Asus P2l97 User manual

R

P2L97

Pentium®II Motherboard

USER’S MANUAL

ASUS P2L97 User’s Manual

2

USER'S NOTICE

Product Name: ASUS P2L97

Manual Revision: 1.05

Release Date: September 1997

No part of this manual, including the products and softwares 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.

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.

• 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.

• Sound Blaster AWE32 and SB16 are trademarks of Creative Technology Ltd.

• Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.

The product name and revision number are both printed on the board itself. Manual revisions

are released for each board 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.

Forprevious or updated manuals, BIOS, drivers, orproduct 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-

MITMENTBYASUS.ASUSASSUMESNO RESPONSIBLITYORLIABILITYFORANY

ERRORS OR INACCURACIES THAT MAYAPPEAR IN THIS MANUAL, INCLUDING

THE PRODUCTS AND SOFTWARES DESCRIBED IN IT.

ASUS P2L97 User’s Manual 3

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC.

Marketing Info

Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112, ROC

Telephone: +886-2-894-3447

Fax: +886-2-894-3449

Email: [email protected]

Technical Support

Fax: +886-2-895-9254

BBS: +886-2-896-4667

Email: [email protected]

WWW: www.asus.com.tw

Gopher: gopher.asus.com.tw

FTP: ftp.asus.com.tw/pub/ASUS

ASUS COMPUTER INTERNATIONAL

Marketing Info

Address: 721 Charcot Avenue, San Jose, CA 95131, USA

Telephone: +1-408-474-0567

Fax: +1-408-474-0568

Email: [email protected]

Technical Support

BBS: +1-408-474-0569

Email: [email protected]

WWW: www.asus.com

ASUS COMPUTER GmbH

Marketing Info

Address: Harkort Str. 25, 40880 Ratingen, BRD, Germany

Telephone: 49-2102-445011

Fax: 49-2102-442066

Email: [email protected]

Technical Support

BBS: 49-2102-448690

Email: [email protected]

Hotline: 49-2102-499712

ASUS P2L97 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 Motherboard ........................................ 8

The ASUS P2L97 Motherboard .................................................... 9

III. INSTALLATION 10

Layout of the ASUS P2L97 Motherboard ........................................ 10

Installation Steps............................................................................... 12

1. Jumpers ......................................................................................... 12

Jumper Settings ........................................................................... 13

2. System Memory (DIMM) ............................................................ 17

DIMM Memory Installation Procedures: .............................. 18

3. Central Processing Unit (CPU).................................................... 19

Pentium II Processor.............................................................. 19

AAVID Heatsink ................................................................... 23

Elan Vital Heatsink ................................................................ 23

4. Expansion Cards ........................................................................... 24

Expansion Card Installation Procedure ................................. 24

Assigning IRQs for Expansion Cards.................................... 24

Assigning DMA Channels for ISA Cards.............................. 25

ISA Cards and Hardware Monitor ......................................... 25

5. External Connectors..................................................................... 26

Power Connection Procedures .................................................... 33

IV. BIOS SOFTWARE 34

Support Software......................................................................... 34

Flash Memory Writer Utility....................................................... 34

Main Menu ............................................................................ 35

Advanced Features Menu ...................................................... 35

Managing and Updating Your Motherboard’s BIOS................... 36

6. BIOS Setup .................................................................................. 37

Load Defaults ........................................................................ 38

ASUS P2L97 User’s Manual 5

CONTENTS

Standard CMOS Setup ................................................................ 38

Details of Standard CMOS Setup:......................................... 38

BIOS Features Setup ................................................................... 41

Details of BIOS Features Setup............................................. 41

Chipset Features Setup ................................................................ 44

Details of Chipset Features Setup.......................................... 44

Power Management Setup........................................................... 47

Details of Power Management Setup .................................... 47

PNP and PCI Setup ..................................................................... 50

Details of PNP and PCI Setup ............................................... 50

Load BIOS Defaults .................................................................... 52

Load Setup Defaults .................................................................... 52

Supervisor Password and User Password ................................... 53

IDE HDD Auto Detection ........................................................... 54

Save & Exit Setup ....................................................................... 55

Exit Without Saving .................................................................... 55

V. DESKTOP MANAGEMENT 56

Desktop Management Interface (DMI)............................................. 56

Introducing the ASUS DMI Configuration Utility ................ 56

System Requirements ............................................................ 56

Using the ASUS DMI Configuration Utility ......................... 57

VI. ASUS PCI SCSI Cards 59

Symbios SCSI BIOS and Drivers ..................................................... 59

ASUS PCI-SC200 & PCI-SC860 SCSI Cards ................................. 59

Setting Up the ASUS PCI-SC200 & PCI-SC860........................ 60

Setting the INTAssignment for the ASUS PCI-SC200 .............. 60

Terminator Requirements for SCSI Devices ............................... 60

Terminator Settings for the ASUS PCI-SC860 ........................... 61

Terminator Settings for the ASUS PCI-SC200 ........................... 61

SCSI ID Numbers for SCSI Devices .......................................... 62

SCSI ID Priority .......................................................................... 62

ASUS P2L97 User’s Manual

6

FCC & DOC COMPLIANCE

FederalCommunications 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 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.

