Asus KN97 User manual

R
KN97-X
Pentium®II ATX Motherboard
USER’S MANUAL

ASUS KN97-X User’s Manual
2
USER'S NOTICE
Product Name: ASUS KN97-X
Manual Revision: 1.04
Release Date: April 1997
No part of this product, including the product and software may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any lan-
guageinanyformbyanymeanswithouttheexpresswrittenpermissionofASUSTeK
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 shallASUS be liable for any loss or profits, loss of
business, loss of use or data, interruption of business, or for indirect, special, inci-
dental, 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 andAcrobat 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.

ASUS KN97-X User’s Manual 3
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC.
Marketing Info:
Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112, ROC
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support:
Fax: [phone]
BBS: 886-2-896-4667
Email: [email protected]
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: [email protected]
Technical Support:
BBS: 1-408-474-0555
Email: [email protected]
ASUS COMPUTER GmbH
Marketing Info:
Address: Harkort Str. 25, 40880 Ratingen, BRD, Germany
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support:
BBS: 49-2102-448690
Email: [email protected]

ASUS KN97-X User’s Manual
4
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

ASUS KN97-X User’s Manual 5
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 INTAssignment .....................................................63
Terminator Settings ..................................................................63
SCSI ID Numbers ....................................................................64
The Following Sections are Available with Optional Audio Only
Creative Labs ViBRA16C 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
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 forconnectionofthemonitortothegraphics
card is required to assure compliance with FCC regulations. Changes or modifica-
tions 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 KN97-X 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 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.
þThe ASUS KN97-X motherboard
þRetention Mechanism & Heat Sink Support Brace
þ1 IDE ribbon cable
þ1 floppy ribbon cable
þSupport drivers and utilities as follows (view FILELIST.TXT for details)
• LANDesk
®
Client Manager (LDCM) Software
• Flash Memory Writer utility to update the FLASH BIOS
• Desktop Management Interface (DMI) utility
• Audio drivers and utilities (with optional onboardAudio)
• Readme files for descriptions and use of the files
• Technical Support Form
þThis user’s manual
¨Optional infrared module
¨Optional ASUS PCI-SC200 Fast-SCSI card
I. INTRODUCTION
I. INTRODUCTION
(Manual / Checklist)

8ASUS KN97-X User’s Manual
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
®
II (233MHz-266MHz) processor.
•Intel Chipset: Features Intel’s 440FX PCIset 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 three 16-bit ISA, and five 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. 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
externalcard. SupportsJapanesestandard“Floppy3 mode”(3.5inch1.2MB).
• 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 chan-
nels, provides faster data transfer rates, and supports Enhanced IDE devices
such asTape 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.
•Versatile 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.
•OptionalIrDAConnector: Supports an optional infrared port module for wire-
less interface.
•ConcurrentPCI-ConcurrentPCIallowsmultiplePCItransfers from PCI master
busses to memory to CPU.
II. FEATURES
(KN97-X Series)
II. FEATURES

ASUS KN97-X User’s Manual 9
II. FEATURES
II. FEATURES
(KN97 Series)
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 andAlert - 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 andAlert - 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 re-
source monitor will warn the user before the system resources are used up to
prevent possible application crashes. Suggestions will give the user informa-
tion 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 vi-
ruses will not only destroy data on storage media, but also clear BIOS data
which is usually unprotected. ASUS KN97 series of motherboards were de-
signed to cooperate with BIOS, chipset, and flash EPROM to disable write per-
mission when the system’s initialization stage is completed upon boot-up.

10 ASUS KN97-X User’s Manual
(This page was intentionally left blank)

ASUS KN97-X User’s Manual 11
Parts of the ASUS KN97-X Motherboard
II. FEATURES
II. FEATURES
(Parts of Board)
Intel’s 440FX
PCIset Pentium II
CPU Slot
5 PCI Slots
3ISASlots
1 DIMM Socket
T: USB Port 1
B: USB Port 2
Programmable
Flash ROM
T: PS/2 Mouse
B: PS/2 Keyboard
T: Parallel Conn.
B: Serial Conn.
Optional
T:Joystick/Midi
B:Out/In/Mic
COM 1
COM 2
Hardware
Monitor
Floppy / IDE
Intel PIIX3
PCIset
Optional
Creative LabsAudio
Multi-I/O
Optional
3D Sound

