ASUS KN97X User Manual

R

KN97-X

Pentium® II ATX Motherboard

USER’S MANUAL

USER'S NOTICE

No part of this product, including the product and software may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any lan­guage in any form by any means without the express written permission of ASUST eK
COMPUTER INC. (hereinafter referred to as ASUS) except documentation kept
by the purchaser for backup purposes.

Specifications are subject to change without notice. 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 merchantability or fitness for a
particular purpose. In no event shall ASUS be liable for any loss or profits, loss of
business, loss of use or data, interruption of business, or for indirect, special, inci­dental, or consequential damages of any kind, even if ASUS has been advised of
the possibility of such damages arising from any defect or error in this manual or
product. ASUS may revise this manual from time to time without notice.

Products mentioned in this manual are mentioned for identification purposes only.
Product names appearing in this manual may or may not be registered trademarks
or copyrights of their respective companies.

• Intel, LANDesk, and Pentium are registered trademarks of Intel Corporation.

• IBM is a registered trademark of International Business Machines Corp.

• 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. For previous or updated manuals,
BIOS, drivers, or product release information you may visit the ASUS home page
at http://www.asus.com.tw/ or contact ASUS from the following page.

© Copyright 1997 ASUSTeK COMPUTER INC. All rights reserved.

Product Name: ASUS KN97-X
Manual Revision: 1.04
Release Date: April 1997

2

ASUS KN97-X User’s Manual

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC.

Marketing Info:

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

Technical Support:

Fax: [phone]
BBS: 886-2-896-4667
Email: [e-mail]
WWW: http://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: [phone]
Fax: [phone]
Email: [e-mail]

Technical Support:

BBS: 1-408-474-0555
Email: [e-mail]

ASUS COMPUTER GmbH

Marketing Info:

Address: Harkort Str. 25, 40880 Ratingen, BRD, Germany
Telephone: [phone]
Fax: [phone]
Email: [e-mail]

Technical Support:

BBS: 49-2102-448690
Email: [e-mail]

ASUS KN97-X User’s Manual 3

CONTENTS

I. INTRODUCTION...........................................................................7

How this manual is organized..........................................................7

Item Checklist ..................................................................................7

II. FEATURES ....................................................................................8

Features of the ASUS KN97-X Motherboard ..................................8

Parts of the ASUS KN97-X Motherboard................................11

III. INSTALLATION ........................................................................12

Map of the ASUS KN97-X Motherboard ......................................12

Installation Steps............................................................................14

1. Jumpers ......................................................................................14

Jumper Settings ..................................................................15

2. System Memory (SIMM and DIMM) ......................................19

SIMM Memory Installation................................................20

DIMM Memory Installation ...............................................21

3. Central Processing Unit (CPU).................................................22

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

5. External Connectors..................................................................28

Power Connection Procedures .................................................35

IV. BIOS SOFTWARE .....................................................................36

Support Software ...........................................................................36

Flash Memory Writer Utility .........................................................36

Main Menu .........................................................................36

Advanced Features Menu ...................................................37

Updating your Motherboard's BIOS ........................................38

6. BIOS Setup ...............................................................................39

Load Defaults .....................................................................40

Standard CMOS Setup .............................................................40

Details of Standard CMOS Setup:......................................40

BIOS Features Setup ................................................................43

Details of BIOS Features Setup..........................................43

Chipset Features Setup .............................................................46

Details of Chipset Features Setup.......................................46

Power Management Setup........................................................49

Details of Power Management Setup .................................49

PNP and PCI Setup ..................................................................51

Details of PNP and PCI Setup ............................................51

Load BIOS Defaults .................................................................53

Load Setup Defaults .................................................................53

Smart Alarm (LM78) Setup .....................................................54

4

ASUS KN97-X User’s Manual

CONTENTS

Details of Smart Alarm Setup.............................................54

Supervisor Password and User Password ................................55

IDE HDD Auto Detection ........................................................57

Save and Exit Setup .................................................................57

Exit Without Saving .................................................................57

