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.

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.

About this guide

This user guide contains the information you need when installing the ASUS P4B266-C motherboard.
How this guide is organized
This manual contains the following parts: Chapter 1: Product introduction This chapter describes the features of the P4B266-C 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. Glossary This part lists the technical terms that you may encounter when reading this document. Index This part contains an alphabetical list of the topics found in this document.

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.

ASUS contact information

ASUSTeK COMPUTER INC. (Asia-Pacific)
Address: General Tel: General Fax: General Email: 150 Li-Te Road, Peitou, Taipei, Taiwan 112 +886-2-2894-3447 +886-2-2894-3449 info@asus.com.tw

Technical Support

MB/Others (Tel): Notebook (Tel): Desktop/Server (Tel): Support Fax: Support Email: Web Site: Newsgroup: +886-2-2890-7121 (English) +886-2-2890-7122 (English) +886-2-2890-7123 (English) +886-2-2890-7698 tsd@asus.com.tw www.asus.com.tw cscnews.asus.com.tw
ASUS COMPUTER INTERNATIONAL (America)
Address: General Fax: General Email: 6737 Mowry Avenue, Mowry Business Center, Building 2, Newark, CA 94560, USA +1-510-608-4555 tmd1@asus.com
Support Fax: Notebook (Tel): Web Site: Support Email: +1-510-608-4555 1-877-918-ASUS (2787) www.asus.com tsd@asus.com
ASUS COMPUTER GmbH (Europe)
Address: General Fax: General Email: Harkortstr. 25, 40880 Ratingen, BRD, Germany +49-2102-442066 sales@asuscom.de (for marketing requests only)
Support Hotline: Notebook (Tel): Support Fax: Support (Email): Web Site: MB/Others: +49-2102-9599-0 +49-2102-9599-10 +49-2102-9599-11 www.asuscom.de/de/support (for online support) www.asuscom.de

Chapter 1

This chapter describes the features of the P4B266-C motherboard. It includes brief explanations of the special attributes of the motherboard and the new technology it supports.

Product introduction

ASUS P4B266-C motherboard

Welcome!

Thank you for buying the ASUS P4B266-C motherboard! The ASUS P4B266-C motherboard delivers a host of new features and latest technology making it another standout in the long line of ASUS quality motherboards! The P4B266-C incorporates the Intel Pentium 4 Processor in 478-pin package/Northwood Processor coupled with the Intel 845D (Brookdale) 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, high-speed data transfers using the ATA100 protocol, and 6-channel PCI audio features, the P4B266-C 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.

Package contents

ASUS P4B266-C motherboard (ATX form factor: 12-in x 9-in) ASUS P4B266-C support CD ASUS 2-port USB module 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)
Check your P4B266-C package for the following items.
If any of the above items is damaged or missing, contact your retailer.
ASUS P4B266-C motherboard user guide

Special features

1.3.1 Product highlights
Latest processor technology
The P4B266-C motherboard supports the latest Intel Pentium 4 478/ Northwood Processor via a 478-pin surface mount ZIF socket. The Pentium 4 processor utilizes the advanced 0.18 micron processor core in FC-PGA2 package for a 2.0GHz frequency, while the Northwood processor uses the 0.13 micron processor core with 512KB L2 cache for up to a speedy 2.4+GHz frequency. Pentium 4 offers optimized performance for audio, video, and Internet applications. See page 2-4.

DDR memory support

Employing the Double Data Rate (DDR) memory technology, the P4B266-C 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.
PCI-based HRTF 3D positional audio (on audio models only)
Audio models include the C-Media CMI8738 audio chip with high speed PCI V2.1 bus controller. This audio controller supports the legacy audio SBPRO, FM emulator/DLS Wave music synthesis, and HRTF 3D positional audio functions. The audio controller also meets PC 99 requirements and supports the 24-bit Sony/Philips Digital Interface (S/PDIF) In (0.5V~5V) and S/PDIF Out (44.1K and 48K formats) module. Experience 5.1-channel surround sound and enhanced 3D audio while playing DVDs and computer games. See pages 1-7 and 2-31.
Onboard LAN (on LAN models only)
The motherboard incorporates the RealTek RTL8100 LAN controller to support 10BASE-T/100BASE-TX Fast Ethernet networking.

