Asus Pentium TX97-X User manual

R
TX97-X
Pentium®ATX Motherboard
USER’S MANUAL

ASUS TX97-X User’s Manual
2
USER’S NOTICE
Product Name: ASUS TX97-X
Manual Revision: 3.00
Release Date: August 1997
No part of this manual, including the products and softwares described in it, may be repro-
duced, transmitted, transcribed, stored in a retrieval system, or translated into any language
in any form or by any means, except documentation kept by the purchaser for backup pur-
poses, without the express written permission of ASUSTeK COMPUTER INC. (“ASUS”).
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOTLIMITED TOTHE IMPLIED
WARRANTIES OR CONDITIONS OF MERCHANTABILITYOR FITNESS FORAPAR-
TICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS,
EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDEN-
TAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF
PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSI-
NESS AND THE LIKE), EVEN IF ASUS HAS BEENADVISED OF THE POSSIBILITY
OF SUCH DAMAGESARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL
OR PRODUCT.
Products and corporate names appearing in this manual may or may not be registered trade-
marks or copyrights of their respective companies, and are used only for identification or
explanation and to the owners’ benefit, without intent to infringe.
• Intel, LANDesk, and Pentium are registered trademarks of Intel Corporation.
• IBM and OS/2 are registered trademarks of International Business Machines.
• Symbios is a registered trademark of Symbios Logic Corporation.
• Windows and MS-DOS are registered trademarks of Microsoft Corporation.
• Sound Blaster AWE32 and SB16 are trademarks of Creative Technology Ltd.
• Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.
The product name and revision number are both printed on the board itself. Manual revisions
are released for each board design represented by the digit before and after the period of the
manual revision number. Manual updates are represented by the third digit in the manual
revision number.
For previous or updated manuals, BIOS, drivers, or product release information, contactASUS
at http://www.asus.com.tw or through any of the means indicated on the following page.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUALARE FUR-
NISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT
ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COM-
MITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBLITY OR LIABILITY FOR
ANYERRORSOR INACCURACIESTHATMAYAPPEARINTHIS MANUAL, INCLUD-
ING THE PRODUCTS AND SOFTWARES DESCRIBED IN IT.
Copyright © 1997 ASUSTeK COMPUTER INC.All Rights Reserved.

ASUS TX97-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: [phone]
Email: [email protected]
WWW: www.asus.com.tw
Gopher: gopher.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER INTERNATIONAL
Marketing Info
Address: 721 Charcot Avenue, San Jose, CA 95131, USA
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support
BBS: [phone]
Email: [email protected]
WWW: www.asus.com
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]
Hotline: [phone]

ASUS TX97-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 TX97-X Motherboard ..................................8
Introduction to ASUS TX97 Series of Motherboards ................9
Parts of the ASUS TX97-X Motherboard ................................ 11
III. INSTALLATION ........................................................................12
ASUS TX97-X Motherboard Layout ............................................12
Installation Steps............................................................................14
1. Jumpers ......................................................................................14
Jumper Settings ..................................................................15
Compatible Cyrix CPU Identification ................................19
2. System Memory (DIMM) .........................................................19
DIMM Memory Installation Procedures: ...........................20
3. Central Processing Unit (CPU).................................................22
4. Expansion Cards .......................................................................23
Expansion Card Installation Procedure: .............................23
Assigning IRQs for Expansion Cards.................................23
Assigning DMA Channels for ISA Cards...........................24
ISA Cards and Hardware Monitor ......................................24
5. External Connectors..................................................................25
Power Connection Procedures .................................................33
IV. BIOS SOFTWARE .....................................................................34
Support Software ...........................................................................34
Flash Memory Writer Utility....................................................34
Main Menu .........................................................................35
Advanced Features Menu ...................................................35
Managing and Updating Your Motherboard’s BIOS................36
6. BIOS Setup ...............................................................................37
Load Defaults .....................................................................38
Standard CMOS Setup .............................................................38
Details of Standard CMOS Setup:......................................38
BIOS Features Setup ................................................................41
Details of BIOS Features Setup..........................................41
Chipset Features Setup .............................................................44
Details of Chipset Features Setup.......................................44
Power Management Setup........................................................47
Details of Power Management Setup .................................47

