ASUS HX97 User Manual

R

HX97

Pentium® 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.

• 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 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 HX97
Manual Revision: 1.01
Release Date: April 1997

2 ASUS HX97 User’s Manual

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC.

Marketing Info:

Address: 150 Li-Te Road, Peitou, Taipei, Taiwan, 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 HX97 User’s Manual 3

CONTENTS

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

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

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

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

Features of the ASUS HX97 Motherboard ...................................... 8

Parts of the ASUS HX97 Motherboard............................................ 9

III. INSTALLATION .......................................................................... 10

Map of the ASUS HX97 Motherboard ............................................ 10

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

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

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

Compatible Cyrix CPU Identification .................................. 15

2. System Memory (SIMM)............................................................ 17

SIMM Memory Installation .................................................. 18

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

4. Expansion Cards ......................................................................... 20

Expansion Card Installation Procedure: ............................... 20

Assigning IRQs for Expansion Cards................................... 20

Assigning DMA Channels for ISA Cards ............................. 21

5. External Connectors .................................................................... 22

Power Connection Procedures ................................................... 31

IV. BIOS SOFTWARE ....................................................................... 32

Support Software ............................................................................. 32

Flash Memory Writer Utility ........................................................... 32

Main Menu ........................................................................... 32

Advanced Features Menu ..................................................... 33

Managing & Updating your Motherboard's BIOS ..................... 34

6. BIOS Setup ................................................................................. 35

Load Defaults ....................................................................... 36

Standard CMOS Setup ............................................................... 36

Details of Standard CMOS Setup: ........................................ 37

BIOS Features Setup .................................................................. 39

Details of BIOS Features Setup ............................................ 39

Chipset Features Setup ............................................................... 42

Details of Chipset Features Setup......................................... 42

Power Management Setup.......................................................... 46

Details of Power Management Setup ................................... 46

PNP and PCI Setup .................................................................... 48

Details of PNP and PCI Setup .............................................. 48

Load BIOS Defaults ................................................................... 50

Load Setup Defaults ................................................................... 50

Supervisor Password and User Password .................................. 51

IDE HDD Auto Detection .......................................................... 52

Save and Exit Setup ................................................................... 53

Exit Without Saving ................................................................... 53

4 ASUS HX97 User’s Manual

CONTENTS

V. SUPPORT SOFTWARE ................................................................ 54

Desktop Management Interface (DMI)............................................ 54

Introducing the ASUS DMI Configuration Utility ............... 54

System Requirements ........................................................... 54

Using the ASUS DMI Configuration Utility ........................ 55

Notes: .................................................................................... 55

VI. ASUS PCI-SC200 SCSI Card ...................................................... 57

SCSI BIOS and Drivers ................................................................... 57

The ASUS PCI-SC200 SCSI Interface Card ................................... 58

Setting Up the ASUS PCI-SC200 .............................................. 58

Setting the INT Assignment ....................................................... 59

Terminator Settings .................................................................... 59

SCSI ID Numbers ...................................................................... 60

VII. ASUS I-A16C Audio Card ......................................................... 61

ASUS I-A16C Audio Features ................................................... 61

Unpacking and Handling Precautions ........................................ 61

Layout and Connectors .............................................................. 62

Connectors ............................................................................ 62

CD-Audio Connector Pin Definitions ........................................ 62

The Following Sections are Available with ASUS Audio Bundle 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 HX97 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 HX97 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. Support Software: Installation of software drivers and utilities.
VI. ASUS PCI-SC200: Installation of an optional Fast-SCSI card.
VII. ASUS I-A16C: Installation of an optional 16-bit Audio card
VIII. Windows 95: Audio Software Manual (ASUS I-A16C Audio bundle)
IX. DOS/Win3.1x: Audio Software Manual (ASUS I-A16C Audio bundle)

Item Checklist

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

I. INTRODUCTION

(Sections/Checklist)