AGP burn-out protection

An AGP warning LED is onboard to serve as a smart burn-out protection for the motherboard. This LED prevents you from powering up the system if you installed any AGP card that is not supported by the motherboard. See pages 1-6 and 2-3 for details.
Chapter 1: Product introduction

AFPANEL

IRRX GND IRTX SMBDATA +3VSB SMBCLK NC NC NC NC IRRX GND IRTX +5 V

SIR CIR

NC GND NC CIRRX +5VSB CHASSIS# EXTSMI# +5V MLEDPCIRST# BATT NC

NC GND NC CIRRX +5VSB

Standard Infrared (SIR) Front View Back View

IR_CON

P4B266-C iPanel Connector

IRTX GND IRRX

+5V (NC)
13. Digital audio connector (4-1 pin SPDIF_C) (on audio models only) This connector connects an optional 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.

SPDIF_OUT SPDIF_IN

P4B266-C Digital Audio Connector
14. Smart Card Reader connector (14-1 pin SMARTCARD) 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.

SMARTCARD

NC NC SCRST NC SCRIO SCRRES#

P4B266-C Smartcard

15. Power supply thermal connector (2-pin TRPWR) If your power supply has a thermal monitoring feature, connect its thermal sensor cable to this connector.

TRPWR Ground

P4B266-C Power Supply Thermal Connector
VCC NC SCPWR# SCCLK NC GND NC
16. System panel connector (20-pin PANEL) This connector accommodates several system front panel functions.

Keyboard Lock Power LED

PLED Keylock Ground +5 V

Speaker Connector

+5V Ground Ground Speaker
+5 V MLED ExtSMI# Ground PWRBTN Ground

Message LED

Reset SW ATX Power Switch*

SMI Lead

P4B266-C System Panel Connectors
* Requires an ATX power supply.
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.

Reset Ground

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.

Chapter 3

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

Powering up

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

One short beep when displaying logo Long beeps in an endless loop One long beep followed by three short beeps High frequency beeps when system is working

Meaning

No error during POST No DRAM installed or detected Video card not found or video card memory bad CPU overheated; System running at a lower frequency
You will not hear the BIOS beeps if you did not connect the casemounted speaker to the system warning speaker lead.
7. At power on, hold down <Delete> to enter BIOS Setup. Follow the instructions in Chapter 4. ASUS P4B266-C motherboard user guide 3-1

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.

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

Managing and updating your BIOS
4.1.1 Using the computer system for the first time
It is recommended that you save a copy of the original motherboard BIOS along with a Flash Memory Writer utility (AFLASH.EXE) to a bootable floppy disk in case you need to reinstall the BIOS later. 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.
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>.

Chapter 4: BIOS Setup

4.1.2 Updating BIOS procedures
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.
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 Flashed Successfully appears.
8. Follow the onscreen instructions to continue.
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.

BIOS Setup program

This motherboard supports a programmable EEPROM that you can update using the provided utility described in section 4.1 Managing and 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. 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.

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].
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 drives maximum CHS capacity as calculated by the BIOS based on the drive information you entered.

Maximum LBA Capacity

This field shows the drives 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]
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]

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]
Main menu items continued.

Language [English]

This field displays the BIOS language version.
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.

SDRAM CAS Latency [2.5T]

This item controls the latency between the SDRAM read command and the time the data actually becomes available.
The DDR SDRAM CAS Latency parameter appears only when you set the SDRAM Configuration to [User Defined].
SDRAM RAS to CAS Delay [3T]
This item controls the latency between the DDR SDRAM active command and the read/write command.
The DDR SDRAM RAS to CAS Delay parameter appears only when you set the SDRAM Configuration to [User Defined].
SDRAM RAS Precharge Delay [3T]
This item controls the idle clocks after issuing a precharge command to the DDR SDRAM.
The DDR SDRAM RAS Precharge Delay parameter appears only when you set the SDRAM Configuration to [User Defined].
SDRAM Active Precharge Delay [6T]
This item controls the number of DDR SDRAM clocks used for DDR SDRAM parameters.
The DDR SDRAM Active Precharge Delay parameter appears only when you set the SDRAM Configuration to [User Defined].
SDRAM Idle Timer [Infinite]
Configuration options: [Infinite] [0T] [8T] [16T] [64T]
Optimization Mode [Normal]
This parameter allows you to enhance system performance and overclocking capability when set to [Turbo 1] or [Turbo 2]. If you encounter any problems with the turbo settings, return to the default setting [Normal]. Configuration options: [Normal] [Turbo 1] [Turbo 2]
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]