ASUS TX97-X User’s Manual 5
CONTENTS
PNP and PCI Setup ..................................................................50
Details of PNP and PCI Setup ............................................50
Load BIOS Defaults .................................................................52
Load Setup Defaults .................................................................52
Supervisor Password and User Password ................................53
IDE HDD Auto Detection ........................................................54
Save & Exit Setup ....................................................................55
Exit Without Saving .................................................................55
V. SUPPORT SOFTWARE..............................................................56
ASUS TX97 Motherboard Series Support CD ..............................56
LANDesk Client Manager (LDCM)..............................................56
Desktop Management Interface (DMI)..........................................58
Introducing the ASUS DMI Configuration Utility .............58
System Requirements .........................................................58
Using the ASUS DMI Configuration Utility ......................59
VI. ASUS PCI SCSI Cards ..............................................................61
Symbios SCSI BIOS and Drivers ..................................................61
ASUS PCI-SC200 & PCI-SC860 SCSI Cards ..............................61
Setting Up the ASUS PCI-SC200 & PCI-SC860.....................62
Setting the INTAssignment for the ASUS PCI-SC200 ...........62
Terminator Requirements for SCSI Devices ............................62
Terminator Settings for the ASUS PCI-SC860 ........................63
Terminator Settings for the ASUS PCI-SC200 ........................63
SCSI ID Numbers for SCSI Devices .......................................64
SCSI ID Priority .......................................................................64
16-bitAudio (Section included with optional onboard audio).......65
ASUS Installation CD ..............................................................67
ASUS Audio Driver CD Contents ......................................67
Audio Drivers Installation ................................................................67
Win95 Audio Drivers.........................................................................68
Win3.x Audio Drivers........................................................................69
Configuration Manager ............................................................69
Creative PnP Configuration Manager (CTCM) .......................69
Audio Software ........................................................................71
Environment Variables .............................................................75
SOUND Environment variable...........................................75
BLASTER Environment Variable ......................................75
MIDI Environment Variable...............................................76
Maximum Recording Rates for the Audio Hardware.........76

ASUS TX97-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 for connection of the monitor to the
graphics card is required to assure compliance with FCC regulations. Changes
or modifications to this unit not expressly approved by the party responsible for
compliance could void the user’s authority to operate this equipment.
CanadianDepartment of 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 Cana-
dian Department of Communications.

ASUS TX97-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 Software Instructions on setting up the BIOS software
V. Support Software Information on the included support software
VI. ASUS SCSI Cards Installation of ASUS SCSI cards (optional)
Item Checklist
Please check that your package is complete. If you discover damaged or missing
items, please contact your retailer.
þASUS TX97-X motherboard
þ1 IDE ribbon cable
þ1 floppy ribbon cable
þSupport Drivers & Utilities
• Flash Memory Writer utility to update the FLASH BIOS
• Desktop Management Interface (DMI) utility
• LANDesk
®
Client Manager (LDCM) Software (with optionalonboardLM78)
• Readme files for descriptions and use of the files
• Technical Support Form
þThis user’s manual
¨Infrared module (optional)
¨ASUS PCI-SC200 Fast-SCSI or PCI-SC860 Ultra-Fast SCSI card (optional)
¨ASUS audio onboard and audio driver CD with online help (optional)
I. INTRODUCTION
I. INTRODUCTION
(Manual / Checklist)

