Asus P2-99B User manual

R
P2-99B
Pentium®III / II / CeleronTM Motherboard
USER’S MANUAL

ASUS P2-99B User’s Manual
2
USER'S NOTICE
Product Name: ASUS P2-99B
Manual Revision: 1.01 E388
Release Date: May 1999
No part of this manual, including the products and software described in it, may be repro-
duced, 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”).
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 MERCHANTABILITYOR FITNESS FORAPAR-
TICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS,
EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDEN-
TAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF
PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSI-
NESS 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.
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 byASUS; or (2)
the serial number of the product is defaced or missing.
Products and corporate names appearing in this manual may or may not be registered trade-
marks or copyrights of their respective companies, and are used only for identification or
explanation and to the owners’ benefit, without intent to infringe.
• Intel, LANDesk, and Pentium are registered trademarks of Intel Corporation.
• Celeron is a trademark of Intel Corporation.
• IBM and OS/2 are registered trademarks of International Business Machines.
• Symbios is a registered trademark of Symbios Logic Corporation.
• Windows and MS-DOS are registered trademarks of Microsoft Corporation.
• Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.
The product name and revision number are both printed on the product itself. Manual revi-
sions are released for each product design represented by the digit before and after the period
of the manual revision number. Manual updates are represented by the third digit in the manual
revision number.
For previous or updated manuals, BIOS, drivers, or product release information, contactASUS
at http://www.asus.com.tw or through any of the means indicated on the following page.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FUR-
NISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT
ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COM-
MITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR
ANYERRORS OR INACCURACIESTHATMAYAPPEARINTHISMANUAL,INCLUD-
ING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Copyright ©1999ASUSTeK COMPUTER INC. All Rights Reserved.

ASUS P2-99B User’s Manual 3
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC. (Asia-Pacific)
Marketing
Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support
Tel (English): [phone] ext. 706
Tel (Chinese): [phone] ext. 111
Fax: [phone]
Email: [email protected]
Newsgroup: news2.asus.com.tw
WWW: www.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER INTERNATIONAL (America)
Marketing
Address: 6737 Mowry Avenue, Mowry Business Center, Building 2
Newark, CA 94560, USA
Fax: [phone]
Email: [email protected]
Technical Support
Fax: [phone]
BBS: [phone]
Email: [email protected]
WWW: www.asus.com
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER GmbH (Europe)
Marketing
Address: Harkort Str. 25, 40880 Ratingen, BRD, Germany
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support
Hotline: [phone]
BBS: 49-2102-448690
Email: [email protected]
WWW: www.asuscom.de
FTP: ftp.asuscom.de/pub/ASUSCOM

ASUS P2-99B User’s Manual
4
CONTENTS
I. INTRODUCTION............................................................................... 7
How This Manual Is Organized .......................................................... 7
Item Checklist ..................................................................................... 7
II. FEATURES ........................................................................................ 8
Features of the ASUS P2-99B Motherboard....................................... 8
The ASUS P2-99B Motherboard ................................................ 11
III. HARDWARE SETUP.................................................................... 12
Layout of the ASUS P2-99B Motherboard....................................... 12
Hardware Setup Steps ....................................................................... 14
1. Motherboard Settings.................................................................... 14
Jumpers ....................................................................................... 14
SPD Support .......................................................................... 18
2. System Memory (DIMM) ............................................................. 18
DIMM Memory Installation Procedures: .............................. 18
3. Central Processing Unit (CPU).................................................... 21
Universal Retention Mechanism ........................................... 21
Heatsinks ............................................................................... 21
Installing the Processor ............................................................... 22
ASUS Smart Thermal Solutions
(only for motherboards with hardware monitor) ............. 24
Recommended Heatsinks for Slot 1 Processors .................... 25
4. Expansion Cards ........................................................................... 26
Expansion Card Installation Procedure ................................. 26
Assigning IRQs for Expansion Cards.................................... 26
Assigning DMA Channels for ISA Cards.............................. 27
ISA Cards and Hardware Monitor ......................................... 27
Accelerated Graphics Port (AGP) ......................................... 27
5. External Connectors..................................................................... 28
Power Connection Procedures .......................................................... 37
IV. BIOS SETUP................................................................................... 38
Flash Memory Writer Utility ............................................................ 38
Main Menu .................................................................................. 38
Managing and Updating Your Motherboard’s BIOS................... 40
6. BIOS Setup .................................................................................. 41
Load Defaults ........................................................................ 42
Standard CMOS Setup ................................................................ 42
Details of Standard CMOS Setup:......................................... 42

