2. FEA TURES Specifications 8
SMBus: Features the System Management Bus interface, which is used to physically transport commands and information between SMBus devices. PC Health Monitoring: Provides an easy way to examine and manage system status information, such as CPU and systerm voltages, temperatures, and fan status through the onboard hardware ASUS ASIC and the bundled ASUS PC Probe or Intel LDCM software. AMR Slot: Audio Modem Riser slot supports a very affordable audio and/or modem riser card. PCI/ISA Expansion Slots: Provides options of five 32-bit PCI (Rev. 2.2) with one 16-bit ISA expansion slots and four PCI with two ISA. All PCI slots can support Bus Master PCI cards, such as SCSI or LAN cards. (PCI supports up to 133MB/s maximum throughput.) Low Pin Count (LPC) Multi-I/O: Provides two high-speed UART compatible serial ports and one parallel port with EPP and ECP capabilities. UART2 can also be directed from COM2 to the Infrared Module for wireless connections. Enhanced ACPI & Anti-Boot Virus Protection: Programmable BIOS (Flash EEPROM), offering enhanced ACPI for Windows 98 compatibility, built-in firmware-based virus protection, and autodetection of most devices for virtually automatic setup. Smart BIOS: 4Mb firmware gives a new easy-to-use interface which provides more control and protection over the motherboard. Provides Vcore and CPU/ SDRAM frequency adjustments, boot block write protection, and HD/SCSI/MO/ ZIP/CD/Floppy boot selection. Hardware random number generator supports new security software for data protection and secured Internet transactions. IrDA: Supports an optional infrared port module for wireless interface. Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI master busses to the memory and processor.
2.1.2 SpecificationsOptional Components
The following onboard components are optional at the time of purchase: Onboard Audio: Hardware AC97 V2.1 CODEC compliant, Analog Devices, Inc.s 3D sound circuitry, sample rate conversion from 7kHz to 48kHz. Full audio output can be directed to the chassis internal speaker to save space, save money, and reduce complications associated with external speakers. Infrared Interface: Integrated Consumer IR and Serial IR supports an optional remote control package for wireless interfacing with external peripherals, personal gadgets, or an optional remote controller.

2. FEA TURES Optional Components

2.1.3 Performance

UltraPerformance: Onboard IDE Bus Master controller with two connectors that support four IDE devices in two channels. Supports UltraDMA/66, UltraDMA/33 (IDE DMA Mode 2), PIO Modes 3 & 4, and supports Enhanced IDE devices, such as DVD-ROM, CD-ROM, CD-R/RW, LS-120, and Tape Backup drives. Dual Speeds: CPU frequency can operate at either 133MHz or 100MHz. High-Speed Data Transfer Interface: IDE transfers using UltraDMA/33 Bus Master IDE can handle rates up to 33MB/s. This motherboard with its chipset and support for UltraDMA/66 doubles the UltraDMA/33 burst transfer rate to 66.6MB/s. UltraDMA/66 is backward compatible with both DMA/33 and DMA and with existing DMA devices and systems so there is no need to upgrade current EIDE/IDE drives and host systems. (UltraDMA/66 requires a 40-pin 80-conductor cable to be enabled and/or for UltraDMA Mode 4.) Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI master buses to memory to CPU. SDRAM Optimized Performance: This motherboard supports PC100-compliant Synchronous Dynamic Random Access Memory (SDRAM), which increases the data transfer rate to 800MB/s max ACPI Ready: ACPI (Advanced Configuration and Power Interface) is also implemented on all ASUS smart series motherboards. ACPI provides more Energy Saving Features for future operating systems (OS) supporting OS Direct Power Management (OSPM) functionality. With these features implemented in the OS, PCs can be ready around the clock, yet satisfy all the energy saving standards. To fully utilize the benefits of ACPI, an ACPI-supported OS, such as Windows 98, must be used. Suspend and Go: Suspend-to-RAM (STR) provides maximum power savings as an alternative to leaving the computer ON and QuickStart so that you do not have to wait for a long time for system bootup. PC 99 Compliancy: Both the BIOS and hardware levels of the motherboard meet PC 99 compliancy. The new PC 99 requirements for systems and components are based on the following high-level goals: support for Plug and Play compatibility and power management for configuring and managing all system components, and 32-bit device drivers and installation procedures for Windows 95/98/NT. Color-coded connectors and descriptive icons make identification easy as required by PC 99.