CanadianDepartment of 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 User’s Manual 7

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. Support Software Information on the included support software

VI. ASUS SCSI Cards Installation ofASUS SCSI cards (optional)

Item Checklist

Check that your package is complete. If you discover damaged or missing items,

contact your retailer.

þASUS P2L97 motherboard

þRetention mechanism & heatsink support

þ1 IDE ribbon cable

þ1 floppy ribbon cable

þASUS P2L97 Support Drivers & Utilities

• Flash Memory Writer utility to update the FLASH BIOS

• Desktop Management Interface (DMI) utility

• LANDesk

®

Client Manager (LDCM) Software (with optional onboardLM78)

• Readme files for descriptions and use of the files

• Technical Support Form

þThis user’s manual

¨Infrared module (optional)

¨ASUS PCI-SC200 Fast-SCSI or PCI-SC860 Ultra-Fast SCSI card (optional)

I. INTRODUCTION

(Manual / Checklist)

8 ASUS P2L97 User’s Manual

Features of the ASUS P2L97 Motherboard

TheASUS P2L97 is carefully designed for the demanding PC user who wants many

features processed by the fastest CPU. This motherboard:

•Versatile Processor Support: Intel Pentium

®

II (233MHz–333MHz) processor.

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

•Easy Installation: Is equipped with BIOS that supports auto detection of hard

drives, PS/2 mouse, and Plug and Play devices to make setup of hard drives,

expansion cards, and other devices virtually automatic.

•ISA & PCI Expansion Slots: Provides one 16-bit ISA, four 32-bit PCI slots, and

one ISA/PCI shared slot.

•Super Multi-I/O: Provides two high-speed UART compatible serial ports and

oneparallelportwithEPPand ECPcapabilities. UART2canalsobedirectedfrom

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)

•PCI Bus Master IDE Controller: Comes with an onboard PCI Bus Master IDE

controller with two connectors that supports four IDE devices in two channels,

supports 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 supported with-

out 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.

•CPU Built-In Level 2 Cache: 512KB or 256KB Pipelined Burst Level 2 cache

in the Pentium II Single Edge Contact (SEC) cartridge.

•Versatile Memory Support: Is equipped with three DIMM sockets to support

(8,16,32,64,or 128MB) 168-pin SDRAM/EDO memory modules up to 384MB.

•SCSI BIOS: Supports optional ASUS SCSI controller cards through onboard

SYMBIOS firmware.

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

•Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI master

busses to memory to CPU.

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

nent level interconnect targeted at 3D graphical display applications.

•Intelligence: Supports Fan Status Monitoring and Alarm, Temperature Moni-

toring and Alert, Voltage Monitoring and Alert, System Resources Alert, and

Virus Write Protection through the optional onboard LM78 Hardware Monitor

and Intel

®

LANDesk Client Manager (LDCM) software.

II. FEATURES

(Specifications)

II. FEATURES

ASUS P2L97 User’s Manual 9

The ASUS P2L97 Motherboard

II. FEATURES

(Motherboard Parts)

T: USB Port 1

B: USB Port 2

B: COM 1

B: COM 2

Programmable

Flash ROM

4 PCI Slots

Accelerated

Graphics Port

1ISA Slot

1 ISA/PCI Share

T: PS/2 Mouse

B: PS/2 Keyboard

T: Parallel

B: Serial

3 DIMM SocketsIntel 440LXAGPset

10 ASUS P2L97 User’s Manual

III. INSTALLATION

Layout of the ASUS P2L97 Motherboard

Floppy Drives

Secondary IDE

Primary IDE

CR2032 3V

Lithium Cell

(BIOS Power)

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

PCI Slot 5

ISA Slot 1

ISA Slot 2

Intel PIIX4

PCIset

Intel

440LX

AGPset

Flash EEPROM

(Programable BIOS)

PWR_FAN

CHA_FAN

LM78

Hardware

Monitor

ATX Power Conenctor

Single Edge Contact CPU Slot

Panel Connectors

Infrared Connector

IDE LED

USB

PS/2

COM 1

Parallel Port

COM 2

T: USB 1

B: USB 2

T: Mouse

B: Keyboard

Multi-I/O

R

Wake on LAN

Connector

BUS FREQ

BF2

BF3

BF1

BF0

CLRTC

BUS FREQ

FS1

FS0

FS2

(Board Layout)