ASUS P2-99B User’s Manual 5
CONTENTS
BIOS Features Setup ................................................................... 45
Details of BIOS Features Setup............................................. 45
Chipset Features Setup ................................................................ 48
Details of Chipset Features Setup.......................................... 48
Power Management Setup........................................................... 51
Details of Power Management Setup .................................... 51
PNP and PCI Setup ..................................................................... 54
Details of PNP and PCI Setup ............................................... 54
Load BIOS Defaults .................................................................... 56
Load Setup Defaults .................................................................... 56
Supervisor Password and User Password ................................... 57
IDE HDD Auto Detection ........................................................... 58
Save & Exit Setup ....................................................................... 60
Exit Without Saving .................................................................... 60
V. SOFTWARE SETUP ....................................................................... 61
ASUS Smart Motherboard Support CD............................................ 61
Installation Submenu ............................................................. 62
DOS Utility Submenu............................................................ 63
ASUS Contact Information ................................................... 64
Uninstalling Programs ...................................................................... 65
VI. SOFTWARE REFERENCE.......................................................... 67
ASUS PC Probe (only w/ optional hardware monitor)..................... 67
Intel LANDesk Client Manager
(only w/ optional hardware monitor) .......................................... 72
Desktop Management Interface (DMI)............................................. 78
VII. APPENDIX.................................................................................... 81
The ASUS CIDB Chassis Intrusion Sensor Module......................... 81
The ASUS S370 CPU Card .............................................................. 83
ASUS PCI-L101 Fast Ethernet Card ................................................ 85
Glossary ............................................................................................ 87

ASUS P2-99B User’s Manual
6
FCC & DOC COMPLIANCE
FederalCommunicationsCommission 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 installa-
tion. 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 inter-
ference by one or more of the following measures:
• Re-orient 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.
WARNING! 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.
CanadianDepartmentof 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 Cana-
dian Department of Communications.

ASUS P2-99B User’s Manual 7
I. INTRODUCTION
I.INTRODUCTION
Manual / Checklist
How This Manual Is Organized
This manual is divided into the following sections:
I. Introduction Manual information and checklist
II. Features Information and specifications concerning this product
III. Hardware Setup Instructions on setting up the motherboard and jumpers
IV. BIOS Setup Instructions on setting up the BIOS software
V. Software Setup Instructions on setting up the included support software
VI. Software Reference Reference material for the included support software
VII. Appendix Optional items and general reference
Item Checklist
Please check that your package is complete. If you discover damaged or missing
items, please contact your retailer.
(1) ASUS Motherboard
(1) Universal Retention Mechanism for SECC2/SECC/SEPP Processors
(1) Ribbon cable for master and slave IDE drives
(1) Ribbon cable for (1) 5.25” and (2) 3.5” floppy disk drives
(1) Serial cable connector set
(1) Parallel + PS/2 mouse connector set
(1) Bag of spare jumper caps
(1) Support CD with drivers and utilities
(1) This Motherboard User’s Manual
ASUS IrDA-compliant infrared module (optional)
ASUS USB/MIR module (optional)
ASUS CIDB chassis sensor module (optional)
ASUS S370 CPU card (optional)
ASUS PCI-L101 Wake-On-LAN 10/100 Ethernet Card (optional)