V. DESKTOP MANAGEMENT......................................................58

Desktop Management Interface (DMI)..........................................58

Introducing the ASUS DMI Configuration Utility .............58

System Requirements .........................................................58

Using the ASUS DMI Configuration Utility ......................59

Notes:..................................................................................59

VI. ASUS PCI-SC200 SCSI Card....................................................61

SCSI BIOS and Drivers .................................................................61

The ASUS PCI-SC200 SCSI Interface Card .................................62

Setting Up the ASUS PCI-SC200 ............................................62

Setting the INT Assignment .....................................................63

Terminator Settings ..................................................................63

SCSI ID Numbers ....................................................................64

The Following Sections are Available with Optional Audio Only

Creative Labs ViBRA 16C Series.......................................................1

Audio Drivers Installation ..................................................................3

Manual Information ...................................................................3

ASUS Installation CD ................................................................3

ASUS Audio Driver CD Contents ........................................3

Win95 Audio Drivers...........................................................................4

3D Sound....................................................................................5

Win3.x Audio Drivers..........................................................................7

Configuration Manager ..............................................................7

Creative PnP Configuration Manager (CTCM) .........................7

ASUS 3D Sound ........................................................................8

Audio Software ..........................................................................9

3D Sound..................................................................................13

Environment Variables .............................................................15

SOUND Environment variable...........................................15

BLASTER Environment Variable ......................................15

MIDI Environment Variable ...............................................16

Maximum Recording Rates for the Audio Hardware.........16

Windows 95 Software.......................................................................... I

DOS & Windows 3.x Software ........................................................... I

ASUS KN97-X 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 KN97-X 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 Setup: BIOS software setup information.
V. DMI Utility: BIOS supported Desktop Management Interface
VI. ASUS PCI-SC200: Installation of an optional Fast-SCSI card.
VII. Windows 95: Audio Software Manual (with optional onboard Audio)
VIII. DOS/Win3.1x: Audio Software Manual (with optional onboard Audio)

Item Checklist

Please check that your package is complete. If you discover damaged or missing
items, please contact your retailer.

I. INTRODUCTION

(Manual / Checklist)

þ The ASUS KN97-X motherboard
þ Retention Mechanism & Heat Sink Support Brace
þ 1 IDE ribbon cable
þ 1 floppy ribbon cable
þ Support drivers and utilities as follows (view FILELIST.TXT for details)

®

• LANDesk

• Flash Memory Writer utility to update the FLASH BIOS

• Desktop Management Interface (DMI) utility

• Audio drivers and utilities (with optional onboard Audio)

• Readme files for descriptions and use of the files

• Technical Support Form

þ This user’s manual
¨ Optional infrared module
¨ Optional ASUS PCI-SC200 Fast-SCSI card

Client Manager (LDCM) Software

ASUS KN97-X User’s Manual 7

Features of the ASUS KN97-X Motherboard

The ASUS KN97-X is carefully designed for the demanding PC user who wants
many features processed by the fastest CPU in a small package. This motherboard:

• Multi-Speed Support: Intel Pentium

• Intel Chipset: Features Intel’s 440FX PCIset with I/O subsystems.

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

(KN97-X Series)

II. FEATURES

• ISA & PCI Expansion Slots: Provides three 16-bit ISA, and five 32-bit PCI slots.

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

• Desktop Management Interface (DMI): Supports DMI through BIOS which

II. FEATURES

®

II (233MHz-266MHz) processor.

drives, PS/2 mouse, and Plug and Play devices to make setup of hard drives,
expansion cards, and other devices virtually automatic.

one parallel port with EPP and ECP capabilities. UART2 can also be directed
from COM2 to the Infrared Module for wireless connections. 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” (3.5inch 1.2MB).

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, provides faster data transfer rates, and supports Enhanced IDE devices
such as T ape Backup and CD-ROM drives. This controller supports PIO Modes
3 and 4 and Bus Master IDE DMA Mode 2. BIOS now supports IDE CD-

ROM or SCSI bootup.