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]

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]
Power Up On USB [Disabled]
When set to [Enabled], this item allows you to power up the system through a USB device activity. This feature requires an ATX power supply that provides at least 1A on the +5VSB lead. Configuration options: [Disabled] [Enabled]
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]

4.5.2 Hardware Monitor

MB Temperature [xxxC/xxxF] CPU Temperature [xxxC/xxxF] POWER Temperature [Ignore]
The onboard hardware monitor automatically detects 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 so BIOS can auto-detect the power supply temperature. See page 2-32 for the connector location. The POWER Temperature item shows [N/A] if you do not have the appropriate power supply.
CPU Fan Speed [xxxxRPM] Chassis Fan Speed [N/A] Power Fan Speed [xxxxRPM)
The onboard hardware monitor automatically detects the CPU and chassis fan speeds in rotations per minute (RPM).
VCORE Voltage, +3.3V Voltage, +5V Voltage, +12V Voltage
The onboard hardware monitor automatically detects the voltage output through the onboard voltage regulators.
If any of the monitored items is out of range, the following error message appears: Hardware Monitor found an error. Enter Power setup menu for details. You will then be prompted to Press F1 to continue or DEL to enter SETUP.

Boot Menu

Boot Sequence
The Boot menu allows you to select among the four possible types of boot devices listed using the up and down arrow keys. By using the <+> or <Space> key, you can promote devices and by using the <-> key, you can demote devices. Promotion or demotion of devices alters the priority which the system uses to search for a boot device on system power up. Configuration fields include Removable Devices, IDE Hard Drive, ATAPI CD-ROM, and Other Boot Device.

This option allows you to discard the selections you made and restore the previously saved values. After selecting this option, a confirmation appears. Select [Yes] to discard any changes and load the previously saved values.

Save Changes

This option saves your selections without exiting the Setup program. You can then return to other menus and make further changes. After you select this option, a confirmation window appears. Select [Yes] to save any changes to the non-volatile RAM.

Chapter 5

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

Software support

Install an operating system
This motherboard supports Windows 98/ME/NT/2000/XP and OS/2 operating system (OS). Always install the latest OS version and corresponding updates so you can maximize the features of your hardware.
Because motherboard settings and hardware options vary, use the setup procedures presented in this chapter for general reference only. Refer to your OS documentation for more information.

Support CD information

The support CD that came with the motherboard contains useful software and several utility drivers that enhance the motherboard features.
The contents of the support CD are subject to change at any time without notice. Visit the ASUS website for updates.
5.2.1 Running the support CD
To begin using the support CD, simply insert the CD into your CD-ROM drive. The CD automatically displays the welcome screen and the installation menus if Autorun is enabled in your computer.
If the welcome screen did not appear automatically, locate and doubleclick on the file ASSETUP.EXE from the BIN folder in the support CD to display the menus.

5.2.2 Main menu

From the welcome screen, the program takes you directly to the main menu. The main menu displays an image of the motherboard, and the buttons and icons that link you to the software, drivers, utilities, and other information contained in the support CD.

The C-Media PCI Audio Driver and Applications are included in the Support CD that came with your motherboard package. Install these programs to enable the multi-channel audio feature.
You must use 4 or 6 channel speakers for this setup.
Setting the C-Media Audio Mixer
1. Install the C-Media 6-channel PCI audio driver from the support CD. 2. After installation, the C-Media Mixer icon appears on the bottom right of the screen.

Mixer Icon

3. Click on the mixer icon to display the C-Media Audio Mixer.

Advanced Button

You may also launch the Mixer by clicking on the Start button on your Windows desktop, then select
Programs/PCI Audio Applications/ Mixer/Audio Rack.
4. Click on the Advanced button on the Mixer to display the Speaker, Volume, Sound Effects, and Options menus.
Make sure that the BCS1/BCS2 jumpers are set correctly before using the 6-channel audio feature. See page 2-21 for the settings.
Running the C-Media Audio Demo Program
The C-Media audio demo program allows you to test and fine tune your speaker system. To launch the the multi-channel audio demo program, click on Start from your desktop, then select PCI Audio Applications/ Multi-Channel Audio Demo. From the demo program interface, click on Help to display the instructions and hardware diagrams for configuring and testing your speaker system.