8ASUS P2-99B User’s Manual
Features of the ASUS P2-99B Motherboard
The ASUS P2-99B is carefully designed for the demanding PC user who wants
advanced features processed by the fastest CPU.
Specifications:
•Multi-Speed: Supports Intel Pentium
®
III (450MHz and faster), Pentium
®
II
(233MHz to 450MHz), and Celeron
TM
(266MHz and faster) processors.
•Intel AGPset: Features Intel’s 440ZX AGPset with I/O subsystems and front-
side bus (FSB) platform, which boosts the traditional 66MHz internal bus speed
to 100MHz.
•Multi-Cache:Supports processors with 512, 128, or 0KB Pipelined Burst Level
2 cache.
•PC100 Memory Support: Equipped with three DIMM sockets to support Intel
PC100-compliant SDRAMs up to 512MB. These new SDRAMs are necessary
to meet the critical enhanced 100MHz bus speed requirement.
•Peripheral Wake Up: Supports modem wake up, keyboard wake up, and LAN
card wake up functions from sleep or soft-off mode.
•Thermal Sensor Connector with Optional Sensor (only w/hardware monitor):
AccuratelydetectstheCPUtemperaturewiththeASUSSmartFanortheIntel boxed
processor heatsink with fan when connected to an optionalASUS P2T-Cable.
•PCHealthMonitoring(optional):Provides an easier way to examine and man-
age system status information such as CPU and system voltages, temperatures,
and fan status through the onboard hardware monitor ASIC and the bundled
LDCM by Intel or PC Probe from ASUS.
•AGP Slot: Supports an Accelerated Graphics Port card for high performance,
component level interconnect targeted at 3D graphical display applications us-
ing a 1X or 2X mode bus.
•SB-Link™: Features Creative’s SB-Link™, allowing SB16 compatibility, us-
ing Intel’s PC-PCI DMA and serialized IRQ protocols, to AWE64D or compat-
ible PCI audio cards.
•SMBus:Features the System Management Bus interface, which is used to physi-
cally transport commands and information between SMBus devices.
•PCI & ISA Expansion Slots: Provides three 32-bit PCI and two 16-bit ISA
slots.
•Multi-I/O:Provides two high-speed UART compatible serial ports and one par-
allel port with EPP and ECP capabilities. UART2 can also be directed from
COM2 to the Infrared Module for wireless connections.
•UltraDMA/33 Bus Master IDE: Comes with an onboard PCI Bus Master IDE
controller with two connectors that support four IDE devices in two channels,
supports UltraDMA/33, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2,
and supports Enhanced IDE devices, such as Tape Backup and CD-ROM, CD-
R, CD-RW and LS-120 drives.
II. FEATURES
Specifications
II.FEATURES

ASUS P2-99B User’s Manual 9
Special Features:
•EnhancedACPI andAnti-Boot Virus BIOS: Features a programmable BIOS,
offering enhancedACPI for Windows 98 compatibility, built-in firmware-based
virus protection throughTrend ChipAway Virus codes, and autodetection of most
devices for virtually automatic setup.
• Desktop Management Interface (DMI): Supports DMI through BIOS, which
allows hardware to communicate within a standard protocol creating a higher
level of compatibility. (Requires DMI-enabled components.)
• Easy Installation: Incorporates BIOS that supports autodetection of hard disk
drives, PS/2 mouse, and Plug and Play devices to make the setup of hard disk
drives, expansion cards, and other devices virtually automatic.
• PC’98 Compliant: Both the BIOS and hardware levels ofASUS smart series of
motherboards meet PC’98 compliancy. The new PC’98 requirements for sys-
tems and components are based on the following high-level goals: Support for
Plug and Play compatibility and power management for configuring and man-
aging all system components, and 32-bit device drivers and installation proce-
dures for Windows 95/98/NT.
•Symbios SCSI BIOS: Supports optional ASUS SCSI controller cards through
onboard SYMBIOS firmware.
Performance Features:
•Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI mas-
ter busses to the memory and processor.
• Double the IDE Transfer Speed: ASUS smart series motherboards with Intel
chipsets improves IDE transfer rate using Bus Master UltraDMA/33 IDE which
can handle data transfer up to 33MB/s. The best of all is that this new technol-
ogy is compatible with existingATA-2 IDE specs so there is no need to upgrade
current hard drives or cables.
• SDRAMOptimizedPerformance:Supports the new generation memory - Syn-
chronous Dynamic RandomAccess Memory (SDRAM) which increases the data
transfer rate to 800MB/s max using PC100-compliant SDRAM.
II. FEATURES
II.FEATURES
Specifications
•Universal Retention Mechanism: Supports a Pentium
®
III / II processor pack-
aged in a Single Edge Contact Cartridge (SECC2/SECC) or a Celeron
TM
proces-
sor packaged in a Single Edge Processor Package (SEPP).
•Wake-On-LAN: Supports Wake-On-LAN activity through an optional ASUS
PCI-L101 10/100 Fast Ethernet PCI card (SeeAPPENDIX) or a similar ethernet
card.
•IrDA: Supports an optional infrared port module for a wireless interface.

