Asus P2L97-DS User manual

R
P2L97-DS
Dual Pentium®II Motherboard
USER’S MANUAL

ASUS P2L97-DS User’s Manual
2
USER'S NOTICE
Product Name: ASUS P2L97-DS
Manual Revision: 1.04. E237
Release Date: May 1998
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 pur-
poses, 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 BUTNOTLIMITEDTO 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 IFASUS HAS BEEN ADVISED OF THE POSSIBILITY
OF SUCH DAMAGESARISING 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 by ASUS; 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.
• Adaptec, AHA, EZ-SCSI, and AIC are registered trademarks of Adaptec, Inc.
• Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.
• IBM and OS/2 are registered trademarks of International Business Machines.
• Intel, LANDesk, and Pentium are registered trademarks of Intel Corporation.
• Symbios is a registered trademark of Symbios Logic Corporation.
• Trend and ChipAway Virus are trademarks of TrendMicro, Inc.
• Windows and MS-DOS are registered trademarks of Microsoft Corporation.
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 MANUALARE 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 ORINACCURACIESTHAT MAYAPPEARINTHIS MANUAL, INCLUD-
ING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Copyright © 1998 ASUSTeK COMPUTER INC.All Rights Reserved.

ASUS P2L97-DS User’s Manual 3
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC.
Marketing
Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support
Fax: [phone]
BBS: [phone]
Email: [email protected]
WWW: www.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER INTERNATIONAL
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
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 P2L97-DS User’s Manual
4
CONTENTS
I. INTRODUCTION 7
How this Manual is Organized ........................................................... 7
Item Checklist ..................................................................................... 7
II. FEATURES 8
Features of the ASUS P2L97-DS Motherboard.................................. 8
Introduction to ASUS Smart Motherboards .................................. 9
The ASUS P2L97-DS Motherboard............................................ 11
III. INSTALLATION 12
Layout of the ASUS P2L97-DS Motherboard .................................. 12
Installation Steps............................................................................... 14
1. Jumpers ......................................................................................... 14
Jumper Settings ..................................................................... 15
2. System Memory (DIMM) ............................................................ 19
DIMM Memory Installation Procedures: .............................. 20
3. Central Processing Unit (CPU).................................................... 21
Pentium II Processor.............................................................. 21
Recommended Heatsinks ............................................................ 25
AAVID Heatsink ................................................................... 25
Elan Vital Heatsink ................................................................ 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 ..................................................... 27
5. External Connectors..................................................................... 28
Power Connection Procedures .................................................... 37
IV. BIOS SOFTWARE 38
Main Menu ............................................................................ 38
Support Software .............................................................................. 38
Flash Memory Writer Utility....................................................... 38
Advanced Features Menu ...................................................... 39
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
BIOS Features Setup ................................................................... 45
Details of BIOS Features Setup............................................. 45

ASUS P2L97-DS User’s Manual 5
CONTENTS
\
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 ....................................................................... 59
Exit Without Saving .................................................................... 59
V. DESKTOP MANAGEMENT 60
Desktop Management Interface (DMI)............................................. 60
Introducing the ASUS DMI Configuration Utility ................ 60
System Requirements ............................................................ 60
Using the ASUS DMI Configuration Utility ......................... 61
VI.ADAPTEC SCSI SELECT (OPTIONAL) 63
Configuring the SCSI Adapter .......................................................... 63
Configure/View Host Adapter Settings ................................. 63
SCSI Disk Utilities ...................................................................... 63
VII. ADAPTEC EZ-SCSI UTILITY (OPTIONAL) 65
Quick Start Instructions .................................................................... 65
Windows95 or WindowsNT........................................................ 65
Windows/Windows for Workgroups 3.1x ................................... 65
DOS............................................................................................. 65
Troubleshooting Tips ........................................................................ 66
SCSI Device Troubleshooting..................................................... 66
Windows95/WindowsNT Troubleshooting................................. 66
Information for DOS/Windows 3.1x Users ...................................... 69
DOS and Windows3.1x Device Drivers...................................... 69
DOS and Windows3.1x ASPI Managers..................................... 69
DOS Formatting Utilities ............................................................ 70
Low-level Formatter (scsifmt)............................................... 70
Formatter and Partitioner (afdisk) ......................................... 71