AUD_EN1 AUD_EN2 AUD_EN1 AUD_EN2
3. H/W SETUP Motherboard Settings 20

Enable

(Default)

Disable

P3C2000 Audio Codec Setting
6) AMR Bus Setting (ADN#) This jumper allows you to select the AMR bus to be Primary Codec or Secondary Codec. If onboard audio codec is enabled, Secondary Codec must be selected; otherwise, select Primary Codec if the onboard audio CODEC is disabled.

3 Primary Codec

Secondary Codec (Default)

P3C2000 AMR Bus Setting

7) Voltage I/O Setting (JP5) This jumper allows you to select the voltage supplied to the DRAM, chipset, AGP, and PCI. The default setting of Normal should be used unless processor overclocking requires a higher voltage (Test).

1 Normal (Default)

1 Test
P3C2000 Input/Output Voltage Setting
WARNING! Using a higher voltage may help when overclocking but may result in the shortening of your computer components life. It is highly recommended that you leave this setting on its default. 8) MCH/MTH Voltage Selection (JP2702 / JP3) These jumpers allow you to select the voltage supplied to the CPUs I/O buffer. The default setting of Normal should be used unless processor overclocking requires a higher voltage (Test).

JP2702 (MCH)

3 Normal (Default)

3 Test

JP3 (MTH)
3 Normal (Default) 3 Test
P3C2000 MCH/MTH Voltage Selection
9) CPU External Frequency Setting (DSW-1, -2, -3, -4, -5) This option tells the clock generator what frequency to send to the CPU and the PCI bus. This allows the selection of the CPUs External frequency. IMPORTANT: 1. In JumperFree mode, all dip switches (DSW-1DSW-5) must be set to OFF. 2. When JumperFree mode is enabled, use BIOS setup in place of these switches (see CPU Speed in Advanced Menu in BIOS Setup). NOTE: Only selected switches are illustrated. For a complete frequency listing, see next page.

ON ON ON ON 4 5

3. H/W SETUP Motherboard Settings 22

CPU 100.0MHz

103.0MHz

105.0MHz

107.0MHz

CPU 109MHz

112.0MHz

114.0MHz

116.0MHz
P3C2000 CPU External Clock (BUS) Frequency Selection

CPU 120MHz

125.00MHz 133.0MHz

ON 5 ON 5

138.0MHz

CPU 142.0MHz

150.0MHz

168MHz

180MHz

(JumperFree Mode)

NOTE: If your processor does not have a locked Frequency Multiple, you must use CPU Core:Bus Freq. Multiple in 4.4 Advanced Menu of the BIOS setup to set the Frequency Multiple. If the Frequency Multiple is locked, setting the Frequency Multiple in BIOS setup will have no effect.
External Frequency Table The following table is for use by experienced motherboard installers only. Overclocking can result in system instability or even shortening the life of the processor. CPU (MHz) 180 Frequency Selection Switches 5 [O N ] [OFF] [OFF] [O N ] [OFF] [O N ] [OFF] [O N ] [OFF] [OFF] [ON] [OFF] [ON] [OFF] [OFF] [ON] [OFF] [ON] [OFF] [ON] [OFF] [ON] [OFF] [ON] [OFF] [ON] [OFF] [ON] [OFF] [O N ] [O N ] [OFF] [O N ] [O N ] [OFF] [OFF] [O N ] [ON] [OFF] [ON] [O N ] [OFF] [OFF] [O N ] [OFF] [OFF] [ON] [O N ] [OFF] [OFF] [ON] [ON] [OFF] [OFF] [ON] [ON] [OFF] [OFF] [O N ] [O N ] [O N ] [OFF] [OFF] [OFF] [OFF] [O N ] [ON] [O N ] [OFF] [OFF] [OFF] [OFF] [O N ] [ON] [O N ] [OFF] [OFF] [OFF] [OFF] [ON] [ON] [ON] [O N ] [OFF] [OFF] [OFF] [OFF] [O N ] [O N ] [O N ] [O N ] [O N ] [O N ] [O N ] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [O N ] [ON] [O N ] [ON] [O N ] [ON] [ON] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [O N ] [O N ] [O N ] [O N ] [O N ] [O N ] [O N ] [O N ] [ON] [O N ] [ON] [O N ] [ON] [ON] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF]