8 ASUS TX97-X User’s Manual
Features of the ASUS TX97-X Motherboard
The ASUS TX97-X is carefully designed for the demanding PC user who wants
many features in a small package. This motherboard:
•Intel Chipset: Features Intel’s 430TX PCIset with I/O subsystems.
•VersatileProcessorSupport: IntelPentium
®
75-233MHz (P55C-MMX
™
,P54C/
P54CS), IBM
®
/Cyrix
®
6x86-PR166+ (Rev 2.7 or later), IBM
®
/Cyrix
®
6x86MX
™
(PR166 & faster), AMD-K5
™
(PR75-PR133), AMD-K6
™
(PR166 & faster).
•Versatile Memory Support: Is equipped with three DIMM sockets to support
(8, 16, 32, 64, or 128MB) 168-pin SDRAM memory modules up to 256MB.
•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: Provides expansion for three 16-bit ISA cards, three
32-bit PCI cards, and 1 shared expansion for either a PCI or an ISA card.
•Super Multi-I/O: Provides two high-speed UART-compatible serial ports and
one parallel port with EPP and ECP capabilities.
• 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, supports PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2, and
supports Enhanced IDE devices such as Tape Backup and CD-ROM drives.
Supports two drives of either 5.25-inch (360KB or 1.2MB) or 3.5-inch (720KB,
1.44MB, or 2.88MB) disk drives. Supports Japanese “Floppy 3 mode” (3.5-
inch disk drive: 1.2MB) and LS-120 floppy disk drives (3.5-inch disk drive: 120
MB, 1.44MB, 720K). BIOS supports IDE CD-ROM or SCSI device boot-up.
•Level 2 Cache: 512KB Pipelined Burst SRAM onboard.
•Optional IrDA: Supports and optional IrDA receiver/transmitter device.
•Symbios SCSI BIOS: Has onboard firmware to support optional ASUS SCSI
controller cards.
•Optional Audio: Has optional onboard Creative Labs
®
Audio with 3D sound.
II. FEATURES
(Features)
II. FEATURES

ASUS TX97-X User’s Manual 9
II. FEATURES
II. FEATURES
(TX97 Series)
Introduction to ASUS TX97 Series of Motherboards
Performance
• SDRAM Optimized Performance - ASUS TX97 series of motherboards sup-
port the new generation memory - Synchronous Dynamic Random Access
Memory (SDRAM) which increases the data transfer rate from 264MB/s max
using EDO memory to 528MB/s max using SDRAM.
• Double the IDE Transfer Speed - ASUS TX97 series of motherboards with
Intel 430TX PCIset improves IDE transfer rate using Bus Master UltraDMA/33
IDE which can handle data transfer up to 33MB/s. The best of all is that this
new technology is compatible with existing ATA-2 IDE specs so there is no
need to upgrade current hard drives or cables.
•ConcurrentPCI-Concurrent PCI allows multiple PCI transfers from PCI master
busses to memory to CPU.
• ACPI Ready - ACPI (Advanced Configuration and Power Interface) is also
implemented on all ASUS 430TX series of motherboards. ACPI provide more
Energy Saving Features for the future operating systems (OS) supporting OS
Direct Power Management (OSPM) functionality. With these features imple-
mented in the OS, PCs can be ready around the clock everyday, yet satisfy all
the energy saving standards. To fully utilize the benefits of ACPI, an ACPI-
supported OS such as in the next release of Windows 95 must be used.
• PC ’97 Compliant - Both the BIOS and hardware levels ofASUS TX97 series
of motherboards meet PC ’97 compliancy. The new PC 97 requirements for
systems and components are based on the following high-level goals: Support
for Plug and Play compatibility and power management for configuring and
managing all system components, and 32-bit device drivers and installation pro-
cedures for both Windows 95 and Windows NT.