10 ASUS P2-99B User’s Manual
II. FEATURES
Specifications
II.FEATURES
Intelligent Features:
• Auto Fan Off: The system fans will power off automatically even in sleep
mode.This function reduces both energy consumption and system noise, and is
an important feature in implementing silent PC systems.
• Dual Function Power Button: Pushing the power button for less than 4 sec-
onds when the system is in the working state places the system into one of two
states: sleep mode or soft-off mode, depending on the BIOS setting (see Power
Management Setup under BIOS SETUP). When the power button is pressed for
more than 4 seconds, the system enters the soft-off mode regardless of the BIOS
setting.
• Fan Status Monitoring andAlarm (only w/optional hardware monitor): To
prevent system overheat and system damage, the CPU, power supply, and sys-
tem fans can be monitored for RPM and failure. All fans are set for its normal
RPM range and alarm thresholds.
• Keyboard Power Up: Keyboard Power Up can be enabled or disabled to allow
the computer to be powered on using your keyboard.
• Message LED (requiresACPI OS support): Turbo LEDs now act as informa-
tion providers. Through the way a particular LED illuminates, the user can de-
termine the stage the computer is in.Asimple glimpse provides useful informa-
tion to the user.
• Remote Ring On (requires external modem): This allows a computer to be
turned on remotely through an external modem. With this benefit on-hand, any
usercan access vitalinformationfrom their computerfromanywhere in the world!
• System ResourcesAlert (only w/optional hardware monitor):Today’s oper-
ating systems such asWindows 95/98/NTand OS/2, require much more memory
and hard drive space to present enormous user interfaces and run large applica-
tions. The system resource monitor will warn the user before the system re-
sources are used up to prevent possible application crashes. Suggestions will
give the user information on managing their limited resources more efficiently.
•Temperature Monitoring and Alert (only w/optional hardware monitor):
To prevent system overheat and system damage, there are heat sensors to moni-
tor the CPU (the Pentium III / II processor requires a special heatsink with a
thermal sensor) and system temperatures to warn of damaging temperatures.
•Voltage Monitoring andAlert (only w/optional hardware monitor): System
voltage levels are monitored to ensure stable voltage to critical motherboard
components. Voltage specifications are more critical for future processors, so
monitoring is necessary to ensure proper system configuration and management.
•Chassis Intrusion Detection (only w/optional hardware monitor): Supports
chassis-intrusion monitoring through the optionalASUS CIDB module and Intel
LDCM.