III. INSTALLATION

ASUS P2L97 User’s Manual 11

III. INSTALLATION

Jumpers

1) CLRTC p. 13 Real Time Clock (RTC) RAM (Short/Clear CMOS)

2) FS0, FS1, FS2 p. 14 CPU External Clock (BUS) Frequency Selection

3) BF0, BF1, BF2, BF3 p. 14 CPU”BUS Frequency Ratio

Expansion Slots/Sockets

1) System Memory p. 15 System Memory Support

2) DIMM Sockets p. 16 DIMM Memory Module Support

3) SEC CPU Slot p. 19 Single Edge Contact CPU Support

4) SLOT1, SLOT2 p. 24 16-bit ISA Bus Expansion Slots

*

5) PCI1, 2, 3, 4, 5 p. 24 32-bit PCI Bus Expansion Slots

†

6) AGP p. 25 Accelerated Graphics Port

Connectors

1) PS2KEYBOARD p. 26 PS/2 Keyboard Connector (6-pin female)

2) PS2MOUSE p. 26 PS/2 Mouse Connector (6-pin female)

3) PRINTER p. 27 Parallel (Printer) Port Connector (25-pin female)

4) COM1, COM2 p. 27 Serial Port COM1 & COM2 (two 9-pin male)

5) FLOPPY p. 27 Floppy Drive Connector (34-pin block)

6) USB p. 28 Universal Serial BUS Ports 1 & 2 (two 4-pin female)

7) Primary / Second IDE p. 28 Primary / Secondary IDE Connector (40-pin blocks)

8) IDELED p. 29 IDE LED Activity Light (2 pins)

9) CHA_, PWR_, CPU_FAN p. 29 Chassis, Power Supply, CPU Fan Power Lead (3-pin block)

10) IR p. 30 Infrared Port Module Connector (5 pins)

11) ATXPWR p. 30 ATX Motherboard Power Connector (20-pin block)

12) WOL p. 31 Wake on LAN Connector (3 pins) (Reserved)

13) MSG LED (PANEL) p. 32 System Message LED (2 pins)

14) SMI (PANEL) p. 32 SMI Switch Lead (2 pins)

15) PWR SW (PANEL) p. 32 ATX Power & Soft-Off Switch Lead (2 pins)

16) RESET (PANEL) p. 32 Reset Switch Lead (2 pins)

17)

PWR LED (

PANEL

)

p. 32 System Power LED Lead (3 pins)

18)

KEYLOCK (

PANEL

)

p. 32 Keyboard Lock Switch Lead (2 pins)

19) SPEAKER (PANEL) p. 32 Speaker Output Connector (4 pins)

*

The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not

use this address otherwise conflicts will occur.

†

PCI slots 4&5 share the same interrupt number (INT#) so PCI cards on these two slots must be

able to share an INT# or make sure that one of these PCI cards does not use an INT#.

(Board Layout)

III. INSTALLATION

12 ASUS P2L97 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

Pin 1

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 User’s Manual 13

III. INSTALLATION

(Jumpers)

Jumper Settings

1. 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 your AC power, (2) Short the

two points (Labeled: CLRTC), (3) Turn on your computer, (4) Hold down

<Delete> during bootup and enter BIOS setup to re-enter user preferences.

Short small solder points to clear

Clear RTC RAM

CLRTC

R

14 ASUS P2L97 User’s Manual

III. INSTALLATION

(Jumpers)

III. INSTALLATION

R

CPU Bus Frequency

60MHz 66MHz 75MHz 83MHz

FS1

FS0

FS2

1

2

3

FS1

FS0

FS2

1

2

3

FS1

FS0

FS2

1

2

3

FS1

FS0

FS2

1

2

3

CPU Core:Bus Frequency Multiple

4.5x(9/2)4.0x(4/1)3.5x(7/2)2.0x(2/1) 5.0x(5/1)

BF2

BF1

BF3

BF0

123

BF2

BF1

BF3

BF0

123

BF2

BF1

BF3

BF0

123

BF2

BF1

BF3

BF0

123

BF2

BF1

BF3

BF0

123

2. 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).

3. CPU Core:BUS Frequency Multiple (BF0, BF1, BF2, BF3)

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

(233-333MHz 256/512KB L2 Cache)

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

Intel Chipset and are not guaranteed to be stable.

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.