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

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

• V ersatile Memory Support: Is equipped with one DIMM socket to support (8,

16, 32, 64, or 128MB) 168-pin 5Volt EDO DRAM memory modules and four
SIMM sockets to support (4, 8, 16, 32, or 64MB) 72-pin Fast Page Mode (FPM)
or Extended Data Output (EDO), or Burst EDO SIMMs. Maximum memory of
SIMMs and/or DIMMs not to exceed 384MB.

• Optional PS/2 Mouse, USB, IrDA Connector: Supports an optional cable and

bracket set to mount the connectors to an expansion slot on the system chassis. A
second IrDA connector is available for a standard individual infrared cable set.

• SCSI BIOS: Has firmware to support optional ASUS SCSI controller cards.

®

• Optional Audio: Optional onboard Creative Labs

Audio with 3D sound.

• Optional IrDA Connector: Supports an optional infrared port module for wire-

less interface.

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

busses to memory to CPU.

8 ASUS KN97-X User’s Manual

II. FEATURES

Intelligence:

• 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.

• Temperature Monitoring and Alert - To prevent system overheat and system

damage, there is a heat sensor on the motherboard itself to monitor the system
temperature to make sure the system is operating at a safe heat level to avoid any
failures triggered by extremely high temperature.

• 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.

• System Resources Alert - Today’s operating systems, such as Windows 95,

Windows 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.

• Virus Write Protection - Normally, viruses can destroy data on storage media

such as hard disk drives, floppy diskettes, and MOs. Some new-generation vi­ruses will not only destroy data on storage media, but also clear BIOS data
which is usually unprotected. ASUS KN97 series of motherboards were de­signed to cooperate with BIOS, chipset, and flash EPROM to disable write per­mission when the system’s initialization stage is completed upon boot-up.

(KN97 Series)

II. FEATURES

ASUS KN97-X User’s Manual 9

(This page was intentionally left blank)

10 ASUS KN97-X User’s Manual

II. FEATURES

Parts of the ASUS KN97-X Motherboard

T: PS/2 Mouse
B: PS/2 Keyboard

T: USB Port 1
B: USB Port 2

COM 1
T: Parallel Conn.

B: Serial Conn.

COM 2

Optional
T:Joystick/Midi
B:Out/In/Mic

5 PCI Slots

1 DIMM Socket

Intel’s 440FX
PCIset

Pentium II
CPU Slot

Floppy / IDE

II. FEATURES

(Parts of Board)

Multi-I/O

Optional
3D Sound

Optional
Creative Labs Audio

3 ISA Slots

Intel PIIX3
PCIset

Hardware
Monitor

Programmable
Flash ROM

ASUS KN97-X User’s Manual 11

III. INSTALLATION

Map of the ASUS KN97-X Motherboard

01234

PS/2

USB

Top: Mouse
Bottom:
Keyboard

Top: USB 1
Bottom:
USB 2

COM 1

Board Power Input
for ATX Power Supply

Intel 440FX
PCIset

CPU Voltage ID

BF0
BF1
BF2
BF3

BUS FREQ.

Battery Test

CR2032
3 Volt
Lithium Cell

III. INSTALLATION

(Map of Board)

Parallel Port

COM 2

Game/Midi Port

Mic Line In Line Out

3D
Sound

Creative
Labs
Audio

DIMM Socket

PCI Slot 1

PCI Slot 2

PCI Slot 3

Panasonic

CD In

PCI Slot 4

PCI Slot 5

ISA Slot 1

ISA Slot 2

Creative® Modem
Connector

ISA Slot 3

Sony CD In
Mitsumi CD In

R

Intel 440FX
PCIset

Intel PIIX3
PCIset

CPU_FAN

PWR_FAN

Pentium II CPU Cartridge Slot

Floppy Drives

Secondary IDE

FS0

FS1

BUS FREQ

Flash ROM

Audio En/Dis

Boot Block Write

for BIOS

Keyboard BIOS

Chassis Fan

IDE LED

Chasis open
alarm lead

RTC Clear

Multi I/O En/Dis

LM78

Hardware
Monitor

Primary IDE

Volume Control

Infrared Connect

Panel

NOTE: The items in Outline are available only with the optional onboard Audio.