ASUS P2-99B User’s Manual 11
The ASUS P2-99B Motherboard
II. FEATURES
II.FEATURES
Motherboard Parts
Keyboard
3 PCI Slots
2 ISA Slots Programmable
Flash EEPROM
Intel PIIX4E
PCIset
Multi-I/O
3 DIMM Sockets
Intel 440ZX
AGPset IDE
Connectors
Slot 1
Serial Ports
COM1 & COM2
AGP Port
Wake-On-LAN
Connector Wake-On-Ring Connector
Hardware Monitor
(optional)
ATX PowerAT Power
USB/MIR
Parallel Port
Floppy
Connector

12 ASUS P2-99B User’s Manual
III. HARDWARE SETUP
Layout of the ASUS P2-99B Motherboard
Serial Ports
FLOPPY
PARALLEL
KBPWR
ISA Slot 1
ISA Slot 2
Accelerated Graphics Port
Multi
I/O
Intel
PIIX4E
PCIset
ASUS
ASIC
AT Power Connector
ATX Power Connector
SECONDARY IDE
PRIMARY IDE
Slot 1
Hardware
Monitor
KB-PS2KB
ATXPWR
PS/2
USB/MIR
SBLINK
CHASIS
Keyboard
CR2032 3V
Lithium Cell
CMOS Power
2Mbit Flash EEPROM
(Programmable BIOS)
VCORE
P2-99B
R
WOR
DIMM Socket 3 (64/72-bit, 168-pin module)
PANEL
IR
COM 2
COM 1
IDELED
PWR_FAN
CHA_FAN
CPU_FAN
Wake-On-LAN
(WOL_CON)
FREQ MULT
BUS FREQ
BF1 BF2 BF0 BF3
P8
P9
RT3
PCI Slot 1 (PCI1)
PCI Slot 2 (PCI2)
PCI Slot 3 (PCI3)
DIMM Socket 1 (64/72-bit, 168-pin module)
DIMM Socket 2 (64/72-bit, 168-pin module)
Intel
440ZX
AGPset
Row
3
2
1
0
5
4
FS1
FS2
FS0
FS3
VIO
SMB
RT2
CLRTC
Motherboard Layout
III.H/WSETUP
(The grayed items are optional at the time of purchase.)

ASUS P2-99B User’s Manual 13
III. HARDWARE SETUP
Motherboard Settings
1) KBPWR p. 14 Keyboard Power Up
2) VIO p. 15 VIO Selection
3) VCORE p. 15 Voltage Regulator Output Selection
4) FS0, FS1, FS2, FS3 p. 16 CPU External Frequency Selection
5) BF0, BF1, BF2, BF3 p. 16 CPU Core:External Frequency Multiple
Expansion Slots/Sockets
1) System Memory p. 18 System Memory Support
2) DIMM Sockets p. 19 DIMM Memory Module Support
3) Slot 1 p. 21 CPU Support
4) SLOT1, SLOT2 p. 26 16-bit ISA Bus Expansion Slots
*
5) PCI1, PCI2, PCI3 p. 26 32-bit PCI Bus Expansion Slots
6) AGP p.27 Accelerated Graphics Port
Hardware Monitor (optional)
1) RT2, RT3 p.25 Thermal Sensor Connectors
Connectors
1) KB-PS2KB p. 28 Keyboard Port Connector (6-pin female)
2) FLOPPY p. 28 Floppy Disk Drive Connector (34-1 pins)
3) PARALLEL p. 29 Parallel Port Connector (25-pin female)
4) COM1, COM2 p. 29 Serial Port Headers (9-pin male)
5) PRIMARY/SECONDARY IDE p. 30 Primary/Secondary IDE Connectors (Two 40-1pins)
6) IDELED p. 30 IDE Activity LED Lead (2 pins)
7) CHA_, CPU_, PWR_FAN p.31 Chassis,CPU,PowerSupplyFanConnectors(Three3-pin)
8) WOL_CON p. 31 Wake-On-LAN Connector (3 pins)
9) MSG.LED (PANEL) p. 32 System Message LED Lead (2 pins)
10) SMI (PANEL) p. 32 System Management Interrupt Switch Lead (2 pins)
11) PWR.SW (PANEL) p. 32 ATX Power & Soft-Off Switch Lead (2 pins)
12) RESET (PANEL) p. 32 Reset Switch Lead (2 pins)
13) PWR.LED ( PANEL ) p. 32 System Power LED Lead (3-1 pins)
14) KEYLOCK ( PANEL ) p. 32 Keyboard Lock Switch Lead (2 pins)
15) SPEAKER (PANEL) p. 32 System Warning Speaker Connector (4 pins)
16) USB/MIR P. 33 USB, Infrared, PS/2 Module Connector (18-1 pins)
17) IR p. 33 IrDA-Compliant Infrared Module Connector (5 pins)
18) WOR p. 34 Wake-On-Ring Connector (2 pins)
19) CHASIS p. 34 Chassis Intrusion Sensor Lead (4-1 pins)
20) SBLINK p. 35 SB-Link
TM
Connector (6-1 pins)
21) SMB p. 35 SMBus Connector (5-1 pins)
22) ATXPWR p. 36 ATX Power Supply Connector (20 pins)
23) PS/2 p. 36 AT Power Supply Connector (20 pins)
*
The optional onboard hardware monitor uses the address 290H-297H so legacy ISA cards
must not use this address otherwise conflicts will occur.
Layout Contents
III.H/WSETUP