Set the jumpers by the Internal speed of your processor as follows:

(BUS Freq.) (Freq. Ratio)

CPU Model Freq. Ratio BUS F. FS2 FS1 FS0 BF3 BF2 BF1 BF0

Intel Pentium II 333MHz 5.0x 66MHz [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [2-3]

Intel Pentium II 300MHz 4.5x 66MHz [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2]

Intel Pentium II 266MHz 4.0x 66MHz [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3]

Intel Pentium II 233MHz 3.5x 66MHz [1-2] [1-2] [1-2] [2-3] [2-3] [1-2] [1-2]

ASUS P2L97 User’s Manual 15

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16 ASUS P2L97 User’s Manual

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ASUS P2L97 User’s Manual 17

III. INSTALLATION

(System Memory)

2. System Memory (DIMM)

Only Dual Inline Memory Modules (DIMM’s) can be used with this motherboard.

Twosocketsareavailable for 3.3Volt(power level) UnbufferedSynchronous DRAMs

(SDRAM) or EDO DRAM of either 8, 16, 32, 64, or 128MB to form a memory size

between 8MB to 384MB. One side (with memory chips) of the DIMM module

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 parity chip) and

make the proper settings in the BIOS Chipset Features Setup.

IMPORTANT: Memory speed setup is required through "Auto Configura-

tion" in BIOS Chipset Features Setup.

Install memory in any combination as follows:

DIMM Location 168-pin DIMM Memory Modules Total Memory

Socket 1 (Rows 0&1) SDRAM/EDO 8, 16, 32, 64, 128MB x1

Socket 2 (Rows 2&3) SDRAM/EDO 8, 16, 32, 64, 128MB x1

Socket 3 (Rows 4&5) SDRAM/EDO 8, 16, 32, 64, 128MB x1

Total System Memory (Max 384MB) =

General DIMM Notes: (not true for all memory modules)

• Four possible memory chips are supported: EDO or SDRAM with and without parity.

• 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 parity, only 9 chip/side modules support parity.

• Single sided modules are usually 16 or 64 MB, double sided are usually 8, 32, or 128MB.

ASUS Memory Examples:

III. INSTALLATION

Parity EDO DIMM (9 chips)

Non-Parity SDRAM DIMM (8 chips)

18 ASUS P2L97 User’s Manual

(System Memory)

III. INSTALLATION

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 contact on both sides. SDRAM DIMM modules

have different pint contact on each side and therefore have a higher pin density.

Lock

168 Pin DIMM Memory Sockets

20 Pins 60 Pins 88 Pins

R

The Dual Inline Memory Module (DIMM) memory modules must be 3.3Volt Un-

buffered Synchronous DRAM (SDRAM) or Extended Data Output (EDO) . You

can identify the type of DIMM module by the illustration below:

168-Pin DIMM Notch Key Definitions (3.3V)

DRAM Key Position Voltage Key Position

Unbuffered

RFU

Buffered Reserved

3.3V

5.0V

The notch on the DIMM module will shift between left, center, or right to identify

the type and also to prevent the wrong type to be inserted into the DIMM slot on the

motherboard. You must ask your retailer for the specifications before purchasing.

Four clock signals are supported on this motherboard.

ASUS P2L97 User’s Manual 19

3. Central Processing Unit (CPU)

This motherboard provides a Single Edge Contact (SEC) slot for a Pentium II pro-

cessor packaged in an SEC cartridge.

Pentium II Processor

WARNING! Be sure that sufficient air circulation is available across the processor’s pas-

siveheatsink.Withoutsufficientcirculation,the processorcould overheatanddamageboth

the processor and the motherboard.You may install an auxiliary fan, if necessary.

You should check to see that you have the following 9 items. (NOTE: The pictures

in the following pages will have the same item numbers next to them for your refer-

ence. The design and color of your items may be slightly different.)

Attach Mount Bridges (Items 1,2)

(Factory Installed)

(1)

(2)

Pentium II Retention Mechanism (Item 3)

Lock Holes

Captive Nut

(3)

Pentium II Processor Heatsink (Item 8)

(8)

Heatsink bottom Groove

for the Support Top Bar

Larger Fin should

be on the bottom.

Heatsink Support Base/Top Bar (Items 4-7)

Top Bar (4)

Base (7)

Posts

(5)

(6)

Intel Pentium II Processor in a SEC Cartridge

(233-333MHz 256/512KB L2 Cache)

CPU (Item 9)

III. INSTALLATION

(CPU)

III. INSTALLATION

20 ASUS P2L97 User’s Manual

III. INSTALLATION

(CPU)

III. INSTALLATION

The Motherboard As Shipped

Four screws should be showing next to each corner of the SEC CPU Slot using two

attach mount bridges from the underside of the motherboard.

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 chipsets (see

motherboard layout for the location of the Intel chipset).

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

NOTE: Encircled items are screws

from the mount bridges (1 & 2)

SEC CPU slot

Asus P2L97 User manual

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