√ The ASUS HX97 motherboard
√ 2 serial port ribbon cables attached to a mounting bracket
√ 1 parallel ribbon cable with mounting bracket
√ 1 IDE ribbon cable
√ 1 floppy ribbon cable
√ ASUS HX97 Support Drivers:

• Flash Memory Writer utility to update the FLASH BIOS

• Desktop Management Interface (DMI) utility

• Audio drivers and utilities (included with ASUS I-A16C Audio bundle)

• Readme files for descriptions and use of the files

• Technical Support Form

√ This user's manual (Audio sections included with ASUS I-A16C Audio bundle)

Optional ASUS USB/MIR (PS/2 mouse, USB, and IR bracket set)
Optional ASUS PCI-SC200 Fast-SCSI card
Optional ASUS I-A16C Audio Card

ASUS HX97 User’s Manual 7

Features of the ASUS HX97 Motherboard

The ASUS HX97 is carefully designed for the demanding PC user who wants a
simple design with many features in a small package. This motherboard:

• Intel Chipset: Features Intel's 430HX PCIset with I/O subsystems.

• Multi-Processor/Multi-Speed Support: Intel Pentium

(Specifications)

II. FEATURES

• Versatile Memory Support: Is equipped with four SIMM sockets to support

• Error Checking and Correcting (ECC): Using Intel's 430HX PCIset together

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

II. FEATURES

®

75-200MHz (P55C-MMX™,
P54C/P54CS), Cyrix® P166+ (Rev 2.7 & later), AMD-K5™ (PR75-133MHz), AMD­K6™ (PR200-233MHz).

4-64MB 72-pin Fast Page Mode (FPM) or Extended Data Out (EDO) memory
modules up to 256MB.

with parity DRAM modules can detect multi-bit memory errors and correct
1-bit memory errors.

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: Provides four 16-bit ISA slots & 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. UART2 can also be directed
from COM2 to the Infrared Module for wireless connections. T wo floppy drives
of either 5.25" or 3.5" (1.44MB or 2.88MB) are also supported without an exter­nal card. Supports Japanese standard "Floppy 3 mode" (3.5" 1.2MB).

• 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 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.

• Level 2 Cache: 256 or 512KB Pipelined Burst SRAM onboard.

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

bracket set to mount the connectors to an unused expansion slot on the system chas­sis. Second IrDA & PS/2 connectors are available for standard individual cable sets.

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

8 ASUS HX97 User’s Manual

II. FEATURES

Parts of the ASUS HX97 Motherboard

4 ISA Slots

4 PCI Slots

Floppy Conn.

2 IDE Conn.

4 SIMM Sockets

Intel’s 430HX
PCIset

PS/2 Mouse, USB, IrDA

Super Multi-I/O

PS/2 Mouse

Serial, Parallel, Floppy

II. FEATURES

(Parts of Board)

Programmable
Flash ROM

IrDA Connect.
CPU ZIF

Socket 7
Switching Voltage

Regulators

256/512KB Pipelined
Burst L2 Cache

ASUS HX97 User’s Manual 9

III. INSTALLATION

Map of the ASUS HX97 Motherboard

ISA Slot 4

III. INSTALLATION

(Map of Board)

Keyboard BIOS

ISA Slot 3

R

ISA Slot 2

ISA Slot 1

PS/2 Mouse,

USB, IrDA

PCI Slot 4

PCI Slot 3

Intel
PIIX3
PCIset

Super

Multi-I/O

PCI Slot 2

PS/2 Mouse

Serial Ports

COM 1

PCI Slot 1

Parallel (Printer) Port

COM 2

Floppy Drives

Primary IDE

SIMM Socket 1 (32-bit, 72-pin module)

P9

P8

Secondary IDE

01

Row

AT
Keyboard
Connector

SIMM Socket 2 (32-bit, 72-pin module)