14 ASUS P2-99B User’s Manual
III. HARDWARE SETUP
Motherboard Settings
III.H/WSETUP
Hardware Setup Steps
Before using your computer, you must complete the following steps:
1. Check Motherboard Settings
2. Install Memory Modules
3. Install the Central Processing Unit (CPU)
4. Install Expansion Cards
5. Connect Ribbon Cables, Panel Wires, and Power Supply
6. Setup the BIOS Software
1. Motherboard Settings
This section explains in detail how to change your motherboard’s function settings
through the use of switches and/or jumpers.
WARNING! Computer motherboards and expansion cards contain very delicate
Integrated Circuit (IC) chips. To protect them against damage from static electric-
ity, you should follow some precautions whenever you work on your computer.
1. Unplug your computer when working on the inside.
2. Use a grounded wrist strap before handling computer components. If you do
not have one, touch both of your hands to a safely grounded object or to a
metal object, such as the power supply case.
3. Hold components by the edges and try not to touch the IC chips, leads or
connectors, or other components.
4. Place components on a grounded antistatic pad or on the bag that came with
the component whenever the components are separated from the system.
Jumpers
1. Keyboard Power Up (KBPWR)
This allows you to disable or enable the keyboard power up function. Set to
Enable if you want to use your keyboard (by pressing <Spacebar> or any key,
depending on your motherboard) to power up your computer. This feature re-
quires anATX power supply that can supply at least 300mAon the +5VSB lead.
The default is set to Disable because not all computers have the appropriate
ATX power supply. Your computer will not function if you set this to Enable
and if you do not have the appropriate ATX power supply.
P2-99B Keyboard Power Up
Disable
(Default)
KBPWR
Enable
123123
R
P2-99B

ASUS P2-99B User’s Manual 15
III. HARDWARE SETUP
III.H/WSETUP
Motherboard Settings
2. Voltage Input/Output Selection (VIO)
This jumper allows you to select the voltage supplied to the DRAM, chipset,
AGP, and the CPU’s I/O buffer.
P2-99B Voltage Input/Output Selection
VIO
3.66Volts
1 2 3
3.50Volts
(Default)
1 2 3
R
P2-99B
3. Voltage Regulator Output Selection (VCORE)
This jumper sets the core voltage supplied to the microprocessor.
P2-99B CPU CoreVoltage Selection
Test
1 2 3
Normal
(Default)
1 2 3
R
P2-99B
VCORE
WARNING! Using a higher voltage Test for VCORE or 3.66Volts for VIO may
help when overclocking but may result in the shortening of your computer
component’s life. It is strongly recommended that you leave these jumpers on
their default settings.

