ASUS P2L97DS User Manual

R

P2L97-DS

Dual Pentium® II Motherboard

USER’S MANUAL

USER'S NOTICE

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

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

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

Copyright © 1998 ASUSTeK COMPUTER INC. All Rights Reserved.

Product Name: ASUS P2L97-DS
Manual Revision: 1.04. E237
Release Date: May 1998

2

ASUS P2L97-DS User’s Manual

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC.

Marketing

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

Technical Support

Fax: [phone]
BBS: [phone]
Email: [e-mail]
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: [e-mail]

Technical Support

Fax: [phone]
BBS: [phone]
Email: [e-mail]
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: [e-mail]

Technical Support

Hotline: [phone]
BBS: 49-2102-448690
Email: [e-mail]
WWW: www.asuscom.de
FTP: ftp.asuscom.de/pub/ASUSCOM

ASUS P2L97-DS User’s Manual 3

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 V ital 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

4

ASUS P2L97-DS User’s Manual

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 5

FCC & DOC COMPLIANCE

Federal Communications Commission Statement

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

• This device may not cause harmful interference, and

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

This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installa­tion. This equipment generates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with manufacturer's instructions, may cause
harmful interference to radio communications. However , there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the inter­ference by one or more of the following measures:

• 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.

Canadian Department of Communications Statement

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

6

ASUS P2L97-DS User’s Manual

I. INTRODUCTION

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.

Manual / Checklist

I. INTRODUCTION

(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

• LANDesk Client 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)

ASUS P2L97-DS User’s Manual 7

Features of the ASUS P2L97-DS Motherboard

The ASUS 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

• Intel Chipset: Features Intel’s 440LX AGPset with I/O subsystems.

• Adaptec SCSI Chipset: Supports an optional Adaptec’ s 7880 Ultra-Fast/W ide

II. FEATURES

Specifications

• Enhanced ACPI and Anti-Boot V irus BIOS: Features a programmable BIOS,

• AGP: Supports Accelerated Graphics Port cards for high performance, compo-

• Wake-on-LAN: Supports Wake-on-LAN activity with special network cards,

II. FEATURES

®

II (233MHz–333MHz) processors.

SCSI chipset.

offering enhanced ACPI for W indows 98 compatibility , built-in hardware-based
virus protection throgh Trend ChipAway Virus, and autodetection of most de­vices for virtually automatic setup.

nent level interconnect targeted at 3D graphical display applications.

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

one parallel port with EPP and ECP capabilities. UAR T2 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 T ape Backup and CD-ROM drives. Two
floppy drives of either 5.25inch or 3.5inch (1.44MB or 2.88MB) are also sup­ported 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 mod­ules up to 1 GB.

• IrDA: Supports an optional infrared port module for wireless interface.

PB ASUS P2L97-DS User’s Manual

II. FEATURES

Introduction to ASUS Smart Motherboards

Performance

• SDRAM Optimized Performance: The ASUS Smart Motherboards support

the new generation memory—Synchronous Dynamic Random Access 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 compat­ible with existing ATA-2 IDE specifications so there is no need to upgrade cur­rent hard disk drives or cables.

• Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI mas-

ter busses to memory to CPU.

• ACPI Ready: ACPI (Advanced Configuration and Power Interface) is also imple-

mented on all ASUS Smart Motherboards. ACPI provides more Energy Saving
Features for future operating systems (OS) supporting OS Direct Power Man­agement (OSPM) functionality . W ith 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 the successor
to Windows 95, must be used.

II. FEATURES

Smart Motherboard

• PC ’97 Compliant: Both the BIOS and hardware levels of ASUS 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.

ASUS P2L97-DS User’s Manual 9

• System Resources Alert: T oday’ s operating systems, such as W indows 95, W in-

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 moni­tor will warn the user before the system resources are used up to prevent pos­sible application crashes. Suggestions will give the user information on manag­ing their limited resources more efficiently.