For updated processor settings, visit ASUSs web site (see ASUS CONTACT INFORMATION)

3.5 System Memory (DIMM)

NOTE: No hardware or BIOS setup is required after adding or removing memory. This motherboard uses only Dual Inline Memory Modules (DIMMs). Sockets are available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random Access Memory (SDRAM) of 64, 128, 256, or 512MB with Serial Presence Detect (SPD). This chipset does not support ECC. However, ECC memory modules may still be used, but the ECC function will not be available. Memory speed setup is recommended through SDRAM Configuration in 4.4.1 Chip Configuration. IMPORTANT: 1. This motherboards chipset only supports 64Mbit and 128Mbit SDRAMs (see SDRAM Configurations). 32MxMbit support is for registered DIMMs only. 4MxMbit support is for unbufferred DIMMs only. 2. If more than one socket will be populated with DIMMs, the first socket in the order must be populated with higher-sized DIMMs (in MB). For example, DIMM1 DIMM3 DIMM2 DIMM4. Total memory size (in MB), however, of DIMM2 and DIMM4 must not be greater than DIMM1 and DIMM3 (DIMM1 + DIMM3 DIMM2 + DIMM4). SDRAM Configurations
Technology Configuration No. of Row No. of Col. Address Bits Address Bits 64Mbit 64Mbit 128Mbit 128Mbit 8Mx8 4Mx16 32Mx4 16Mx10 No. of Bank Address Bits Page Size 4KB 2KB 16KB 8KB
3. H/W SETUP System Memory 24

3.5.1 General DIMM Notes

This motherboard only supports SPD DIMMs. SDRAM chips are generally thinner with higher pin density than EDO (Extended Data Output) chips. BIOS shows SDRAM memory on bootup screen. Single-sided DIMMs come in 32, 64,128MB; double-sided come in 64, 128, 256, 512MB.
Install memory in any of the following sample combinations (for more possible combinations, refer to the next table, Possible DIMM Combinations):
Current DIMMs* 1 SS 1 DS 2 SS 2 DS 1 SS / 1DS 3 SS 3 DSx 2 SS / 1DS 2 DS / 1 SSx 4 SS 4 DSx 3 SSx / 1DS 2 SS / 2 DS Memory Size DIMM1

(Rows 0&1)

(Rows 2&3)

(Rows 1&0)

(Rows 3&2)

DS/2>SS SS>DS/2

1 SSx / 3 DS

Folding Universal Retention Mechanism (URM)

3. H/W SETUP CPU

3.6.2 Heatsinks
The recommended heatsinks (see section on recommended heatsinks for Pentium III / II processors for more information) for the boxed Pentium III / II and Celeron processors are those with three-pin fans that can be connected to the fan connectors on the motherboard. WARNING! Be sure that there is sufficient air circulation across the processors heatsink by regularly checking that your CPU fan is working. Without sufficient circulation, the processor could overheat and damage both the processor and the motherboard. You may install an auxiliary chassis fan, if necessary.
3.6.3 Installing the Processor
NOTE: The following assumes that your motherboard came with a folding URM. 1. Unlock the URMs Folding Support Arms: The folding support arms of the URM are locked when shipped. 3. H/W SETUP CPU 28

Locked Folding Support

To unlock the support arms, simply flip them up to an upright position.

Unlocked Folding Support

The URM is now ready for the installation of your processor.
2. Attach the Heatsink NOTE: If provided, you should follow the heatsink attachment instructions that came with your heatsink or processor. The following steps are provided only as a general guide and may not reflect those for your heatsink. Using SECC fan with Pentium II Push the two lock arms one direction to clamp the heatsink onto the processor and the other direction to release.

Lock Arm Lock Arm

Using SECC2 fan with Pentium III Insert the four heatsinks pins through the holes of the SECC2. Place the metal clip on the ends of the pins and slide until it locks into place.

Four Pins and metal clip

WARNING! Make sure the heatsink is mounted tightly against the SECC2, SECC, or SEPP; otherwise, the CPU will overheat. You may install an auxiliary fan to provide adequate circulation across the processors passive heatsink.
NOTE: The SEPP heatsink and fan (for Intel Celeron processors) is similar to the SECC2 heatsink and fan except that the clamping design is different.
3. Insert the SECC2/SECC/SEPP SECC with Pentium II only: Push the SECCs two locks inward until you hear a click (the picture in step 2 shows the locks in the outward position and inward in the picture below). With the heatsink facing the motherboards chipset, push the SECC2, SECC, or SEPP gently but firmly into the Slot 1 connector until it is fully inserted.