16 ASUS P2-99B User’s Manual
III. HARDWARE SETUP
Motherboard Settings
III.H/WSETUP
4. CPU External Frequency Selection (FS0, FS1, FS2, FS3)
This option tells the clock generator what frequency to send to the CPU, DRAM, and
440ZX AGPset.This allows the selection of the CPU’s External frequency. The CPU
External FrequencymultipliedbytheFrequency MultipleequalstheCPU’sInternal
frequency (the advertised CPU speed).
P2-99B CPU
External Frequency Selection
R
P2-99B
103.00MHz
34.33MHz
123
100.30MHz
33.43MHz
123
83.30MHz
41.65MHz
123
75.0MHz
37.5MHz
123
66.8MHz
33.4MHz
123
150.0MHz
37.5MHz
123
140.0MHz
35.0MHz
123
133.00MHz
44.33MHz
123
133.0MHz
33.3MHz
123
124.0MHz
31.0MHz
123
120.0MHz
40.0MHz
123
115.00MHz
38.33MHz
123
CPU
PCI
FS0
FS1
FS2
FS3
110.00MHz
36.67MHz
123
112.00MHz
37.33MHz
123
105.0MHz
35.0MHz
123
CPU
PCI
FS0
FS1
FS2
FS3
CPU
PCI
FS0
FS1
FS2
FS3
5. CPU Core:External Frequency Multiple (BF0, BF1, BF2, BF3)
This option sets the frequency multiple between the Internal frequency of the
CPU and the CPU’s External frequency. These must be set in conjunction with the
CPU External Frequency.
P2-99B CPU Core-to-Bus Frequency Multiple Settings
R
P2-99B
BF1 BF2 BF0 BF3
2.0x(2/1)
1
2
3
2.5x(75/2) 3.0x(3/1) 3.5x(7/2)
BF1 BF2 BF0 BF3 BF1 BF2 BF0 BF3 BF1 BF2 BF0 BF3
4.0x(4/1)
BF1 BF2 BF0 BF3
6.5x(13/2)
BF1 BF2 BF0 BF3
1
2
3
6.0x(6/1)
BF1 BF2 BF0 BF3
5.5x(11/2)
BF1 BF2 BF0 BF3
5.0x(5/1)
BF1 BF2 BF0 BF3
4.5x(9/2)
BF1 BF2 BF0 BF3
1
2
3
7.0x(7/1)
BF1 BF2 BF0 BF3
7.5x(15/2)
BF1 BF2 BF0 BF3
8.0x(8/1)
BF1 BF2 BF0 BF3
WARNING! Frequencies above 100MHz exceed the specifications for the on-
board Intel Chipset and are not guaranteed to be stable.

ASUS P2-99B User’s Manual 17
NOTES:Overclocking your processor is not recommended. It may result in a slower
speed. Voltage Regulator Output Selection (VID) is not required for Pentium III / II/
Celeron processors because they send VID signals directly to the onboard power
controller.
Set the jumpers by the Internal speed of your processor asfollows:
(CPU Ext. Freq.) (Freq. Multiple)
Intel CPU Model Freq. Mult. Ext. Freq. FS0 FS1 FS2 FS3 BF0 BF1 BF2 BF3
Pentium III 550MHz 5.5x 100MHz [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [1-2] [2-3]
Pentium III 500MHz 5.0x 100MHz [1-2] [1-2] [1-2] [2-3] [2-3] [1-2] [1-2] [2-3]
Pentium III / II 450MHz 4.5x 100MHz [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2] [2-3]
Pentium II 400MHz 4.0x 100MHz [1-2] [1-2] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3]
Pentium II 350MHz 3.5x 100MHz [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [2-3] [2-3]
Celeron 466MHz 7.0x 66MHz [1-2] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2]
Celeron 433MHz 6.5x 66MHz [1-2] [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2]
Celeron 400MHz 6.0x 66MHz [1-2] [1-2] [2-3] [2-3] [2-3] [2-3] [2-3] [1-2]
Celeron 366MHz 5.5x 66MHz [1-2] [1-2] [2-3] [2-3] [1-2] [1-2] [1-2] [2-3]
Pentium II/Celeron 333MHz 5.0x 66MHz [1-2] [1-2] [2-3] [2-3] [2-3] [1-2] [1-2] [2-3]
Pentium II/Celeron 300MHz 4.5x 66MHz [1-2] [1-2] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3]
Pentium II/Celeron 266MHz 4.0x 66MHz [1-2] [1-2] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3]
Pentium II 233MHz 3.5x 66MHz [1-2] [1-2] [2-3] [2-3] [1-2] [1-2] [2-3] [2-3]
III. HARDWARE SETUP
Motherboard Settings
III.H/WSETUP