12 ASUS KN97-X User’s Manual
III. INSTALLATION
Map of the ASUS KN97-X Motherboard
USB
PS/2
Keyboard BIOS
ISA Slot 3
ISA Slot 2
ISA Slot 1
PCI Slot 1
PCI Slot 2
PCI Slot 4
PCI Slot 3
PCI Slot 5 Flash ROM
for BIOS
Intel PIIX3
PCIset
Intel 440FX
PCIset
Intel 440FX
PCIset
COM 1
Parallel Port
COM 2
Top: USB 1
Bottom:
USB 2
Top: Mouse
Bottom:
Keyboard
DIMM Socket
Board Power Input
for ATX Power Supply
CR2032
3 Volt
Lithium Cell
Pentium II CPU Cartridge Slot
Floppy Drives Secondary IDE Primary IDE
R
Panel
IDE LED
Chassis Fan
CPU_FAN
PWR_FAN
Panasonic CD In
Sony CD In
Mitsumi CD In
Infrared Connect
Volume Control
FS0 FS1
BUS FREQ
CPU Voltage ID
01234
BUS FREQ.
BF0
BF1
BF2
BF3
Chasis open
alarm lead
Battery Test
Creative
®
Modem
Connector
RTC Clear Audio En/Dis Boot Block Write Multi I/O En/Dis
Hardware
Monitor
LM78
Mic Line In Line Out
Game/Midi Port
Creative
Labs
Audio
3D
Sound
NOTE: The items in Outline are available only with the optional onboardAudio.
(Map of Board)
III. INSTALLATION

ASUS KN97-X User’s Manual 13
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 LEDActivity 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) ATXPWR p. 32 Motherboard Power Connector (20-pin Block)
*ISANOTE: 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#.
(Map of Board)
III. INSTALLATION

14 ASUS KN97-X User’s Manual
III. INSTALLATION
(Jumpers)
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
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 components contain very delicate
Integrated Circuit (IC) chips. To protect the motherboard and other compo-
nents against damage from static electricity, you should follow some precau-
tions 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.

ASUS KN97-X User’s Manual 15
III. INSTALLATION
Jumper Settings
1. Onboard Multi-I/O Selection (IOEN)
You can selectively disable each onboard Multi-I/O item (floppy, serial, paral-
lel, and IrDA) through Chipset Features Setup of BIOS SOFTWARE or dis-
able 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]
R
Multi I/O Setting (Enable / Disable)
Disabled
Enable (Default)
IOEN
123
123 IOEN
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 FlashMemoryWriterUtility as shown in BIOS SOFTWARE.
Programming BBLKW
Disabled/Protect [1-2] (Default)
Enabled [2-3]
R
Boot Block Programming (Disable / Enable)
Enabled / Program
BBLKW
Disabled / Protected
(Default)
BBLKW 123
123
III. INSTALLATION
(Jumpers)

16 ASUS KN97-X User’s Manual
III. INSTALLATION
(Jumpers)
III. INSTALLATION
3. OnboardAudio 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]
R
Onboard Audio (Enable / Disable)
Enable
(Default)
AUDIO
Disable
AUDIO
123
123
4. Onboard DigitalAudio Control (VOLADJ) (with optional onboard Audio)
This jumper allows you to adjust the audio volume digitally using case mounted
momentary buttons.
AudioAdjustment VOLADJ
Volume Up [1-2] (momentary)
Volume Down [4-5] (momentary)
R
Onboard Digital Audio Adjustment
1
2
3
VOLADJ
5
4
Ground
Volume Up
Ground
Ground
Volume Down

ASUS KN97-X User’s Manual 17
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
RTC RAM (Operation / Clear Data)
Operation (Default)
RTCLR
Clear Data
RTCLR
123 123
6. Battery Test Jumper (BATTERY TEST)
You can test the battery’s current by removing this jumper and attaching a cur-
rent 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
Battery Test (Operation / Test)
Operation (Default)
BATTERY TEST
Test Mode
BATTERY TEST
III. INSTALLATION
(Jumpers)
III. INSTALLATION

18 ASUS KN97-X User’s Manual
III. INSTALLATION
(Jumpers)
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 Ratioequals the CPUs Internalfrequency(the advertisedCPUspeed).
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.
R
CPU : BUS Frequency Ratio
CPU External Clock (BUS)
Frequency Selection
BF1
BF0
BF3
BF2
2.5X
4.5X
BF1
BF0
BF3
BF2
3.0X
5.0X
60MHz
123
FS0
FS1
66MHz
123
BF1
BF0
BF3
BF2
4.0X
Reserved
BF1
BF0
BF3
BF2
3.5X
5.5X
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.

ASUS KN97-X User’s Manual 19
III. INSTALLATION
2. System Memory (SIMM and DIMM)
This motherboard supports four 72-pin SIMMs (Single Inline Memory Modules) of
4MB,8MB,16MB,32MB,or64MBtoformamemorysizebetween8MBto256MB.
The DRAM can be either 60ns or 70ns Fast Page Mode (FPM) (Asymmetric or
Symmetric),EnhancedData 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.
III. INSTALLATION
(System Memory)

20 ASUS KN97-X User’s Manual
III. INSTALLATION
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.
R
72 Pin SIMM DRAM Sockets
1
Bank 0 Bank 1
2
3
4
(DRAM Memory Module Example)
Notched End
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.
Metal Clip
Plastic Safety Tab (This Side Only) Mounting Hole
72
Pi
n
DRAM
i
n
SIMM
S
oc
k
et
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”.
(System Memory)
III. INSTALLATION