12 ASUS KN97-X User’s Manual

III. INSTALLATION

Jumpers

1) IOEN p. 15 Multi-I/O Selection (Enable/Disable)

2) BBLKW p. 15 Flash ROM Boot Block Program (Disable/Enable)

3) AUDIO (optional) p. 16 Onboard Audio (Disable/Enable)

4) VOLADJ (optional) p. 16 Digital Volume Level Adjustment (Up/Down)

5) RTCLR p. 17 Real Time Clock RAM (Operation/Clear Data)

6) BATTERY TEST p. 17 Battery Test Lead (Operation/Test Mode)

7) FS0, FS1 p. 18 CPU External Clock (BUS) Frequency Selection

8) BF0, BF1, BF2, BF3 p. 18 CPU:BUS Frequency Ratio

Expansion Slots

1) System Memory p. 19 System Memory Support

2) SIMM Sockets p. 20 SIMM Memory Module Support

3) DIMM Sockets p. 21 DIMM Memory Module Support

2) Pentium II CPU Slot p. 22 Central Processing Unit (CPU) Cartridge Support

3) ISA Slots p. 24 16-bit ISA Bus Expansion Slots*

4) PCI Slots p. 24 32-bit PCI Bus Expansion Slots*

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 Female)

5) AUDIO (optional) p. 27 Audio Port -Line Out, Line In, Mic (Three 1/8” Female)

6) GAME (optional) p. 28 Joystick/Midi Connector (15-pin Female)

7) USB p. 28 Universal Serial BUS Ports 1 & 2 (Two 4-pin Female)

8) FLOPPY p. 28 Floppy Drive Connector (34-pin Block)

9) FANPWR1, 2, 3 p. 29 Chassis, CPU, Power Supply Fan Power (3-pin Block)

10) CHASSIS p. 29 Chassis Open Alarm Lead (3-pin Block)

11) IDE1, IDE2 p. 30 Primary / Secondary IDE Connector (40-pin Blocks)

12) IDELED p. 30 IDE LED Activity Light

13) PWR LED (PANEL) p. 31 System Power LED (2-pins)

14) SMI (PANEL) p. 31 SMI Switch Lead (2-pins)

15) PWR SW (CON1) p. 31 ATX Power & Soft-Off Switch Lead (2-pins)

16) RESET (PANEL) p. 31 Reset Switch Lead (2-pins)

17) KEYLOCK (PANEL) p. 31 Power LED (3-pins) & Keyboard Lock Switch (2-pins)

18) SPEAKER (PANEL) p. 31 Speaker Output Connector (4-pins)

19) IR p. 32 Infrared Port Module Connector

20) A TXPWR p. 32 Motherboard Power Connector (20-pin Block)

(Map of Board)

III. INSTALLATION

*ISA NOTE: The onboard hardware monitor uses the address 290H so legacy ISA
cards must not use this address or else conflicts will occur.

*PCI NOTE: 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#.

ASUS KN97-X User’s Manual 13

III. INSTALLATION

Installation Steps

Before using your computer, you must complete the following steps:

1. Set Jumpers on the Motherboard

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 “Map of the Motherboard” on page 4 for locations

III. INSTALLATION

(Jumpers)

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

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
with two pins will be shown as
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 components contain very delicate
Integrated Circuit (IC) chips. To protect the motherboard and other compo­nents against damage from static electricity, you should follow some precau­tions whenever you work on your computer.

1. Unplug your computer when working on the inside.

2. Hold components by the edges and try not to touch the IC chips, leads, or
circuitry.

3. Use a grounded wrist strap or touch a grounded source to discharge any
static electricity before handling computer 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.

to connect pins 1&2 and to connect pins 2&3. Jumpers

for Short (On) and for Open (Off). For

or on the left

Pin 1

when holding the

14 ASUS KN97-X User’s Manual

III. INSTALLATION

Jumper Settings

1. Onboard Multi-I/O Selection (IOEN)

You can selectively disable each onboard Multi-I/O item (floppy, serial, paral­lel, and IrDA) through Chipset Features Setup of BIOS SOFTWARE or dis­able all Multi-I/O items at once with the following jumper in order to use your
own Multi-I/O card.