10 ASUS TX97-X User’s Manual
II. FEATURES
(TX97 Series)
II. FEATURES
•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.
• SystemResourcesAlert -Today’s operating systems such asWindows 95, Win-
dows NT, and OS/2, require much more memory and hard drive space to present
enormous user interfaces and run large applications. The system resource moni-
tor will warn the user before the system resources are used up to prevent pos-
sible application crashes. Suggestions will give the user information on manag-
ing their limited resources more efficiently.
• Virus Write Protection - Normally, viruses can destroy data on storage media
such as hard drivers, floppy diskettes, and MO. Some new-generation viruses
will not only destroy data on storage media, but also clear BIOS data which is
usually unprotected. ASUS TX97 series of motherboards were designed to co-
operate with BIOS, chipset, and flash EPROM to disable write permission when
the system’s initialization stage is completed upon boot-up.
• CPU Slow Down - When CPU fans or system fans are malfunctioning, the
system will deactivate the CPU Clock line to decrease CPU utilization to the
speed upon detection of system overheat. This will prevent CPU damage from
system overheat. The CPU utilization will restore normal operations when tem-
perature falls below a safe level.
• Auto Fan Off - The system fans will power off automatically even in sleep
mode. This function reduces both energy consumption and system noise, and
is a important feature to implement silent PC systems.
• Dual Function Power Button (requiresATX powersupply) - The system can
be in one of two states, one is Sleep mode and the other is the Soft-Off mode.
Pushing the power button for less than 4 seconds places the system into Sleep
mode. When the power button is pressed for more than 4 seconds, it enters the
Soft-Off mode.
• Remote Ring On (requiresATX powersupply) - This allows a computer to be
turned on remotely through a modem. With this benefit on-hand, any user can
access vital information from their computer from anywhere in the world!
• Message LED - Chassis LEDs now act as information providers. Through the
way a particular LED illuminates, the user can determine the stage the computer
is in. A simple glimpse provides useful information to the user.

ASUS TX97-X User’s Manual 11
Parts of the ASUS TX97-X Motherboard
II. FEATURES
II. FEATURES
(Motherboard Parts)
Intel’s 430TX
PCIset
512KB Pipelined
Burst L2 Cache
CPU ZIF
Socket 7
3 PCI Slots
3ISA Slots
2 DIMM
Sockets
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
LM78 Hardware
Monitor (optional)
CPU Thermal
Sensor (optional)
Creative Labs
Audio (optional)
1PCI/ISA
shared Slot

12 ASUS TX97-X User’s Manual
III. INSTALLATION
ASUS TX97-X Motherboard Layout
FS0
FS1
FS2
BUS FREQ
NOTE: The items in outline are optional and may not be present.
BF0
BF1
BF2
BUS Freq.
Game/Midi Port
Mic In Line
In Line
Out
Parallel Port
COM 2 COM 1
Panel Connections
Board Power Input
for ATX Power Supply
Floppy Drives
ISA Slot 3
ISA Slot 2
ISA Slot 1
PCI Slot 1
ISA Slot 4
PCI Slot 2
PCI Slot 4
Secondary IDE Primary IDE
PCI Slot 3
512KB Onboard L2 Cache
CPU ZIF Socket 7
R
IDE LED
Infrared Con. (IrDA)
Multi-I/O (En/Dis)
SIO
Creative
®
Modem
Connector
CR2032
3 Volt
Lithium Cell
Top: USB 1
Bottom: USB 2
USB
PS/2
Top: Mouse
Bottom: Keyboard
Volume Control
VOLCTL
AUDIO (Dis/En)
Keyboard BIOS
Programmable
BIOS EEPROM
RTC (Test/Clear)
RTCLR
Sony CD In
Intel
430TX
PCIset
Intel PIIX4
PCIset
FANPWR1
FANPWR3
Row
Creative
®
Labs
Audio
DIMM Socket 1 (64-bit, 168-pin module)
10
32
DIMM Socket 2 (64-bit, 168-pin module)
54
DIMM Socket 3 (64-bit, 168-pin module)
VID0
VID1
VID2
CPU Voltage
VID3
Chasis open
alarm lead
CPU Fan
LM78
Hardware Monitor
CPU Thermal Sensor
(Hardware Monitor)
LM75
Wake on LAN
(Motherboard Layout)
III. INSTALLATION