SECC2/SEPP

Push lock inward
CPU fan cable to fan connector

SECC Lock hole

4. Secure the SECC2/SECC/SEPP Secure the SECC2/SECC/SEPP in place by pushing the SECC2/SECC/SEPP until it is firmly seated on the Slot 1 connector. SECC with Pentium II only: The SECC locks should be outward when secured so that the lock shows through the retention mechanisms lock holes.

10) Floppy Disk Drive Connector (34-1pin FLOPPY) This connector supports the provided floppy drive ribbon cable. After connecting the single end to the board, connect the two plugs on the other end to the floppy drives. (Pin 5 is removed to prevent inserting in the wrong orientation when using ribbon cables with pin 5 plugged).

FLOPPY

NOTE: Orient the red markings on the floppy ribbon cable to PIN 1
P3C2000 Floppy Disk Drive Connector
11) Wake-On-LAN Connector (3-pin WOL_CON) This connector connects to a LAN card with a Wake-On-LAN output, such as the ASUS PCI-L101 Ethernet card (see 7. Appendix). The connector powers up the system when a wakeup packet or signal is received through the LAN card. IMPORTANT: This feature requires that Wake-On-Lan features are enabled (see 4.4.3 Power Management) and that your system has an ATX power supply with at least 720mA +5V standby power.
IMPORTANT: Requires an ATX power supply with at least 720mA +5 volt standby power

Ground

3. H/W SETUP Connectors 42

PME +5 Volt Standby

P3C2000 Wake-On-LAN Connector
12) Wake-On-Ring Connector (2-pin WOR) This connector connects to internal modem cards with a Wake-On-Ring output. The connector powers up the system when a ringup packet or signal is received through the internal modem card. NOTE: For external modems, Wake-On-Ring is detected through the COM port. IMPORTANT: This feature requires that Wake-On-Ring features are enabled (see 4.4.3 Power Management) and that your system has an ATX power supply with at least 720mA +5V standby power.

Ring# Ground

P3C2000 Wake-On-Ring Connector
13) IDE Activity LED (2-pin IDE) This connector supplies power to the cabinets IDE activity LED. Read and write activity by devices connected to the Primary or Secondary IDE connectors will cause the LED to light up.
TIP: If the case-mounted LED does not light, try reversing the 2-pin plug.

P3C2000 IDE Activity LED

14) Power Supply, CPU, Chassis Fan Connectors (3-pin PWR_FAN, CPU_, CHA_FAN) These connectors support cooling fans of 350mA (4.2 Watts) or less. Orientate the fans so that the heat sink fins allow airflow to go across the onboard heat sink(s) instead of the expansion slots. Depending on the fan manufacturer, the wiring and plug may be different. The red wire should be positive, while the black should be ground. Connect the fans plug to the board taking into consideration the polarity of the connector. NOTE: The Rotation signal is to be used only by a specially designed fan with rotation signal. The Rotations per Minute (RPM) can be monitored using ASUS PC Probe (see section 6. SOFTWARE REFERENCE) or Intel LDCM Utility. WARNING! The CPU and/or motherboard will overheat if there is no airflow across the CPU and onboard heatsinks. Damage may occur to the motherboard and/or the CPU fan if these pins are incorrectly used. These are not jumpers, do not place jumper caps over these pins.

3. H/W SETUP Connectors 48
3.9 Starting Up the First Time
1. After all connections are made, close the system case cover. 2. Be sure that all switches are off (in some systems, marked with ). 3. Connect the power supply cord into the power supply located on the back of your system case according to your system users manual. 4. Connect the power cord into a power outlet that is equipped with a surge protector. 5. You may then turn on your devices in the following order: a. Your monitor b. External SCSI devices (starting with the last device on the chain) c. Your system power. For ATX power supplies, you need to switch on the power supply as well as press the ATX power switch on the front of the case. 6. The power LED on the front panel of the system case will light. For ATX power supplies, the system LED will light when the ATX power switch is pressed. The LED on the monitor may light up or switch between orange and green after the systems if it complies with green standards or if it has a power standby feature. The system will then run power-on tests. While the tests are running, the BIOS will alarm beeps or additional messages will appear on the screen. If you do not see anything within 30 seconds from the time you turn on the power, the system may have failed a power-on test. Recheck your jumper settings and connections or call your retailer for assistance.