Multi-I/O IOEN

Enable [1-2] (Default)
Disable [2-3]

IOEN

R

123

Enable (Default)

Multi I/O Setting (Enable / Disable)

IOEN

123

Disabled

2. Flash ROM Boot Block Programming (BBLKW)

This sets the operation mode of the boot block area of the Programmable Flash
ROM to allow programming in the Enabled position. This is required only if
prompted by the Flash Memory Writer Utility as shown in BIOS SOFTW ARE.

Programming BBLKW

Disabled/Protect [1-2] (Default)
Enabled [2-3]

(Jumpers)

III. INSTALLATION

R

BBLKW

123

Disabled / Protected
(Default)

Boot Block Programming (Disable / Enable)

BBLKW

123

Enabled / Program

ASUS KN97-X User’s Manual 15

III. INSTALLATION

3. Onboard Audio Selection (AUDIO) (with optional onboard Audio)

This jumper allows you to Disable the onboard audio chipset inorder to use your
own audio card. Otherwise, leave on default of Enabled.

Onboard Audio AUDIO

Enabled [1-2] (Default)
Disabled [2-3]

III. INSTALLATION

(Jumpers)

R

AUDIO

123

Enable
(Default)

Onboard Audio (Enable / Disable)

AUDIO

123

Disable

4. Onboard Digital Audio Control (VOLADJ) (with optional onboard Audio)

This jumper allows you to adjust the audio volume digitally using case mounted
momentary buttons.

Audio Adjustment VOLADJ

Volume Up [1-2] (momentary)
Volume Down [4-5] (momentary)

R

VOLADJ

1
2
3
4
5

Ground
Volume Up
Ground
Volume Down
Ground

Onboard Digital Audio Adjustment

16 ASUS KN97-X User’s Manual

III. INSTALLATION

5. Real Time Clock (RTC) RAM (RTCLR)

The CMOS RAM is powered by the onboard button cell battery. To clear the
RTC data: (1) Turn off your computer, (2) Move this jumper to “Clear Data,”
(3) Move the jumper back to “Operation,” (4) Turn on your computer, (5) Hold
down <Delete> during bootup and enter BIOS setup to re-enter user preferences.

RTC RAM RTCLR

Operation [2-3] (Default)
Clear Data [1-2] (momentarily)

R

RTCLR

123

Operation (Default)

RTC RAM (Operation / Clear Data)

RTCLR

123

Clear Data

6. Battery Test Jumper (BATTERY TEST)

You can test the battery’s current by removing this jumper and attaching a cur­rent meter the two pins. WARNING: You must unplug the power cord to

your power supply to ensure that there is no power to your motherboard.
The CMOS RAM containing BIOS setup information may be cleared by
this action. You should enter BIOS to “Load Setup Defaults” and re-enter
any user information after removing and reapplying this jumper.

R

BATTER Y TEST

BATTER Y TEST

(Jumpers)

III. INSTALLATION

Operation (Default)

Battery Test (Operation / Test)

Test Mode

ASUS KN97-X User’s Manual 17

III. INSTALLATION

7. CPU External (BUS) Frequency Selection (FS0, FS1)

These jumpers tell the clock generator what frequency to send to the CPU. These
allow the selection of the CPUs External frequency (or BUS Clock). The BUS Clock
times the BUS Ratio equals the CPUs Internal frequency (the advertised CPU speed).

8. CPU to BUS Frequency Ratio (BF0, BF1, BF2, BF3)

These jumpers set the frequency ratio between the Internal frequency of the CPU
and the External frequency (called the BUS Clock) within the CPU. These must
be set together with the above jumpers CPU External (BUS) Frequency Selection.