• Auto Fan Off: The system fans will power off automatically even in sleep

Smart Motherboard

II. FEATURES

mode. This function reduces both energy consumption and system noise, and
is a important feature to implement silent PC systems.

• Dual Function Power Button (requires ATX 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 (requires A TX 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!

II. FEATURES

• 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 infor­mation to the user.

PB ASUS P2L97-DS User’s Manual

II. FEATURES

The ASUS P2L97-DS Motherboard

PS/2 Mouse (Top)
PS/2 K’board (Bottom)

USB Port 1 (Top)
USB Port 2 (Bottom)

COM 1
(Bottom)

Parallel (Top)

COM 2
(Bottom)

Primary/Secondary
IDE Connectors

Narrow/Wide SCSI
Connectors (optional)

Adaptec’s 7880
Fast/Wide SCSI
Chipset (optional)

Accelerated
Graphics Port

SEC CPU Slots

DIMM SocketsIntel 440LX AGPset

II. FEATURES

Motherboard Parts

4 PCI Slots

Multi-I/O
Chip

Hardware
Monitor (optional)

2 ISA Slots

Intel PIIX4 PCIset

Programmable
2Mbit Flash ROM

Floppy Disk Drive
Connector

ASUS P2L97-DS User’s Manual 11

III. INSTALLATION

Layout of the ASUS P2L97-DS Motherboard

III. INSTALLATION

Board Layout

PS/2

MOUSE (TOP PORT)
KEYBOARD (BOTTOM)

USB

USB 1

(TOP PORT)

USB 2 (BOTTOM)

COM 1

PARALLEL PORT

COM 2

Multi-I/O
Chip

Hardware

Monitor

LM78

FUSE1

CPU_FAN

FUSE2

ATX Power Connector

PMP

Adaptec

7880 SCSI

Wake on LAN

Chipset

Single Edge Contact Slot for CPU 1

Narrow SCSI Connector

35

1

FUSE3

68
34

Accelerated Graphics Port

PCI Slot 1

PCI Slot 2

PCI Slot 3

PAL16V8
SRSTART

PCI Slot 4

PWR_FAN

Intel

440LX

AGPset

Single Edge Contact Slot for CPU 2

Wide SCSI Connector

FS0
FS1
FS2

BUS FREQ

R

SMB

Intel PIIX4

PCIset

Secondary IDE

Primary IDE

DIMM Socket 3 (64 bit, 168 pin module)

DIMM Socket 2 (64 bit, 168 pin module)

DIMM Socket 1 (64 bit, 168 pin module)

DIMM Socket 0 (64 bit, 168 pin module)

Floppy Disk Drives

CMOS Power

(CR2032 3V
Lithium Cell)

B

CLRTC

Panel Connector

IrDA

ISA Slot 1

2Mbit Flash EEPROM

(Programable BIOS)

ISA Slot 2

NOTE: Greyed parts are optional.

PB ASUS P2L97-DS User’s Manual

PAL16V8
COUNTER

CHA_FAN

CF4

CORE

CF3
CF2

FREQ

CF1

CHASSIS

IDELED

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, Power Supply Fan Connectors (3-pin block)

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/Narrow SCSI (50 pins) & Fast/Wide SCSI (68 pins)

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 (

19)

KEYLOCK (

PANEL
PANEL

)
)

p. 34 System Power LED (3 pins)
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)

Board Layout

III. INSTALLATION

*

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

ASUS P2L97-DS User’s Manual 13

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

III. INSTALLATION

Jumpers

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
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 graphi­cally 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 electric­ity, you should follow some precautions whenever you work on your computer.

PIN 1

or on the left when holding the

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.

PB ASUS P2L97-DS User’s Manual

III. INSTALLATION

Jumper Settings

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.