Award BIOS Beep Codes

Beep 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

3. H/W SETUP Powering Up

7. During power-on, hold down <Delete> to enter BIOS setup. Follow the instructions in 4. BIOS SETUP. * Powering Off your computer: You must first exit or shut down your operating system before switching off the power switch. For ATX power supplies, you can press the ATX power switch after exiting or shutting down your operating system. If you use Windows 9X, click the Start button, click Shut Down, and then click Shut down the computer? The power supply should turn off after Windows shuts down. NOTE: The message You can now safely turn off your computer will not appear when shutting down with ATX power supplies.
3. H/W SETUP Powering Up 50 ASUS P3C2000 Users Manual

4. BIOS SETUP

4.1 Managing and Updating Your BIOS
4.1.1 Upon First Use of the Computer System

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 lefthand 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 floppy disk. DO NOT copy AUTOEXEC.BAT & CONFIG.SYS to the disk. 2. Type COPY D:\AFLASH\AFLASH.EXE A:\ (assuming D is your CDROM drive) to copy AFLASH.EXE to the just created boot disk. NOTE: AFLASH works only in DOS mode. It will not work with DOS prompt in Windows and will not work with certain memory drivers that may be loaded when you boot from your hard drive. It is recommended that you reboot using a floppy. 3. Reboot your computer from the floppy disk. NOTE: BIOS setup must specify Floppy as the first item in the boot sequence. 4. In DOS mode, type A:\AFLASH <Enter> to run AFLASH.
IMPORTANT! If unknown is displayed 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 P3C2000 Users Manual 51
4. BIOS SETUP Updating BIOS
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 and then press <Enter>.
4.1.2 Updating BIOS Procedures
WARNING! Only update your BIOS if you have problems with your motherboard and you know that the new BIOS revision will solve your problems. Careless updating can result in your motherboard having more problems! 1. Download an updated ASUS BIOS file from the Internet (WWW or FTP) (see ASUS CONTACT INFORMATION on page 3 for details) and save to the disk you created earlier. 2. Boot from the disk you created earlier. 3. At the A:\ prompt, type AFLASH and then press <Enter>. 4. At the Main Menu, type 2 and 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:\XXXXX.XXX, and then press <Enter>. NOTE: To cancel this operation, press <Enter>.

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 in the left view) appears to the left of certain fields. This pointer indicates that a sub-menu can be launched from this field. A sub-menu contains additional options for a field parameter. To call up a submenu, simply move the highlight to the field and press <Enter>. The sub-menu will then immediately appear. Use the legend keys to enter values and move from field to field within a sub-menu just as you would within a menu. Use the <Esc> key to return to the main menu. Take some time to familiarize yourself with each of the legend keys and their corresponding functions. Practice navigating through the various menus and submenus. If you accidentally make unwanted changes to any of the fields, use the set default hot key <F5>. 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. NOTE: The item heading in square brackets represents the default setting for that field.
4. BIOS SETUP Menu Introduction

4.3 Main Menu

When the Setup program is accessed, the following screen appears:
System Time [XX:XX:XX] Sets your 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 your 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: (100 year range). Use the <Tab> or <Shift> + <Tab> keys to move between the month, day, and year fields. Legacy Diskette A [1.44M, 3.5 in.], Legacy Diskette B [None] Sets the type of floppy drives 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. Floppy 3 Mode support will allow reading and writing of 1.2MB (as opposed to 1.44MB) on a 3.5-inch diskette. Configuration options: [Disabled] [Drive A] [Drive B] [Both]

Other options for Type: are: [CD-ROM] - for IDE CD-ROM drives [LS-120] - for LS-120 compatible floppy disk drives [ZIP-100] - for ZIP-100 compatible disk drives [MO] - for IDE magneto optical disk drives [Other ATAPI Device] - for IDE devices not listed here After using the legend keys to make your selections on this sub-menu, press the <Esc> key to exit back to the Main menu. When the Main menu appears, you will notice that the drive size appear in the field for the hard disk drive that you just configured.