01 23 23

SIMM Socket 4 (32-bit, 72-pin module)

SIMM Socket 3 (32-bit, 72-pin module)

Battery T est

CR2032 3Volts
Lithium Cell
(BIOS Power)

Infrared

RTC Clear

IDE (HD) LED

Panel Connectors

Boot Block Write

Flash BIOS

FS1

FS0

FS2

Clock Freq

VID1

VID0

VID2

CPU Voltage

Switching Voltage Regulators

CPU Fan

Freq. Ratio

BF0

BF1

CPU ZIF Socket 7

Intel
430HX
PCIset

256/512KB Pipelined Burst L2 Cache

10 ASUS HX97 User’s Manual

III. INSTALLATION

Jumpers

1) BBLKW p. 13 Flash ROM Boot Block Program (Disable/Enable)

2) RTCLR / BAT p. 14 Real Time Clock RAM (Operation/Clear Data)

3) VID0, VID1, VID2 p. 15 CPU Voltage Selection

4) FS0, FS1, FS2 p. 16 CPU External Clock (BUS) Frequency Selection

5) BF0, BF1 p. 16 CPU:BUS Frequency Ratio

Expansion Slots

1) System Memory p. 17 System Memory Upgrade

2) SIMM Sockets p. 18 72-Pin SIMM Memory Expansion Sockets

3) ZIF Socket 7 p. 19 Central Processing Unit (CPU) Socket

4) PCI Slots p. 20 32-bit PCI Bus Expansion Slots

5) ISA Slots p. 20 16-bit ISA Bus Expansion Slots

Connectors

1) KBCON p. 22 Keyboard Connector (5-pin Female)

2) FLOPPY p. 22 Floppy Drive Connector (34-pin Block)

3) PRINTER p. 23 Parallel (Printer) Port Connector (26-pin Block)

4) COM1, COM2 p. 23 Serial Port COM1 & COM2 (10-pin Blocks)

5) Primary / Second IDE p. 24 Primary / Secondary IDE Connector (40-pin Blocks)

6) IDE (HD) LED p. 24 IDE (HD) Activity Light

7) PS2MOUSE/USB/IR p. 25 PS/2 Mouse/USB/IR Combo-Connector (18-pin Block)

8) IR p. 25 Second Infrared Port Module Connector (5-pin Block)

9) PS2MOUSE p. 26 Second PS/2 Mouse Connector (6-pin Block)

10) TB LED (PANEL) p. 27 Message LED Lead (2-pins)

11) SMI (PANEL) p. 27 SMI Switch Lead (2-pins)

12) RESET (PANEL) p. 27 Reset Switch Lead (2-pins)

13) KEYLOCK (PANEL) p. 27 Keyboard Lock Switch Lead (5-pins)

14) SPEAKER (PANEL) p. 27 Speaker Output Connector (4-pins)

15) FAN p. 28 CPU Cooling Fan Power Lead (3-pin Block)

16) POWER p. 29 Motherboard Power Connector (12-pin Block)

(Map of Board)

III. INSTALLATION

ASUS HX97 User’s Manual 11

III. INSTALLATION

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 [----],

(Jumpers)

[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
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
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 motheboards 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 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.

Pin 1

or on the left

Pin 1

when

12 ASUS HX97 User’s Manual

III. INSTALLATION

Jumper Settings

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

BBLKW

1

R

2
3

Disabled / Protected
(Default)

Boot Block Programming (Disable / Enable)

BBLKW

1
2
3

Enabled

(Jumpers)

III. INSTALLATION

ASUS HX97 User’s Manual 13

III. INSTALLATION

(Jumpers)

III. INSTALLATION

2. Real Time Clock (RTC) RAM

The CMOS RAM is powered by the onboard button cell battery. To clear the
R TC data: (1) T urn of f your computer , (2) Short the two pads (Labeled: SHORT
HERE TO CLEAR CMOS) momentarily with a metallic object ( 3) T urn on your
computer, (4) Hold down <Delete> during bootup and enter BIOS setup to re­enter user preferences.