ASUS P2L97-DS 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 CommunicationsStatement
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 P2L97-DS 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. Installation Instructions on setting up the motherboard
IV. BIOS Software Instructions on setting up the BIOS software
V. DMI Utility BIOS supported Desktop Management Interface
VI. Adaptec SCSI Select Adaptec SCSI Select utility (optional)
VII. Adaptec EZ-SCSI Adaptec EZ-SCSI utility (optional)
VIII. Adaptec 7800 Adaptec SCSI driver installation and usage (optional)
Item Checklist
Please check that your package is complete. If you discover damaged or missing
items, please contact your retailer.
(1) ASUS motherboard
(2) Retention mechanisms
(4) Attach mount bridges
(1) IDE ribbon cable for master and slave drives
(1) Floppy ribbon cable for (1) 5.25inch floppy and (2) 3.5inch floppies
(1) bag of spare jumpers
(1) disk or CD with support drivers and utilities:
• Flash Memory Writer utility to update the onboard programmable BIOS
• Desktop Management Interface (DMI) utility
• Bus Master IDE Drivers for various operating systems
• PC-Cillin 97 (version 3.0) for Windows95
• LANDeskClient Manager (LDCM) Software (with optional onboard LM78)
• Adaptec SCSI drivers and utilities (optional)
• Readme files for descriptions and use of the files
• Technical Support Form
(1) ASUS C-P2T CPU termination card
(1) User’s Manual
Infrared module (optional)
68-Pin Fast & Wide SCSI cable (optional)
50-Pin Fast SCSI cable (optional)

PB ASUS P2L97-DS User’s Manual
Features of the ASUS P2L97-DS Motherboard
TheASUS P2L97-DS is carefully designed for the discriminating PC user who wants
smart features processed by the fastest CPU. This motherboard:
•Dual Processor Support: Dual Intel Pentium
®
II (233MHz–333MHz) processors.
•Intel Chipset: Features Intel’s 440LX AGPset with I/O subsystems.
•Adaptec SCSI Chipset: Supports an optionalAdaptec’s 7880 Ultra-Fast/Wide
SCSI chipset.
•EnhancedACPI andAnti-Boot Virus BIOS: Features a programmable BIOS,
offering enhancedACPI for Windows 98 compatibility, built-in hardware-based
virus protection throgh Trend ChipAway Virus, and autodetection of most de-
vices for virtually automatic setup.
•AGP: SupportsAccelerated Graphics Port cards for high performance, compo-
nent level interconnect targeted at 3D graphical display applications.
•Wake-on-LAN: Supports Wake-on-LAN activity with special network cards,
such as the ASUS PCI-L101 10/100 Fast Ethernet PCI card.
•ISA & PCI Expansion Slots: Provides two 16-bit ISA and four 32-bit PCI slots.
•Super Multi-I/O: Provides two high-speed UART compatible serial ports and
oneparallel port with EPPand ECPcapabilities.UART2 can also be directed from
COM2 to the Infrared Module for wireless connections.
• 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.) (See section V)
•Ultra DMA/33 BM IDE: Comes with an onboard PCI Bus Master IDE control-
ler with two connectors that supports four IDE devices in two channels, supports
Ultra DMA/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 drives. Two
floppy drives of either 5.25inch or 3.5inch (1.44MB or 2.88MB) are also sup-
ported without an external card. Supports Japanese standard “Floppy 3 mode”
(3.5-inch disk drive: 1.2MB) and LS-120 floppy disk drives (3.5-inch disk drive:
120 MB, 1.44MB, 720K). BIOS supports IDE CD-ROM or SCSI device boot-up.
•Multi-Cache: Supports a Pentium® II processor with either 0, 256, or 512KB
Pipelined Burst Level 2 cache in the Single Edge Contact (SEC) cartridge.
•Versatile Memory Support: Equipped with four DIMM sockets to support [8,
16, 32, 64, 128, or 256 (EDO only) MB] 168-pin SDRAM/EDO memory mod-
ules up to 1 GB.
•IrDA: Supports an optional infrared port module for wireless interface.
II. FEATURES
Specifications
II. FEATURES

