommended to keep the default setting for stable
system operation. Configuration options: [0.75x] [1.00x] [1.25x] [1.50x]
[1.75x] [2.00x] [2.25x] [2.50x] [2.75x] [3.00x] [3.25x] [3.50] [3.75x] [4.00x]

DQ DQS Strength Control [2.00x]

This item controls the drive strength of the DDR SDRAM signals DQ and
DQS. It is recommended to keep the default setting for stable system
operation. Configuration options: [0.75x] [1.00x] [1.25x] [1.50x] [1.75x]
[2.00x] [2.25x] [2.50x] [2.75x] [3.00x] [3.25x] [3.50] [3.75x] [4.00x]

Graphics Aperture Size [64MB]

This feature allows you to select the size of mapped memory for AGP
graphic data. Configuration options: [4MB] [8MB] [16MB] [32MB] [64MB]
[128MB] [256MB]

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Chapter 4: BIOS Setup

AGP Capability [4X Mode]

This motherboard supports the AGP 4X interface that transfers video data
at 1066MB/s. AGP 4X is backward-compatible, so you may keep the
default [4X Mode] even if you are using an AGP 1X video card. When set
to [1X Mode], the AGP interface only provides a peak data throughput of
266MB/s even if you are using an AGP 4x card.
Configuration options: [1X Mode] [4X Mode]

Video Memory Cache Mode [UC]

USWC (uncacheable, speculative write combining) is a new cache
technology for the video memory of the processor. It can greatly improve
the display speed by caching the display data. You must set this to UC
(uncacheable) if your display card does not support this feature, otherwise
the system may not boot. Configuration options: [UC] [USWC]

Memory Hole At 15M-16M [Disabled]

This field allows you to reserve an address space for ISA expansion cards.
Setting the address space to a particular setting makes that memory
space unavailable to other system components. Expansion cards can only
access memory up to 16MB. Configuration options: [Disabled] [Enabled]

Delayed Transaction [Disabled]

When set to [Enabled], this feature frees the PCI bus when the CPU is
accessing 8-bit ISA cards. This process normally consumes about 50-60
PCI clocks without PCI delayed transaction. Set this field to [Disabled]
when using ISA cards that are not PCI 2.1 compliant. Configuration
options: [Enabled] [Disabled]

Onboard PCI IDE [Both]

This field allows you to enable either the primary IDE channel or
secondary IDE channel, or both. You can also set both channels to
[Disabled]. Configuration options: [Both] [Primary] [Secondary] [Disabled]

USB 2.0 MS Reference Voltage [Medium]

This item controls the USB 2.0 high-speed drive strength reference
voltage. Configuration options: [Low] [Medium] [High] [Maximum]

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4.4.2 I/O Device Configuration

Floppy Disk Access Control [R/W]

When set to [Read Only], this parameter protects files from being copied to
floppy disks by allowing reads from, but not writes to, the floppy disk drive.
The default setting [R/W] allows both reads and writes. Configuration
options: [R/W] [Read Only]

Onboard Serial Port 1 [3F8H/IRQ4]
Onboard Serial Port 2 [2F8H/IRQ3]

These fields allow you to set the addresses for the onboard serial
connectors. Serial Port 1 and Serial Port 2 must have different addresses.
Configuration options: [3F8H/IRQ4] [2F8H/IRQ3] [3E8H/IRQ4] [2E8H/
IRQ10] [Disabled]

UART2 Use As [COM Port]

This field allows you to select the device on which to assign UART2.
Configuration options: [COM Port] [IR] [Smart Card Reader]

Onboard Parallel Port [378H/IRQ7]

This field allows you to set the address of the onboard parallel port
connector . If you disable this field, the Parallel Port Mode and ECP DMA
Select configurations are not available. Configuration options: [Disabled]
[378H/IRQ7] [278H/IRQ5]

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Chapter 4: BIOS Setup

Parallel Port Mode [ECP+EPP]

This field allows you to set the operation mode of the parallel port.
[Normal] allows normal-speed operation but in one direction only; [EPP]
allows bidirectional parallel port operation; [ECP] allows the parallel port to
operate in bidirectional DMA mode; [ECP+EPP] allows normal speed
operation in a two-way mode. Configuration options: [Normal] [EPP] [ECP]
[ECP+EPP]