FS1

FS2

FS1

FS0

FS2

FS1

FS0

FS2

FS1

FS0

FS2

FS1

FS0

FS2

FS1

FS0

FS1

FS0

1
2
3

FS2

1

1
2
3

2

2

3

3

1

1

1

2

2

3

3

FS1

FS0

FS2

FS2

1
2
3

50MHz 55MHz 60MHz 66MHz 68MHz 75MHz 83MHz 100MHz

CPU Bus Frequency

FS0

R

CF1

CF2

CF3

CF4

CF1

CF2

CF3

CF4

CF1

CF2

CF3

CF4

5.0x(5/1)4.5x(9/2)4.0x(4/1)3.5x(7/2)

CF1

CF2

CF3

CF4

CF2

CF3

CF1

5.5x(11/2)

CF4

CPU Core:Bus Frequency Multiple

WARNING! Frequencies above 66Mhz exceed the specifications for the onboard

Intel Chipset and are not guaranteed to be stable.

Intel Pentium II Processor in a SEC Cartridge
(233-400MHz 512KB/128KB/0KB L2 Cache)

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]

Jumpers

III. INSTALLATION

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.

ASUS P2L97-DS User’s Manual 15

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.

PB ASUS P2L97-DS User’s Manual

III. INSTALLATION

(This page was intentionally left blank.)

ASUS P2L97-DS User’s Manual 17

(This page was intentionally left blank.)

PB ASUS P2L97-DS User’s Manual

III. INSTALLATION

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”.

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) =

ASUS Memory Modules

ECC EDO DIMM (9 chips)

Non-ECC SDRAM DIMM (8 chips)

System Memory

III. INSTALLATION

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.

ASUS P2L97-DS User’s Manual 19

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.

III. INSTALLATION

System Memory

168-Pin DIMM Memory Sockets

The DIMMs must be 3.3V Unbuffered for this motherboard. T o determine the DIMM
type, check the notches on the DIMMs (see figure below).

168-Pin DIMM Notch Key Definitions (3.3V)

R

DRAM Key Position

20 Pins

Voltage Key Position

60 Pins

(FRONT)

88 Pins

Lock

RFU

Buffered

Unbuffered

5.0V

Reserved

3.3V

The notches on the DIMM module 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.

PB ASUS P2L97-DS User’s Manual

III. INSTALLATION

3. Central Processing Unit (CPU)

The ASUS P2L97-DS motherboard provides two Single Edge Contact (SEC) slots
for Pentium II processors packaged in SEC cartridges.

Pentium II Processor

You should check to see that you have two sets of the following items:

Lock Holes

Captive Nut

Attach Mount BridgesPentium II Retention Mechanism

The recommended heatsinks (see section on recommended heatsinks for more in­formation) for the Pentium II processor are those with three-pin fans that can be
connected to the fan connectors on the motherboard.

WARNING! Be sure that sufficient air circulation is available across the

processor’s 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 fan, if necessary.

Other Important Items

Intel Pentium II Processor in a SEC Cartridge
(233-333MHz 512KB/128KB/0KB L2 Cache)

CPU

III. INSTALLATION

ASUS C-P2T CPU Termination Card

ASUS P2L97-DS User’s Manual 21

III. INSTALLATION

III. INSTALLATION

The ASUS P2L97-DS As Shipped

The ASUS P2L97-DS is shipped with the attach mount bridges already installed.

SEC slots for the
Pentium II processor

NOTE: Encircled items are points where the
attach mount bridges are factory-installed

CPU

Installing the Pentium II Processor

1. Mount the Pentium II Retention Mechanism: The retention mechanism is

designed to fit into the SEC slot only one way.

TIP: Orient the mechanism’ s lock holes toward the motherboard’ s chipset (see moth­erboard layout for the location of the Intel 440LX AGPset).

Be sure to align the notch in the mechanism with the small rib on one side of the
slot and that the mechanism is properly seated on the board. Then, screw the
captive nuts in place.

WARNING! Do not overtighten the captive nuts. Doing so could damage your

motherboard. Tighten captive nuts to no more than 6±1 inch/pound.

Lock holes

Captive nut

22 ASUS P2L97-DS User’s Manual

Captive nut