ASUS P2L97-DS User’s Manual 9
II. FEATURES
II. FEATURES
Smart Motherboard
Introduction to ASUS Smart Motherboards
Performance
• SDRAM Optimized Performance: The ASUS Smart Motherboards support
the new generation memory—Synchronous Dynamic RandomAccess Memory
(SDRAM)—which increases the data transfer rate from 264MB/s max using
EDO memory to 528MB/s max.
• Double the IDE Transfer Speed: The ASUS Smart Motherboards with Intel
PIIX4 PCIset improves IDE transfer rate using Bus Master UltraDMA/33 IDE,
which can handle data transfers up to 33MB/s. This new technology is compat-
ible with existing ATA-2 IDE specifications so there is no need to upgrade cur-
rent hard disk drives or cables.
•Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI mas-
ter busses to memory to CPU.
• ACPIReady:ACPI (Advanced Configuration and Power Interface)isalsoimple-
mented on all ASUS Smart Motherboards. ACPI provides more Energy Saving
Features for future operating systems (OS) supporting OS Direct Power Man-
agement (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 ofACPI, an ACPI-supported OS, such as the successor
to Windows 95, must be used.
• PC ’97 Compliant: Both the BIOS and hardware levels ofASUS Smart Moth-
erboards meet PC ’97 compliancy. The new PC ’97 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
both Windows 95 and Windows NT.
Intelligence (with optional LM78 Hardware Monitor only):
• Fan Status Monitoring and Alarm: To prevent system overheat and system
damage, the CPU fan and system fans are monitored for RPM and failure. Each
fan can be set for its normal RPM range and alarm thresholds.
•Voltage Monitoring and Alert: System voltage levels are monitored to ensure
stable current to critical motherboard components. Voltage specifications are
more critical for future processors, so monitoring is necessary to ensure proper
system configuration and management.

PB ASUS P2L97-DS User’s Manual
II. FEATURES
Smart Motherboard
II. FEATURES
• SystemResourcesAlert:Today’s operating systems, such as Windows 95,Win-
dows NT, and OS/2, require much more memory and hard drive space to present
enormous user interfaces and run large applications. The system resource moni-
tor will warn the user before the system resources are used up to prevent pos-
sible application crashes. Suggestions will give the user information on manag-
ing their limited resources more efficiently.
• 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 a important feature to implement silent PC systems.
• Dual Function Power Button (requiresATX power supply):The system can
be in one of two states, one is Sleep mode and the other is the Soft-Off mode.
Pushing the power button for less than 4 seconds places the system into Sleep
mode. When the power button is pressed for more than 4 seconds, it enters the
Soft-Off mode.
• Remote Ring On (requiresATX power supply):This allows a computer to be
turned on remotely through a modem. With this benefit on-hand, any user can
access vital information from their computer from anywhere in the world!
• Message LED (requires ACPI OS support): Chassis LEDs now act as infor-
mation providers. Through the way a particular LED illuminates, the user can
determine the stage the computer is in.A simple glimpse provides useful infor-
mation to the user.

ASUS P2L97-DS User’s Manual 11
II. FEATURES
II. FEATURES
Motherboard Parts
The ASUS P2L97-DS Motherboard
USB Port 1 (Top)
USB Port 2 (Bottom)
COM 2
(Bottom)
Programmable
2Mbit Flash ROM
4 PCI Slots
Accelerated
Graphics Port
2ISA Slots
PS/2 Mouse (Top)
PS/2 K’board (Bottom)
Parallel (Top)
DIMM SocketsIntel 440LXAGPset
Hardware
Monitor (optional)
Multi-I/O
Chip
Floppy Disk Drive
Connector
SEC CPU Slots
COM 1
(Bottom)
Narrow/Wide SCSI
Connectors (optional)
Adaptec’s 7880
Fast/Wide SCSI
Chipset (optional)
Intel PIIX4 PCIset
Primary/Secondary
IDE Connectors