ASUS TX97-X User’s Manual 13
III. INSTALLATION
Jumpers
1) RTCLR p. 15 Real Time Clock RAM (Operation/Clear Data)
2) AUDIO (optional) p. 15 Onboard Audio (Disable/Enable)
3) M/IO p. 16 Multi-I/O Selection (Enable/Disable)
4) FS0, FS1, FS2 p. 16 CPU External Clock (BUS) Frequency Selection
5) BF0, BF1, BF2 p. 16 CPU:BUS Frequency Ratio
6) VID0, 1, 2, 3 p. 18 CPU Voltage Regulator Output Selection
Expansion Slots
1) System Memory p. 19 System Memory Upgrade
2) CPU ZIF Socket 7 p. 22 Central Processing Unit (CPU) Socket
3) SLOT 1, 2, 3, 4 p. 23 16-bit ISA Bus Expansion Slots
*
4) PCI 1, 2,3, 4 p. 23 32-bit PCI Bus Expansion Slots
†
Connectors
1) PS2KEYBOARD p. 25 PS/2 Keyboard Connector (6-pin Female)
2) PS2MOUSE p. 25 PS/2 Mouse Connector (6-pin Female)
3) PRINTER p. 26 Parallel (Printer) Port Connector (25-pin Female)
4) COM1, COM2 p. 26 Serial Port COM1 & COM2 (Two 9-pin Female)
5) FLOPPY p. 26 Floppy Drive Connector (34-pin Block)
6) AUDIO (optional) p. 27 Audio Port -Line Out, Line In, Mic (Three 1/8” Female)
7) GAME (optional) p. 27 Joystick/Midi Connector (15-pin Female)
8) USB p. 27 Universal Serial BUS Ports 1 & 2 (Two 4-pin Female)
9) Primary / Second IDE p. 28 Primary / Secondary IDE Connector (40-pin Blocks)
10) IDELED p. 28 IDE LED Activity Light
11) FANPWR1, 2, 3 p. 29 1Chassis,2CPU,3PowerSupplyFanPowerLead(3-pinBlock)
12) CHASSIS p. 29 Chassis Open Alarm Lead (4-1pin Block)
13) IR p. 30 Infrared Port Module Connector
14) ATXPWR p. 30 ATX Motherboard Power Connector (20-pin Block)
15) VOLCTL (optional) p. 31 Digital Volume Level Control (Up/Down)
16) WOL p. 31 Wake on LAN (3 pins) (RESERVED)
17) MSG LED (PANEL) p. 32 System Message LED (2 pins)
18) SMI (PANEL) p. 32 SMI Switch Lead (2 pins)
19) PWR SW (PANEL) p. 32 ATX Power & Soft-Off Switch Lead (2 pins)
20) RESET (PANEL) p. 32 Reset Switch Lead (2 pins)
21) PWR LED ( PANEL ) p. 32 System Power LED Lead (3 pins)
22) KEYLOCK ( PANEL ) p. 32 Keyboard Lock Switch Lead (2 pins)
23) SPEAKER (PANEL) p. 32 Speaker Output Connector (4 pins)
*
The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not
use this address or else conflicts will occur.
(Map of Board)
III. INSTALLATION

14 ASUS TX97-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 System Memory
3. Install the Central Processing Unit (CPU)
4. Install Expansion Cards
5. Connect Ribbon Cables, Cabinet Wires, and Power Supply
6. Setup the BIOS Software
1. Jumpers
Several hardware settings are made through the use of jumper caps to connect jumper
pins (JP) on the motherboard. See “Motherboard Layout” 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 moth-
erboards 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 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 jump-
ers 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, baseboards and components,such as SCSI
cards, contain very delicate Integrated Circuit (IC) chips. To protect them against
damage from static electricity, you should follow some precautions whenever you
work on your computer.
1. Unplug your computer when working on the inside.
2. Use a grounded wrist strap before handling computer components. If you do
not have one, touch both of your hands to a safely grounded object or to a
metal object, such as the power supply case.
3. Hold components by the edges and try not to touch the IC chips, leads or
connectors, or other components.
4. Place components on a grounded antistatic pad or on the bag that came with
the component whenever the components are separated from the system.