ECP DMA Select [3]

This field allows you to configure the parallel port DMA channel for the
selected ECP mode. This selection is available only if you select [ECP] or
[ECP+EPP] in Parallel Port Mode above. Configuration options: [1] [3]

Speech POST Reporter [Enabled]

This field enables or disables the ASUS POST Reporter™ feature. See
section “1.3 Special Features” and “3.2 Vocal POST messages” for more
information. Configuration options: [Disabled] [Enabled]

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4.4.3 PCI Configuration

Slot 1/5, Slot 2, Slot 3, Slot 4, Slot 6 IRQ [Auto]

These fields automatically assign the IRQ for each PCI slot. The default
setting for each field is [Auto], which utilizes auto-routing to determine IRQ
assignments. Configuration options: [Auto] [NA] [3] [4] [5] [7] [9] [10] [11]
[12] [14] [15]

PCI/VGA Palette Snoop [Disabled]

Some non-standard VGA cards, like graphics accelerators or MPEG video
cards, may not show colors properly. Setting this field to [Enabled] corrects
this problem. If you are using standard VGA cards, leave this field to the
default setting [Disabled]. Configuration options: [Disabled] [Enabled]

PCI Latency Timer [32]

Leave this field to the default setting [32] for best performance and
stability.

USB 1.1 Controllers [3 Controllers]

This field allows you to select the number of USB 1.1 controllers that you
wish to activate. Configuration options: [Disabled] [1 Controller]
[2 Controllers] [3 Controllers]

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Chapter 4: BIOS Setup

USB 2.0 Controller [Enabled]

This field allows you to enable or disable the onboard USB 2.0 controller.
Set to [Enabled] if you wish to install USB 2.0 devices. Configuration
options: [Disabled] [Enabled]

Primary VGA BIOS [PCI VGA Card]

This field allows you to select the primary graphics card. Configuration
options: [PCI VGA Card] [AGP VGA Card]

Onboard PCI Audio Controller [Enabled]

This field allows you to enable or disable the onboard PCI audio controller.
Configuration options: [Disabled] [Enabled]

4.4.3.1 PCI IRQ Resource Exclusion

IRQ XX Reserved [No/ICU]

These fields indicate whether or not the displayed IRQ for each field is
being used by a legacy (non-PnP) ISA card. The setting [No/ICU] for an
IRQ field indicates that you are using the ISA Configuration Utility (ICU),
and that this particular IRQ is NOT required by a legacy ISA card. Set the
IRQ field to [Yes] if you install a legacy ISA card that requires a unique IRQ
and you are NOT using ICU. Configuration options: [No/ICU] [Yes]

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4.5 Power Menu

The Power menu allows you to reduce power consumption. This feature
turns off the video display and shuts down the hard disk after a period of
inactivity.

Power Management [User Defined]

This field allows you to activate or deactivate the automatic power saving
features. When set to [Disabled], the power management features do not
function regardless of the other settings on this menu. The [User Defined]
option allows you to set the period of inactivity before the system enters
suspend mode. Refer to “Suspend Mode” item.

When set to [Max Saving], system power is conserved to its greatest
amount. This setting automatically puts the system into suspend mode
after a brief period of system inactivity. [Min Saving] allows the least power
saving as the system enters suspend mode only after a long period of
inactivity. Configuration options: [User Defined] [Disabled] [Min Saving]
[Max Saving]

You should install the Advanced Power Management (APM) utility to
keep the system time updated even when the computer enters
suspend mode. In Windows 3.x and Windows 95, you need to install
Windows with the APM feature. In Windows 98 or later, APM is
automatically installed as indicated by a battery and power cord icon
labeled “Power Management” in the Control Panel. Select the item
“Advanced” in the Power Management Properties dialog box.

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Chapter 4: BIOS Setup

Video Off Option [Suspend -> Off ]

This field determines when to activate the video off feature for monitor
power management. Configuration options: [Always On] [Suspend -> Off]

Video Off Method [DPMS OFF]

This field defines the video off features. The Display Power Management
System (DPMS) feature allows the BIOS to control the video display card if
it supports the DPMS feature. [Blank Screen] only blanks the screen. Use
this for monitors without power management or “green” features.

Even if installed, your screen saver does not display when you select
[Blank Screen] for the above field.