PB ASUS P2L97-DS User’s Manual
III. INSTALLATION
Layout of the ASUS P2L97-DS Motherboard
Floppy Disk Drives
Secondary IDE Primary IDE
CPU_FAN
DIMM Socket 3 (64 bit, 168 pin module)
DIMM Socket 2 (64 bit, 168 pin module) DIMM Socket 1 (64 bit, 168 pin module)
Accelerated Graphics Port
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
ISA Slot 1
Intel
440LX
AGPset
2Mbit Flash EEPROM
(Programable BIOS)
PWR_FAN
Hardware
Monitor
Single Edge Contact Slot for CPU 1
Panel Connector
Multi-I/O
Chip
R
IrDA
IDELED
ATX Power Connector
Adaptec
7880 SCSI
Chipset
Intel PIIX4
PCIset
Wake on LAN
ISA Slot 2
CMOS Power
(CR2032 3V
Lithium Cell)
DIMM Socket 0 (64 bit, 168 pin module)
Narrow SCSI Connector
Wide SCSI Connector
1
35 34
68
USB
PS/2
COM 2
COM 1
PARALLEL PORT
Single Edge Contact Slot for CPU 2
BUS FREQ
FS0
FS1
FS2
CLRTC
USB 1 (TOP PORT)
USB 2 (BOTTOM)
MOUSE (TOP PORT)
KEYBOARD (BOTTOM)
CHA_FAN
CF4
CF3
CF2
CF1
SMB
FUSE1
PMP
CORE
FREQ
PAL16V8
SRSTART
PAL16V8
COUNTER
FUSE2
FUSE3
B
CHASSIS
NOTE: Greyed parts are optional.
LM78
Board Layout
III. INSTALLATION

ASUS P2L97-DS User’s Manual 13
III. INSTALLATION
Jumpers
1) FS0, FS1, FS2 p. 15 CPU Bus Frequency
2) CF1, CF2, CF3, CF4 p. 15 CPU Core:Bus Frequency Multiple
3) CLRTC p. 16 Clear Real Time Clock (RTC) RAM
Expansion Slots/Sockets
1) System Memory p. 19 System Memory Support
2) DIMM Sockets p. 20 DIMM Memory Module Support
3) SEC CPU Slot p. 21 Single Edge Contact CPU Support
4) SLOT1, SLOT2 p. 26 16-bit ISA Bus Expansion Slots
*
5) PCI1, PCI2, PCI3, PCI4 p. 27 32-bit PCI Bus Expansion Slots
†
6) AGP p. 27 Accelerated Graphics Port
Connectors
1) PS2KBMS p. 28 PS/2 Keyboard Connector (6-pin female)
2) PS2KBMS p. 28 PS/2 Mouse Connector (6-pin female)
3) PRINTER p. 29 Parallel (Printer) Port Connector (25-pin female)
4) COM1, COM2 p. 29 Serial Port COM1 & COM2 (two 9-pin male)
5) FLOPPY p. 29 Floppy Drive Connector (34-1 pin block)
6) USB p. 30 Universal Serial BUS Ports 1 & 2 (two 4-pin female)
7) PRIMARY/SECOND. IDE p. 30 Primary / Secondary IDE Connector (40-pin blocks)
8) IDELED p. 31 IDE LED Activity Light (2 pins)
9) CHA_, CPU_, PWR_FAN p. 31 Chassis,CPU,PowerSupplyFanConnectors(3-pinblock)
10) IR p. 32 Infrared Port Module Connector (5 pins)
11) ATXPWR p. 32 ATX Motherboard Power Connector (20-pin block)
12) WOL_CON p. 33 Wake on LAN (3 pins)
13) NARROW/WIDE SCSI
§
p. 33 Fast/NarrowSCSI(50pins)&Fast/WideSCSI(68pins)
14) TB LED (PANEL) p. 34 LED Lead (2 pins)
15) SMI (PANEL) p. 34 SMI Switch Switch Lead (2 pins)
16) PWR (PANEL) p. 34 ATX Power Switch / Soft Power Switch (2 pins)
17) RESET (PANEL) p. 34 Reset Switch Lead (2 pins)
18)
KEYLOCK ( PANEL ) p. 34 System Power LED (3 pins)
19)
KEYLOCK ( PANEL ) p. 34 Keyboard Lock Switch Lead (2 pins)
20) SPEAKER (PANEL) p. 34 Speaker Connector (4 pins)
21) CHASSIS p. 35 Chassis Open Alarm Lead (3-pin block)
*
The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not
use this address otherwise conflicts will occur.
†
PCI slot 4 share the same interrupt number (INT#) as the optional onboard SCSI so PCI slot 4
card must be able to share an INT# or make sure that it does not use an INT# at all.
§
Optional
Board Layout
III. INSTALLATION