ASUS TX97-X User’s Manual 15
III. INSTALLATION
III. INSTALLATION
(Jumpers)
1. 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 and remove theAC power , (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.
Battery Test Jumper (RTCLR)
You can test the battery’s current by removing this jumper and attaching a cur-
rent meter to pins 1&2. 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 [1-2] (Default)
Clear Data [2-3] (momentarily)
RTC RAM (Operation / Clear Data)
Operation (Default)
RTCLR
Clear Data
RTCLR
Battery Test
R
2. 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 [2-3] (Default)
Disabled [1-2]
Onboard Audio (Disable / Enable)
Enable
(Default)
1
2
3
AUDIO
Disable
1
2
3
AUDIO
R
Jumper Settings

16 ASUS TX97-X User’s Manual
III. INSTALLATION
(Jumpers)
III. INSTALLATION
3. Onboard Multi-I/O Selection (M/IO)
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 M/IO
Enable [1-2] (Default)
Disable [2-3]
Multi I/O Setting (Enable / Disable)
Disabled
1
2
3
M/IO
Enable (Default)
1
2
3
M/IO
R
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
timestheBUSRatioequalstheCPU’sInternalfrequency(the advertisedCPUspeed).
5. CPU to BUS Frequency Ratio (BF0, BF1, BF2)
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.
CPU External Clock (BUS) Frequency Selection
CPU : BUS Frequency Ratio
R
50MHz
FS1
1
2
3
FS0 FS2
55MHz
FS1
FS0
FS2
1
2
360MHz
FS1
FS0
FS2
1
2
366MHz
FS1
FS0
FS2
1
2
375MHz
FS1
FS0
FS2
1
2
3
3.0x(3/1)
3.0x(3/1)
----
----
----
1
2
3
BF1
BF0
BF2
2.5x(5/2)
2.5x(5/2)
1.0x(1/1)
2.0x(2/1)
----
1
2
3
BF1
BF0
BF2
2.0x(2/1)
2.0x(2/1)
2.0x(2/1)
2.0x(2/1)
----
1
2
3
BF1
BF0
BF2
1.5x(3/2)
3.5x(7/2)
3.0x(3/1)
3.0x(3/1)
----
1
2
3
BF1
BF0
BF2
----
----
----
----
4.0x(4/1)
1
2
3
BF1
BF0
BF2
----
----
----
----
4.5x(9/2)
1
2
3
BF1
BF0
BF2
P54C/K5
P55C/K6/MX
IBM/Cyrix 6x86
IBM/Cyrix 6x86L
AMD-K6 (.25µ)
Complete Names:
Intel Pentium P54C
Pentium P55C-MMX
AMD K5, K6
IBM/Cyrix 6x86(L) (M1)
IBM/Cyrix 6x86MX(M2)