4.3.2 Keyboard Features

4. BIOS SETUP Main Menu 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 [12/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] 62 ASUS P3C2000 Users Manual
Language [English] This allows selection of the BIOS displayed language. Currently only English is available. Supervisor Password [Disabled] / User Password [Disabled] These fields allow you to set the passwords. To set the password, highlight the appropriate field and press <Enter>. Type in a password and press <Enter>. You can type up to eight alphanumeric characters. Symbols and other keys are ignored. To confirm the password, type the password again and press the <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 will appear. Press <Enter> and the password will be 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. The passwords are not case sensitive. In other words, it makes no difference whether you enter a password using upper or lowercase letters. The BIOS Setup program allows you to specify two separate passwords: a Supervisor password and a User password. When disabled, anyone may access all BIOS Setup program functions. When enabled, the Supervisor password is required for entering the BIOS Setup program and having full access to all configuration fields. Forgot the Password? If you forgot the password, you can clear the password by erasing the CMOS Real Time Clock (RTC) RAM. The RAM data containing the password information is powered by the onboard button cell battery. To erase the RTC RAM: (1) Unplug your computer, (2) Short the solder points, (3) Turn ON your computer, (4) Hold down <Delete> during bootup and enter BIOS setup to re-enter user preferences.

4. BIOS SETUP Advanced Menu
USB Legacy Support [Auto] This motherboard supports Universal Serial Bus (USB) devices. The default of [Auto] allows the system to detect a USB device on startup. If detected, the USB controller will be enabled. If not detected, the USB controller will be disabled. When this field is set to [Disabled], the USB controller is disabled no matter whether you are using a USB device or not. 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 this on [Disabled]. Configuration options: [Disabled] [Enabled]
Notes for JumperFree Mode
CPU Upgrade/Reinstallation To ensure that your system can enter BIOS setup after the processor has been changed or reinstalled, your system will start up running at a bus speed of 100MHz and a fail-safe CPU internal frequency (4x100MHz for the Intel Coppermine processor or 2x100MHz for non-Coppermine processors). It will then automatically take you to the Advanced menu with a popup menu of all the officially possible CPU internal frequencies.
4. BIOS SETUP JumperFree Mode 66
For processors with locked frequency multiplier
For processors with unlocked frequency multiplier System Hangup If your system crashes or hangs due to improper frequency settings, power OFF your system and restart. The system will start up in safe mode running at a bus speed of 100MHz and enter BIOS setup.
Cause for Hangup: Improper CPU Internal Frequency
Cause for Hangup: Improper CPU Frequency Multiple (For processors with unlocked frequency multiplier only)
Cause for Hangup: Improper CPU External (FSB) Freq. (MHz) ASUS P3C2000 Users Manual 67
4. BIOS SETUP JumperFree Mode

4.4.1 Chip Configuration

SDRAM Configuration [By SPD] This sets the optimal timings for items 24, depending on the memory modules that you are using. Default setting is [By SPD], which configures items 24 by reading the contents in the SPD (Serial Presence Detect) device. The EEPROM on the memory module stores critical parameter information about the module, such as memory type, size, speed, voltage interface, and module banks. Configuration options: [User Define] [By SPD] SDRAM CAS Latency This controls the latency between the SDRAM read command and the time that the data actually becomes available. NOTE: This field will only be displayed when SDRAM Configuration is set to [User Define]. SDRAM RAS to CAS Delay This controls the latency between the SDRAM active command and the read/write command. NOTE: This field will only be displayed when SDRAM Configuration is set to [User Define]. SDRAM RAS Precharge Time This controls the idle clocks after issuing a precharge command to the SDRAM. NOTE: This field will only be displayed when SDRAM Configuration is set to [User Define].