PB ASUS P2L97-DS User’s Manual
III. INSTALLATION
Jumpers
III. INSTALLATION
Installation Steps
Before using your computer, you must complete the following steps:
1. Set Jumpers
2. Install DRAM Modules
3. Install the Central Processing Unit (CPU)
4. Install Expansion Cards
5. Connect Ribbon Cables, Cabinet Wires, and Power Supply
6. Setup the BIOS Software
1. Jumpers
Several hardware settings are made through the use of jumper caps to connect jumper
pins (JP) on the motherboard. See motherboard layout on page 10 for locations of
jumpers. The jumper settings will be described numerically such as [----], [1-2],
[2-3] for no connection, connect pins 1&2, and connect pins 2&3 respectively. Pin 1
for our motherboards is always on top
PIN 1
or on the left when holding the
motherboard with the keyboard connector away from yourself. A “1” is written
besides pin 1 on jumpers with three pins. The jumpers will also be shown graphi-
cally such as to connect pins 1&2 and to connect pins 2&3. Jumpers
with two pins will be shown as for Short (On) and for Open (Off). For
manufacturing simplicity, the jumpers may be sharing pins from other groups. Use
the diagrams in this manual instead of following the pin layout on the board. Settings
with two jumper numbers require that both jumpers be moved together. To connect
the pins, simply place a plastic jumper cap over the two pins as diagramed.
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.

ASUS P2L97-DS User’s Manual 15
III. INSTALLATION
III. INSTALLATION
Jumpers
Jumper Settings
CPU Bus Frequency
R
CPU Core:Bus Frequency Multiple
FS1 FS0 FS2
1
2
3
FS1 FS0 FS2
1
2
3
FS1 FS0 FS2
1
2
3
FS1 FS0 FS2
1
2
3
FS1 FS0 FS2
1
2
3
FS1 FS0 FS2
1
2
3
FS1 FS0 FS2
1
2
3
FS1 FS0 FS2
50MHz 55MHz 60MHz 66MHz 68MHz 75MHz 83MHz 100MHz
5.0x(5/1)4.5x(9/2)4.0x(4/1)3.5x(7/2) 5.5x(11/2)
CF2 CF3 CF1
CF4
CF2 CF3 CF1
CF4
CF2 CF3 CF1
CF4
CF2 CF3 CF1
CF4
CF2 CF3 CF1
CF4
1. CPU Bus Frequency (FS0, FS1, FS2)
This option tells the clock generator what frequency to send to the CPU.This allows the
selection of the CPU’s External frequency (or BUS Clock). The BUS Clock multiplied
by the BUS Ratio equals the CPU’s Internal frequency (the advertised CPU speed).
2. CPU Core:BUS Frequency Multiple (CF1, CF2, CF3, CF4)
This option sets the frequency ratio between the Internal frequency of the CPU
and the CPU’s External frequency. These must be set in conjunction with the
CPU Bus Frequency.
Intel Pentium II Processor in a SEC Cartridge
(233-400MHz 512KB/128KB/0KB L2 Cache)
WARNING!Frequencies above 66Mhz exceed the specifications for the onboard
Intel Chipset and are not guaranteed to be stable.
Set the jumpers by the Internal speed of your processor as follows:
(BUS Freq.) (Freq. Ratio)
CPU Model Freq. Ratio BUS F. FS0 FS1 FS2 CF1 CF2 CF3 CF4
Intel Pentium II 300MHz 4.5x 66MHz [1-2] [1-2] [1-2] [OFF] [ON] [OFF] [ON]
Intel Pentium II 266MHz 4.0x 66MHz [1-2] [1-2] [1-2] [ON] [ON] [OFF] [ON]
Intel Pentium II 233MHz 3.5x 66MHz [1-2] [1-2] [1-2] [OFF] [OFF] [ON] [ON]
NOTES:Overclocking your processor is not recommended. It may result in a slower
speed. Voltage Regulator Output Selection (VID) is not needed for the Pentium II
processor because it sends a VID signal directly to the onboard power controller.