[V/H SYNC+Blank] blanks the screen and turns off vertical and horizontal
scanning. Configuration options: [Blank Screen] [V/H SYNC+Blank]
[DPMS Standby] [DPMS Suspend] [DPMS OFF] [DPMS Reduce ON]

HDD Power Down [Disabled]

Shuts down any IDE hard disk drives in the system after a period of
inactivity as set in this user-configurable field. This feature does not affect
SCSI hard drives. Configuration options: [Disabled] [1 Min] [2 Min] [3
Min]...[15 Min]

ACPI Suspend To RAM [Disabled]

This field allows you to enable or disable the ACPI Suspend-to-RAM
feature. To support this feature, the +5VSB of the power supply should
have the capacity to provide more than 720mA current. Configuration
options: [Disabled] [Enabled]

Suspend Mode [Disabled]

Sets the time period before the system goes into suspend mode.
Configuration options: [Disabled] [1~2 Min] [2~3 Min] [4~5 min] [8~9 Min]
[20 Min] [30 Min]

PWR Button < 4 Secs [Soft Off]

When set to [Soft off], the ATX switch can be used as a normal system
power-off button when pressed for less than 4 seconds. [Suspend] allows
the button to have a dual function where pressing less than 4 seconds
puts the system in sleep mode. Regardless of the setting, holding the ATX
switch for more than 4 seconds powers off the system. Configuration
options: [Soft off] [Suspend]

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4.5.1 Power Up Control

AC PWR Loss Restart [Disabled]

This allows you to set whether or not to reboot the system after power
interruptions. [Disabled] leaves your system off while [Enabled] reboots the
system. [Previous State] sets the system back to the state it was before
the power interruption. Configuration options: [Disabled] [Enabled]
[Previous State]

Wake/Power Up On Ext. Modem [Disabled]

This allows either settings of [Enabled] or [Disabled] for powering up the
computer when the external modem receives a call while the computer is
in Soft-off mode. Configuration options: [Disabled] [Enabled]

The computer cannot receive or transmit data until the computer and
applications are fully running. Thus, connection cannot be made on the
first try. Turning an external modem off and then back on while the
computer is off causes an initialization string that turns the system
power on.

Power Up On PCI Card [Disabled]

When set to [Enabled], this parameter allows you to turn on the system
through a PCI LAN or modem card. This feature requires an ATX power
supply that provides at least 1A on the +5VSB lead.
Configuration options: [Disabled] [Enabled]

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Chapter 4: BIOS Setup

Power On By PS/2 Keyboard [Space Bar]

This parameter allows you to use specific keys on the keyboard to turn on
the system. This feature requires an ATX power supply that provides at
least 1A on the +5VSB lead. Configuration options: [Disabled] [Space Bar]
[Ctrl-Esc] [Power Key]

Power On By PS/2 Mouse [Disabled]

When set to [Enabled], this parameter allows you to use the PS/2 mouse
to turn on the system. This feature requires an ATX power supply that
provides at least 1A on the +5VSB lead. Configuration options: [Disabled]
[Enabled]

Automatic Power Up [Disabled]

This allows an unattended or automatic system power up. You may
configure your system to power up at a certain time of the day by selecting
[Everyday] or at a certain time and day by selecting [By Date].
Configuration options: [Disabled] [Everyday] [By Date]

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4.5.2 Hardware Monitor

MB Temperature [xxxC/xxxF]
CPU Temperature [xxxC/xxxF]
POWER Temperature [N/A]

The onboard hardware monitor automatically detects and displays the
motherboard and CPU temperatures.

If your power supply comes with a two-pin thermal sensor cable, connect
this cable to the TRPWR connector on the motherboard to allow BIOS to
auto-detect the power supply temperature (see page 2-28 for the location
of the TRPWR connector). The POWER temperature item shows N/A if
you do not have the appropriate power supply. Select [Ignore] to disable
the power temperature auto-detect function.

Q-Fan Control [Disabled]

This item allows you to enable or disable the ASUS Q-Fan feature that
smartly adjusts the fan speeds for more efficient system operation. When
this field is set to [Enabled], the Fan Speed Ratio and Speed Up/Down

Response Time

speeds and the corresponding response time. Configuration options:
[Disabled] [Enabled]

items appear to allow selection of the appropriate fan

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Chapter 4: BIOS Setup