ASUS TX97-X User’s Manual 17
III. INSTALLATION
(Jumpers)
III. INSTALLATION
Set the jumpers by the Internal speed of the Intel, AMD, IBM, or Cyrix CPU as follows:
(BUS Freq.) (Freq. Ratio)
CPU Model Freq. Ratio BUS Freq. FS2 FS1 FS0 BF2 BF1 BF0
Intel Pentium 233MHz 3.5x 66MHz [2-3] [2-3] [1-2] [----] [1-2] [1-2]
Intel Pentium 200MHz 3.0x 66MHz [2-3] [2-3] [1-2] [----] [2-3] [1-2]
Intel Pentium 166MHz 2.5x 66MHz [2-3] [2-3] [1-2] [----] [2-3] [2-3]
Intel Pentium 150MHz 2.5x 60MHz [2-3] [2-3] [2-3] [----] [2-3] [2-3]
Intel Pentium 133MHz 2.0x 66MHz [2-3] [2-3] [1-2] [----] [1-2] [2-3]
Intel Pentium 120MHz 2.0x 60MHz [2-3] [2-3] [2-3] [----] [1-2] [2-3]
Intel Pentium 100MHz 1.5x 66MHz [2-3] [2-3] [1-2] [----] [1-2] [1-2]
Intel Pentium 90MHz 1.5x 60MHz [2-3] [2-3] [2-3] [----] [1-2] [1-2]
Intel Pentium 75MHz 1.5x 50MHz [2-3] [1-2] [2-3] [----] [1-2] [1-2]
AMD-K6-PR233 233MHz 3.5x 66MHz [2-3] [2-3] [1-2] [----] [1-2] [1-2]
AMD-K6-PR200 200MHz 3.0x 66MHz [2-3] [2-3] [1-2] [----] [2-3] [1-2]
AMD-K6-PR166 166MHz 2.5x 66MHz [2-3] [2-3] [1-2] [----] [2-3] [2-3]
AMD-K5-PR133 100MHz 1.5x 66MHz [2-3] [2-3] [1-2] [----] [1-2] [1-2]
AMD-K5-PR120 90MHz 1.5x 60MHz [2-3] [2-3] [2-3] [----] [1-2] [1-2]
AMD-K5-PR100 100MHz 1.5x 66MHz [2-3] [2-3] [1-2] [----] [1-2] [1-2]
AMD-K5-PR90 90MHz 1.5x 60MHz [2-3] [2-3] [2-3] [----] [1-2] [1-2]
AMD-K5-PR75 75MHz 1.5x 50MHz [2-3] [1-2] [2-3] [----] [1-2] [1-2]
IBM/Cyrix6x86MX-PR233 200MHz 3.0x 66MHz [2-3] [2-3] [1-2] [----] [2-3] [1-2]
IBM/Cyrix6x86MX-PR200 166MHz 2.5x 66MHz [2-3] [2-3] [1-2] [----] [2-3] [2-3]
IBM/Cyrix6x86MX-PR166 150MHz 2.5x 60MHz [2-3] [2-3] [2-3] [----] [2-3] [2-3]
*IBM/Cyrix 6x86-PR166+ 133MHz 2.0x 66MHz [2-3] [2-3] [1-2] [----] [1-2] [2-3]
*NOTE: The only IBM or Cyrix 6x86 (M1) Rev 2.7 or later is supported on this motherboard (see
next page). Bootup screen will show 6x86-P166+ with the Cyrix PR166+ installed on this mother-
board.
WARNING! Frequencies above 66MHz exceed the specifications for the on-
board Intel Chipset and are not guaranteed to be stable.

18 ASUS TX97-X User’s Manual
III. INSTALLATION
(Jumpers)
III. INSTALLATION
Compatible Cyrix CPU Identification
The only Cyrix CPU that is supported on this motherboard is
labeledCyrix 6x86 PR166+ but mustbe Revision 2.7 orlater.
Look on the underside of the CPU for the serial number. The
number should read G8DC6620A or later.
5. Voltage Regulator Output Selection (VID0, 1, 2, 3)
These jumpers set the voltage supplied to the CPU. VID1 for 3.4V(STD) is
ignored, therefore, the jumper setting for 2.8V(Dual) may work for both
3.4V(STD) and 2.8V(Dual).
Intel Pentium (P54C)
(75MHz-200MHz)
Pentium MMX (P55C)
(150MHz-233MHz) AMD-K6 (PR166 and faster) AMD-K5 (PR75-PR133) IBM/Cyrix 6x86(MX) (PR166 and faster) IBM/Cyrix 6x86(M1) (PR166 and faster)
WARNING! Because CPU designs change rapidly, the following chart is only
intended as a simple quideline and is not intended to be true for your CPU. Look
for the CPU voltage included with your CPU and follow the Voltage setting
diagramed below the chart.
Manufacturer CPU Type Single Plane Dual Plane VID3 VID2 VID1 VID0
Intel/AMD/IBM/Cyrix P54C/CS/K5/M1 3.5V(VRE) ---- [----] [2-3] [----] [1-2]
AMD/IBM/Cyrix K6-166,200/MX ---- 2.9V(Dual) [----] [2-3] [2-3] [1-2]
Intel/AMD P54C/CS/K5 3.4V(STD) ---- [----] [2-3] [2-3] [2-3]
Intel P55C ---- 2.8V(Dual) [----] [2-3] [2-3] [2-3]
AMD K6-PR233 ---- 3.2V(Dual) [----] [1-2] [2-3] [2-3]
AMD (.25micron) K6-233,266,300 ---- 2.1V(Dual) [----] [----] [2-3] [1-2]
1
2
3
1
2
3
1
2
3
2.9 Volts2.8 Volts2.7 Volts 1
2
3
1
2
3
1
2
3
3.5 Volts3.4 V
3.2 Volts
*
*3.4V VID1 may be [----] or [2-3]
Voltage Regulator Output Selection
R
VID1
VID0
VID2
1
2
3
VID3
2.5 Volts
VID1
VID0
VID2
1
2
3
VID3
2.1 Volts
1.8 Volts
VID1
VID0
VID2
1
2
3
VID3 VID1
VID0
VID2
1
2
3
VID3
1.9 Volts