TV Box

To configure your speakers, launch the Speaker Channel Configuration menu by clicking on the TV Box on the program interface.
The functions of the Line Out (lime), Line In (blue), and Mic (pink) connectors on the rear panel change when you select the 6-channel audio configuration. Refer to the following table.
Connector Settings and Functions
Headphone/ 2-Speaker Lime Light Blue Pink 4-Speaker 6-Speaker Line Out/ Front Spkr Out Rear Speaker Out Center Speaker Out, Sub-woofer
Line Out/ Line Out/ Front Spkr Out Front Spkr Out Line In Mic In Rear Speaker Out Mic In

Glossary

This part lists the technical terms that you may encounter when reading this document.

Page 1

Mini System Request
ASUSTek Computer Inc. P4B266-C W Sound/12-TWA-FP408 Flex ATX (228mm x 191mm) P4B266 CPU Pentium 4 (Socket 478)
18/04/2001 BIOS 1002 PCB 1.00

Package

USER Guide

Quick Setup Guide Q773

Quick Reference CARD

CD Driver M-219

Cable FDD / HDD 66/33

X USB with Bracket

Intel ICH2

Intel 845D

Socket 478

Back Panel

Page 2

Main Board Components

PROCESSOR (Processor Support) CHIPSET System Bus (FSB) EXPANSION SLOTS PCI Slot AGP Slot SYSTEM MEMORY Socket 478 Intel Pentium 4 / Intel Pentium 4 Northwood 1.4 to 2.2 GHz and higher North Bridge : Intel 845D South Bridge : Intel 82801BA (ICH2) Supports 400 MHz Front Side bus 6 x PCI Slots (32bit PCI 2.2) 1 x AGP 4X slot (1.5 V) 2 x168-pin DIMM Socket to Support 64 MB to 1 GB PC100/ PC133 SDRAM Memory modules Total Memory size is 2 X Max 1 GB = 2 GB Max. Support unbuffered ECC , non ECC 1 Floppy Port (up to 2.88MB,3 Mode Floppy Supported & LS-120) 2 Serial Ports (16550 Fast UART Compatible) 1 Parallel Port (ECP, EPP Port) 2 USB + 2 USB Connector (Optional) 1 PS/2 Mouse, 1 PS/2 Keyboard C-MEDIA CMI8738/PCI-6ch-MX Support 6 Channel 2 x UltraDMA100 Bus Master IDE Ports (ATA 100 / 66 / 33) ATAPI IDE CD-ROM,DVD,CDR/RW,LS-120 & Tape Backup Supported 3V, 5V and 12V 20-pin ATX Power Connector, Soft Power Off Support , ASUS EZ Plug Award Bios Size 2 Mb Plug and Play DMI / Green / Trend Chip Away Virus (TCAV) / Boot Block , ACPI Hardware Monitoring
PC99 Compliant Colorful I/O ON BOARD SUPER I/O
On Board Audio ON BOARD PCI IDE ATX Power Connector BIOS Feature

Special Features

Page 3

Memory

DIMM Location Socket 1 (Rows 0&1) Socket 2 (Rows 2&3) 168-pin DIMM Total Memory SDRAM 64, 128, 256, 512, 1GB x1 SDRAM 64, 128, 256, 512, 1GB x1 Total System Memory = Max 2GB

Install Driver

Windows 98se / ME /2000 (Menu Software Windows 2000 Pro Cyberlink Video And Audio Software Application)

Page 4

Main Board P4B266-C

P4B266-C P4B266

PentiumPentiumProcessor i845D and ICH2 i845D and ICH2 Chipset DDR SDRAM PC1600 / PC 2100 System Memory Memory Slot 2GB Max Memory Support C-MEDIA CMI8738 PCI 6-ch MX Audio 1 AGP 4X 1 AGP 4X Expansion Slot 5 PCI 5 PCI 1 CNR 4 USB (Ver 1.1) 4 USB (Ver 1.1) 4 USB (Ver 2.0) 2.01 1.08 PCB Version ATX Form Factor