III. INSTALLATION

(Jumpers)

FS0
FS1

BF0

123

60MHz

3.0X

BF3

BF2

5.0X

CPU External Clock (BUS)
Frequency Selection

3.5X

BF1

BF0

BF3

BF2

5.5X

BF1

BF0

4.0X

BF1

BF3

BF2

Reserved

BF0

123

R

66MHz

2.5X

BF1

BF3

BF2

4.5X

CPU : BUS Frequency Ratio

Set the jumpers by the Internal speed of the Intel, AMD, or Cyrix CPU as follows:

(BUS Freq.) (Freq. Ratio)

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

Intel Klamath 266MHz 4.0x 66MHz [2-3] [1-2] [short] [open] [short] [short]
Intel Klamath 233MHz 3.5x 66MHz [2-3] [1-2] [short] [short] [open] [open]

Intel Pentium II CPU Cartridge
(233-266MHz 256/512KB L2 Cache)

NOTE: Voltage Regulator Output Selection (VID) is not needed for the Pentium II
CPU Cartridge because this CPU sends a VID signal directly to the onboard power
controller .

18 ASUS KN97-X User’s Manual

III. INSTALLATION

2. System Memory (SIMM and DIMM)

This motherboard supports four 72-pin SIMMs (Single Inline Memory Modules) of
4MB, 8MB, 16MB, 32MB, or 64MB to form a memory size between 8MB to 256MB.
The DRAM can be either 60ns or 70ns Fast Page Mode (FPM) (Asymmetric or
Symmetric), Enhanced Data Output (EDO), or Burst Enhanced Data Output (BEDO).
SIMMs must be installed in pairs so that each bank contains two of the same size
memory modules. A new feature is the support of Dual Inline Memory Modules
(DIMMs). One slot is available for a 5.0Volt (power level) Enhanced Data Output
(EDO) DRAM of either 8, 16, 32, 64, or 128MB. Maximum memory of SIMMs
and/or DIMMs must be 384MB or less.

Install memory in any or all Banks in combinations as follows:

Bank Memory Module Total Memory
Bank 0 4MB, 8MB, 16MB, 32MB, 64MB x2

SIMM Slots 1&2 72-pin FPM, EDO, BEDO SIMM
Bank 1 4MB, 8MB, 16MB, 32MB, 64MB x2

SIMM Slots 3&4 72-pin FPM, EDO, BEDO SIMM
Bank 2 8MB, 16MB, 32MB, 64MB, 128MB x1

DIMM Slot 1 168-pin 5V EDO DRAM DIMM

Total System Memory (Max 384MB) =

IMPORTANT:

• The same size and type (FPM, EDO, BEDO) of memory must be installed in
pairs so that memory modules are not mixed in each bank.

• The DIMM Slot does not support any SDRAM DIMM modules.

• The DIMM Slot does not support 3.3V EDO DIMM modules.

• Do not use SIMM memory modules with more than 24 chips per module. SIMM
memory modules with more than 24 chips exceed the design specifications of
the memory subsystem and will be unstable.

• Memory speed setup is required through “Auto Configuration” in BIOS Chipset
Setup of the BIOS SOFTWARE. If both 60ns and 70ns memory are used, you
must set Auto Configuration to 70ns.

(System Memory)

III. INSTALLATION

ASUS KN97-X User’s Manual 19

III. INSTALLATION

DRAM in SIMM Sock

SIMM Memory Installation

1. The SIMM memory modules will only fit in one orientation as shown because
of a “Plastic Safety Tab” on one end of the SIMM slots which requires the
“Notched End” of the SIMM memory modules.

III. INSTALLATION

(System Memory)

72 Pin SIMM DRAM Sockets

2. Press the memory module firmly into place starting from a 45 degree angle
making sure that all the contacts are aligned with the socket.

3. With your finger tips, rock the memory module into a vertical position so that it
clicks into place.

Bank 0 Bank 1

R

(DRAM Memory Module Example)

Notched End

72 Pin

Metal Clip

et

1
2
3
4

Plastic Safety Tab (This Side Only)

Mounting Hole

4. The plastic guides should go through the two “Mounting Holes” on the sides
and the “Metal Clips” should snap on the other side.

5. To release the memory module, squeeze both “Metal Clips” outwards and rock
the module out of the “Metal Clips”.

20 ASUS KN97-X User’s Manual