ASUS TX97-X User’s Manual 19
III. INSTALLATION
(System Memory)
III. INSTALLATION
2. System Memory (DIMM)
Only Dual Inline Memory Modules (DIMM’s) can be used with this motherboard.
Twosockets are available for3.3Volt(power level)UnbufferedSynchronousDRAMs
(SDRAM) or EDO DRAM of either 8, 16, 32, 64, or 128MB to form a memory size
between 8MB to 256MB. One side (with memory chips) of the DIMM module
takes up one Row on the motherboard.
IMPORTANT: Memory speed setup is required through "Auto Configura-
tion" in BIOS Chipset Setup of the BIOS SOFTWARE.
Install memory in any combination as follows:
DIMM Type 168-pin DIMM Memory Modules Total Memory
Socket 1 SDRAM 8MB, 16MB, 32MB x1
(Rows 0&1) SDRAM 64MB, 128MB - but
(Socket 3 must be empty)
EDO 8, 16, 32, 64, 128MB
Socket 2 SDRAM 8MB, 16MB, 32MB x1
(Rows 2&3) SDRAM 64MB, 128MB - but
(Socket 3 must be empty)
EDO 8, 16, 32, 64, 128MB
Socket 3 SDRAM 8MB, 16MB, 32MB - but
(Rows 4&5) Socket 1 or 2 must not have x1
64MB or 128MB SDRAM
EDO 8, 16, 32, 64, 128MB
Total System Memory (Max 256MB) =
NOTE:
• Maximum memory size is 256MB total for this motherboard.
• Socket 3 will not support 64MB or 128MB DIMMs with 64Mbit SDRAM cells.
• If Socket 1 and/or Socket 2 has 64MB or 128MB DIMM’s with 64Mbit SDRAM
cells, Socket 3 must be empty.

20 ASUS TX97-X User’s Manual
III. INSTALLATION
(System Memory)
III. INSTALLATION
DIMM Memory Installation Procedures:
Insert the module(s) as shown. Because the number of pins are different on either
side of the breaks, the module will only fit in the orientation as shown. DRAM
SIMM modules have the same pin contact on both sides. SDRAM DIMM modules
have different pint contact on each side and therefore have a higher pin density.
168 Pin DIMM Memory Sockets
88 Pins 60 Pins 20 Pins
Lock
R
The Dual Inline Memory Module (DIMM) memory modules must be 3.3Volt Un-
buffered Synchronous DRAM (SDRAM) or Extended Data Output (EDO) . You
can identify the type of DIMM module by the illustration below:
168-Pin DIMM Notch Key Definitions (3.3V)
DRAM Key Position Voltage Key Position
Unbuffered
RFU
Buffered Reserved
3.3V
5.0V
The notch on the DIMM module will shift between left, center, or right to identify
the type and also to prevent the wrong type to be inserted into the DIMM slot on the
motherboard. You must ask your retailer for the specifications before purchasing.
Four clock signals are supported on this motherboard.