Battery Test Jumper (For Service Use Only)

You can test the battery’s current by removing this jumper and attaching a cur­rent meter to the 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.

RTC RAM RTCLR

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

BAT

Operation

R

(Default)

Short the solder points to Clear
(This is not a jumper)

Test Mode

Battery Test

RTC RAM Clear

14 ASUS HX97 User’s Manual

III. INSTALLATION

Compatible Cyrix CPU Identification

The only Cyrix CPU that is supported on this motherboard is
labeled Cyrix 6x86 P166+ but must be Revision 2.7 and later .
Look on the underside of the CPU for the serial number . The
number should read G8DC6620A or larger.

3. Voltage Regulator Output Selection (VID0, 1, 2)

These jumpers set the voltage supplied to the CPU. Current Intel CPU's marked
"Pentium" has only a Single Power Plane and uses the standard 3.38 volts (STD)
or 3.5 volts (VRE). Currently Intel’s new Pentium P55C MMX 200MHz with
Dual Power Planes is supported at 2.8Volts. The voltage regulators will automati­cally detect and switch between Single Power Plane and Dual Power Planes.

Pentium MMX (P55C)
(150MHz-233MHz)

Intel Pentium (P54C)
(75MHz-200MHz)

AMD-K6
(PR166 and faster)

AMD-K5
(PR75-PR133)

IBM/Cyrix 6x86(MX)
(PR166 and faster)

IBM/Cyrix 6x86(M1)
(PR166 and faster)

Type Setting Voltage VID0 VID1 VID2

Intel/AMD/Cryix P54C/CS/K5/M1 3.5V(VRE) [1-2] [1-2] [2-3]
Intel/AMD P54C/CS/K5 3.4V(STD) [2-3] [1-2] [2-3]
AMD K6/PR233 3.2V [2-3] [1-2]

[(VID1-3)

-(VID2-3)]

AMD K6/PR166, PR200 2.9V [1-2] [2-3] [2-3]
Intel/Cyrix P55C MMX/M2 2.8V [2-3] [2-3] [2-3]

VID1

VID0

VID2

R

P54C/CS/M1
(VRE3.5V)

Voltage Regulator Output Selection

1

2

3

VID1

VID0

P54C/CS
(STD3.4V)

VID2

VID0

1
2
3

AMDK6-P6166,
PR200 (2.9V)

VID1

VID2

1
2
3

VID1

VID0

VID2

P55C MMC/
Cyrix M2 (2.8V)

VID1

VID0

1
2
3

AMDK6-233 (3.2V)

VID2

1
2
3

(Jumpers)

III. INSTALLATION

ASUS HX97 User’s Manual 15

III. INSTALLATION

4. CPU External (BUS) Frequency Selection (FS0, FS1, FS2)

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

5. CPU to BUS Frequency Ratio (BF0, BF1)

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.

FS1

FS2

FS0

FS0

FS1

FS2

FS0

FS1

FS2

FS0

FS1

FS2

III. INSTALLATION

(Jumpers)

1
2
3

BF1

BF0

3.0x(3/1)

3.0x(3/1)

4.0x(4/1)

R

Complete Names:

Intel Pentium P54C, P55C
AMD K5, K6
Cyrix M1, M2

1
2
3

50MHz

CPU External Clock (BUS) Frequency Selection

P54C/K5
P55C/K6/M2
Cyrix M1

CPU : BUS Frequency Ratio

55MHz

BF1

1.5x(3/2)

3.5X(7/2)

3.0x(3/1)

BF0

1
2
3

BF1

2.0x(2/1)

2.0x(2/1)

2.0x(2/1)

60MHz

BF0

1
2
3

BF1

BF0

2.5x(5/2)

2.5x(5/2)

1.0x(1/1)