18 ASUS P2-99B User’s Manual
SPD Support
This motherboard supports SPD DIMMs, and it is recommended that SPD DIMMs
be used.
General DIMM Notes
•Forthe systemCPU bus to operate above 100MHz, use only PC100-compli-
ant DIMMs. When this motherboard operates at 100MHz, most system will not
even boot if non-compliant modules are used because of the strict timing issues
involved under this speed. If your DIMMs are not PC100-compliant, set the
CPU external frequency to 66MHz for system stability.
• ASUS motherboards support SPD (Serial Presence Detect) DIMMs. This is the
memory of choice for best performance vs. stability.
• SDRAM chips are generally thinner with higher pin density than EDO (Ex-
tended Data Output) chips.
• BIOS shows SDRAM memory on bootup screen.
2. 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 Ac-
cess Memory (SDRAM).
The Intel 440ZX AGPset does not support ECC. However, ECC memory modules
may still be used, but the ECC function will not be available.
Memoryspeed setup is recommended through SDRAM Configuration under “Chipset
Features Setup” in BIOS SETUP.
Install memory in the following combinations:
Location 168-pin DIMM SDRAM Total Memory
DIMM1 Single-sided x1
(Rows 0&1) Double-sided
DIMM2 Single-sided x1
(Rows 2&3) Double-sided (Socket 3 must be empty)
DIMM3 Single-sided (Socket 2 must be single-sided) x1
(Row 3) (Double-sided cannot be used here!)
Total System Memory (Max 512MB) =
IMPORTANT!Atotal of four rows of memory is supported on this motherboard.
One side (with memory chips) of the DIMM takes up one row. Because Socket 3
shares Row 3 with Socket 2, Socket 3 can only be used if Socket 2 does not use
Row 3.
WARNING! If Row 3 is used by both Socket 2 and 3, your system will not boot up!
III. HARDWARE SETUP
System Memory
III.H/WSETUP

ASUS P2-99B User’s Manual 19
III.H/WSETUP
System Memory
III. HARDWARE SETUP
DIMM Memory Installation Procedures:
Insert the module(s) as shown. Because the number of pins are different on either
side of the breaks, the module will only fit in the orientation as shown. DRAM
SIMM modules have the same pin contacts on both sides. SDRAM DIMMs have
different pin contacts on each side and therefore have a higher pin density.
P2-99B 168-Pin DIMM Memory Sockets
20 Pins 60 Pins 88 Pins
Lock
R
P2-99B
The DIMMs must be 3.3Volt unbuffered SDRAMs. To determine the DIMM type,
check the notches on the DIMMs (see figure below).
168-Pin DIMM Notch Key Definitions (3.3V)
DRAM Key Position Voltage Key Position
Unbuffered
RFU
Buffered Reserved
3.3V
5.0V
The notches on the DIMM will shift between left, center, or right to identify the type
and also to prevent the wrong type from being inserted into the DIMM slot on the
motherboard. You must tell your retailer the correct DIMM type before purchasing.
This motherboard supports four clock signals per DIMM.

20 ASUS P2-99B User’s Manual
System Memory
III.H/WSETUP
III. HARDWARE SETUP
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