4. BIOS SETUP Chip Configuration 68
SDRAM MA Wait State [Normal] This controls the leadoff clocks for CPU read cycles. Leave on default setting. Configuration options: [Fast] [Normal] Graphics Window 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] 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 cannot support this feature; otherwise your 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 that require it. Setting the address space to a particular setting will make that memory space unavailable to the system. Expansion cards can only access memory up to 16MB. Configuration options: [Disabled] [Enabled] PCI 2.1 Support [Enabled] This function allows you to enable or disable PCI 2.1 features including passive release and delayed transaction. Configuration options: [Disabled] [Enabled] High Priority PCI Mode [Enabled] This field allows you to give PCI slot 1 a higher priority. You may want to leave on the default setting if you are using an IEEE-1394 PCI card. Configuration options: [Disabled] [Enabled] Onboard PCI IDE Enable [Both] You can select to enable the primary IDE channel, secondary IDE channel, both, or disable both channels. Configuration options: [Both] [Primary] [Secondary] [Disabled] Onboard ISA Bridge [Enabled] If you are not using any ISA cards, you may disable this field. When this field is disabled, the 8-bit and 16-bit I/O Recovery Time configurations will not be available. Configuration options: [Disabled] [Enabled] 8-bit, 16-bit I/O Recovery Time [3.5 BUSCLK] Leave on default setting.
4. BIOS SETUP Chip Configuration
4.4.2 I/O Device Configuration
(scroll down to see more items, as shown here) Onboard AC97 Modem Controller, Audio Controller [Auto] [Auto] allows the motherboards BIOS to detect whether you are using any modem/ audio device. If a modem/audio device is detected, the onboard modem/audio controller will be enabled; if no modem/audio device is detected, the onboard modem/audio controller will be disabled. If you have conflicts with the onboard modem/audio controller, you may set the appropriate field to [Disabled]. Configuration options: [Disabled] [Auto] Onboard FDC Swap A & B [No Swap] This field allows you to reverse the hardware drive letter assignments of your floppy disk drives. Configuration options: [No Swap] [Swap AB] Floppy Disk Access Control [R/W] When set to [Read Only], this field protects files from being copied to floppy disks by allowing reads from the floppy disk drive but not writes. The setup default [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] 70 ASUS P3C2000 Users Manual

4. BIOS SETUP PCI Configuration 74
PCI/PNP ISA UMB Resource Exclusion
ISA MEM Block BASE [No/ICU] This field allows you to set the base address and block size of a legacy ISA card that uses any memory segment within the C800 and DFFF address range. If you have such a card and you are not using an ICU to specify its address range, select a base address from the six available options; the ISA MEM Block SIZE field will then appear for selecting the block size. If you have more than one legacy ISA card in your system that requires the use of this address range, you can increase the block size to 8K, 16K, 32K, or 64K. If you are using an ICU to accomplish this task, leave ISA MEM Block BASE to its default setting of [No/ICU]. Configuration options: [No/ICU] [C800] [CC00] [D000] [D400] [D800] [DC00]
4.4.4 Shadow Configuration
Video ROM BIOS Shadow [Enabled] This field allows you to change the video BIOS location from ROM to RAM. Relocating to RAM enhances system performance, as information access is faster than the ROM. Configuration options: [Disabled] [Enabled] C8000-DFFFF Shadow [Disabled] These fields are used for shadowing other expansion card ROMs. If you install other expansion cards with ROMs on them, you will need to know which addresses the ROMs use to shadow them specifically. Shadowing a ROM reduces the memory available between 640K and 1024K by the amount used for this purpose. Configuration options: [Disabled] [Enabled]

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 Define] This option must be enabled to use any of the automatic power saving features. If this menu item is set to [Disabled], power management features will not function regardless of other field settings on this menu. The [User Define] option allows you to make your own selections in the Power menu. When set to [Max Saving], system power will be conserved to its greatest amount. The Suspend Mode field will then be set to predefined value that ensures maximum power savings. This field acts as the master control for the power management modes. [Max Saving] puts the system into power saving mode after a brief period of system inactivity; [Min Saving] is almost the same as [Max Saving] except that the system inactivity period is longer; [Disabled] disables the power saving features; [User Define] allows you to set power saving options according to your preference. Configuration options: [User Define] [Disabled] [Min Saving] [Max Saving] IMPORTANT: Advanced Power Management (APM) should be installed to keep the system time updated when the computer enters suspend mode activated by the BIOS Power Management. For DOS environments, you need to add the statement, DEVICE=C:\DOS\POWER.EXE, to your CONFIG.SYS file. For Windows 3.x and Windows 95, you need to install Windows with the APM feature. For Windows 98 and later, APM is automatically installed. A battery and power cord icon labeled Power Management will appear in the Control Panel. Choose Advanced in the Power Management Properties dialog box. 76 ASUS P3C2000 Users Manual