66MHz

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

(BUS Frequency) (Freq. Ratio)

CPU Model Freq. Ratio BUS Freq. FS0 FS1 FS2 BF1 BF0

Intel Pentium 200MHz 3.0x 66MHz [2-3] [1-2] [2-3] [2-3] [1-2]
Intel Pentium 166MHz 2.5x 66MHz [2-3] [1-2] [2-3] [2-3] [2-3]
Intel Pentium 150MHz 2.5x 60MHz [2-3] [2-3] [1-2] [2-3] [2-3]
Intel Pentium 133MHz 2.0x 66MHz [2-3] [1-2] [2-3] [1-2] [2-3]
Intel Pentium 120MHz 2.0x 60MHz [2-3] [2-3] [1-2] [1-2] [2-3]
Intel Pentium 100MHz 1.5x 66MHz [2-3] [1-2] [2-3] [1-2] [1-2]
Intel Pentium 90MHz 1.5x 60MHz [2-3] [2-3] [1-2] [1-2] [1-2]
Intel Pentium 75MHz 1.5x 50MHz [2-3] [2-3] [2-3] [1-2] [1-2]

AMD-K6-PR233 233MHz 3.5x 66MHz [2-3] [1-2] [2-3] [1-2] [1-2]
AMD-K6-PR200 200MHz 3.0x 66MHz [2-3] [1-2] [2-3] [2-3] [1-2]
AMD-K6-PR166 166MHz 2.5x 66MHz [2-3] [1-2] [2-3] [2-3] [2-3]

AMD-K5-PR133 100MHz 1.5x 66MHz [2-3] [1-2] [2-3] [1-2] [1-2]
AMD-K5-PR120 90MHz 1.5x 60MHz [2-3] [2-3] [1-2] [1-2] [1-2]
AMD-K5-PR100 100MHz 1.5x 66MHz [2-3] [1-2] [2-3] [1-2] [1-2]
AMD-K5-PR90 90MHz 1.5x 60MHz [2-3] [2-3] [1-2] [1-2] [1-2]
AMD-K5-PR75 75MHz 1.5x 50MHz [2-3] [2-3] [2-3] [1-2] [1-2]

*Cyrix 166+ 133MHz 2.0x 66MHz [2-3] [1-2] [2-3] [1-2] [2-3]

*NOTE: Only Cyrix Rev 2.7 or later is supported on this motherboard. See next page for revision identifi-

cation. Bootup screen will show 6x86-P166+ with the Cyrix 166+ installed on this motherboard.

16 ASUS HX97 User’s Manual

III. INSTALLATION

2. System Memory (SIMM)

This motherboard supports four 72-pin, 32-bit SIMMs (Single Inline Memory Mod­ules) of 4, 8, 16, 32, or 64MB to form a memory size between 8MB to 256MB. The
SIMMs can be either 60ns or 70ns Fast Page Mode (FPM) (Asymmetric or Sym­metric), or Enhanced Data Out (EDO) (BEDO & Parity are not supported). To
support ECC, you must use true (opposed to phantom parity generated by logic
chips) 36-bit parity-type DRAM (e.g. 8 chips + 4 parity chips) in pairs for all mod­ules. Mixing 32-bit non-parity DRAM (e.g. 8 chips) and 36-bit DRAM (e.g. 12
chips) will work minus the ECC feature.

SIMMs must be installed in pairs so that each Row (see Map of Motherboard for Row
locations) contains 64-bits of the same size and type of memory chips. One side (with
memory chips) of the SIMM module takes up half a Row on the motherboard.

IMPORTANT: Memory speed setup is required through "Auto Configura­tion" in BIOS Chipset Setup of the BIOS SOFTWARE. If both 60ns and 70ns
memory are used, set "Auto Configuration" to 70ns. Do not use memory mod­ules with more than 24 chips per module. Modules with more than 24 chips
exceed the design specifications of the memory subsystem and will be unstable.