PB ASUS P2L97-DS User’s Manual
III. INSTALLATION
Jumpers
III. INSTALLATION
5. Real Time Clock (RTC) RAM (CLRTC)
The CMOS RAM is powered by the onboard button cell battery. To clear the
RTC data: (1) Turn off your computer and unplug its AC power, (2) Short the
two solder points labeled CLRTC, (3) Turn on your computer, (4) Hold down
<Delete> during bootup and enter BIOS setup to re-enter user preferences.

ASUS P2L97-DS User’s Manual 17
III. INSTALLATION
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PB ASUS P2L97-DS User’s Manual
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ASUS P2L97-DS User’s Manual 19
Install memory in any combination as follows:
DIMM Location 168-pin DIMM Memory Modules Total Memory
Socket 0 (Rows 0&1) SDRAM/EDO 8, 16, 32, 64, 128, 256MB x1
Socket 1 (Rows 2&3) SDRAM/EDO 8, 16, 32, 64, 128, 256MB x1
Socket 2 (Rows 4&5) SDRAM/EDO 8, 16, 32, 64, 128, 256MB x1
Socket 3 (Rows 6&7) SDRAM/EDO 8, 16, 32, 64, 128, 256MB x1
Total System Memory (Max 1GB) =
2. System Memory (DIMM)
This motherboard uses only Dual Inline Memory Modules (DIMMs). Four sockets
are available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random
Access Memory (SDRAM) of either 8, 16, 32, 64, or 128MB to form a memory size
between 8MB to 512MB or Extended Data Output (EDO) DRAM of either 8, 16,
32, 64, 128, or 256MB to form a memory size between 8MB to 1GB. One side (with
memory chips) of the DIMM takes up one row on the motherboard.
To utilize the chipset’s Error Checking and Correction (ECC) feature, you must use a
DIMM module with 9 chips per side (standard 8 chips/side + 1 ECC chip) and make
the proper settings through “Chipset Features Setup” in IV. BIOS SOFTWARE.
Memory speed setup is recommended through EDO Auto Configuration under
“Chipset Features Setup”.
General DIMM Notes (not true for all memory modules)
• Four possible memory chips are supported: EDO or SDRAM with and without ECC.
• SDRAM chips are generally thinner with higher pin density than EDO chips.
• BIOS shows EDO or SDRAM memory on bootup screen.
• 8 chip/side modules do not support ECC, only 9 chip/side modules support ECC.
• Single sided modules are usually 16, 32, 64 or 128 MB, double sided are usually 8, 32, 64,
128 or 256MB.
III. INSTALLATION
III. INSTALLATION
System Memory
Non-ECC SDRAM DIMM (8 chips)
ASUS Memory Modules
ECC EDO DIMM (9 chips)

PB ASUS P2L97-DS User’s Manual
System Memory
III. INSTALLATION
III. INSTALLATION
DIMM Memory Installation
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. DIMM
modules are longer and have different pin contact on each side and therefore have a
higher pin density. SDRAM DIMM modules have a different pin contact on each
side and therefore have a higher pin density.
Lock
168-Pin DIMM Memory Sockets
88 Pins
60 Pins
20 Pins
(FRONT)
R
TheDIMMsmustbe 3.3VUnbufferedforthismotherboard.To determinetheDIMM
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 module will shift between left, center, or right to identify
the typeand also to preventthe wrong type from beinginserted into theDIMM slot on
the motherboard.You must tell your retailer the correct DIMM type before purchas-
ing. This motherboard supports four clock signals.