Memory Socket SIMM Memory Module Total Memory
SIMM Sockets 1&2 4MB, 8MB, 16MB, 32MB, 64MB x2

(Rows 0 & 1) 72-pin FPM or EDO SIMM

SIMM Sockets 3&4 4MB, 8MB, 16MB, 32MB, 64MB x2
(Rows 2 & 3) 72-pin FPM or EDO SIMM

Total System Memory (Max 256MB) =

(System Memory)

III. INSTALLATION

ASUS HX97 User’s Manual 17

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 sockets which requires the
"Notched End" of the SIMM memory modules.

III. INSTALLATION

(System Memory)

III. INSTALLATION

1234

R

Bank 0 Bank 1

Notched End

72 Pin SIMM 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.

Support Clip

Safety Tab (This Side Only)

72 Pin DRAM in SIMM Socket

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".

18 ASUS HX97 User’s Manual

III. INSTALLATION

3. Central Processing Unit (CPU)

The motherboard provides a 321-pin ZIF Socket 7 that is backwards compatible
with ZIF Socket 5 processors. The CPU that came with the motherboard should
have a fan attached to it to prevent overheating. If this is not the case then purchase
a fan before you turn on your system. Apply thermal jelly to the CPU top and then
install the fan onto the CPU.

WARNING: Without a fan circulating air on the CPU and heat sinks, the
CPU and/or heat sinks can overheat and cause damage to both the CPU and the
motherboard. (See "CPU Cooling Fan Connector” at the end of this section.)

To install a CPU, first turn off your system and remove its cover. Locate the ZIF
socket and open it by first pulling the lever sideways away from the socket then
upwards to a 90-degree right angle. Insert the CPU with the correct orientation as
shown. Use the notched corner of the CPU with the white dot as your guide. The
white dot should point towards the end the of the lever . Notice that there is a blank
area where one hole is missing from that corner of the square array of pin holes and
a "1" printed on the motherboard next to that corner . Because the CPU has a corner
pin for three of the four corners, the CPU will only fit in the one orientation as
shown. The picture is for reference only; you should have a CPU fan that will cover
the face of the CPU. With the added weight of the CPU fan, no force is required to
insert the CPU. Once completely inserted, hold down on the fan and close the
socket's lever .

(CPU)

III. INSTALLATION

IMPORTANT: You must set jumpers for "CPU to BUS Frequency Ratio" and
jumpers for "BUS Frequency Selection" depending on the CPU that you install.

Lever
Lock

R

Blank

Installed CPU
Example

ZIF Socket 7 with
Pentium Processor

White Dot

ASUS HX97 User’s Manual 19

4. Expansion Cards

WARNING: Make sure that you unplug your power supply when adding or
removing expansion cards or other system components. Failure to do so may
cause severe damage to both your motherboard and expansion cards.

First read your expansion card documentation on any hardware and
software settings that may be required to setup your specific card.

III. INSTALLATION

(Expansion Cards)

Expansion Card Installation Procedure:

III. INSTALLATION

1. Read the documentation for your expansion card.

2. Set any necessary jumpers on your expansion card.

3. Remove your computer system's cover.

4. Remove the bracket on the slot you intend to use.
Keep the bracket for possible future use.

5. Carefully align the card’s connectors and press firmly.

6. Secure the card on the slot with the screw you removed in step 4.

7. Replace the computer system's cover.

8. Setup the BIOS if necessary
(such as "IRQ xx Used By ISA: Yes" in PNP AND PCI SETUP)

9. Install the necessary software drivers for your expansion card.

Assigning IRQs for Expansion Cards

Some expansion cards need to use an IRQ to operate. Generally an IRQ must be
exclusively assigned to one use. In an standard design there are 16 IRQs available
but most of them are already in use by parts of the system which leaves 6 free for
expansion cards.

20 ASUS HX97 User’s Manual