Asus P2B98-XV User manual

R
P2B98-XV
Pentium®II ATX Motherboard
USER’S MANUAL

ASUS P2B98-XV User’s Manual
2
USER'S NOTICE
Product Name: ASUS P2B98-XV
Manual Revision: 2.00
Release Date: August 1998
No part of this manual, including the products and software described in it, may be repro-
duced, transmitted, transcribed, stored in a retrieval system, or translated into any language
in any form or by any means, except documentation kept by the purchaser for backup
purposes, without the express written permission of ASUSTeK COMPUTER INC.
(“ASUS”).
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OFANY KIND,
EITHEREXPRESS ORIMPLIED, INCLUDINGBUTNOTLIMITEDTOTHE IMPLIED
WARRANTIESOR CONDITIONSOF MERCHANTABILITYORFITNESS 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-
NESSANDTHE LIKE), EVEN IFASUS HAS BEENADVISED OFTHE POSSIBILITY
OF SUCH DAMAGESARISING FROMANYDEFECT OR ERROR INTHIS MANUAL
OR PRODUCT.
Product warranty or service will not be extended if: (1) the product is repaired, modified or
altered, unless such repair, modification of alteration is authorized in writing byASUS; or
(2) the serial number of the product is defaced or missing.
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 product itself. Manual revi-
sions are released for each product 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.
Forpreviousor updated manuals,BIOS,drivers, or productreleaseinformation,contactASUS
at http://www.asus.com.tw or through any of the means indicated on the following page.
SPECIFICATIONSAND 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 BYASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR
ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL, IN-
CLUDING THE PRODUCTSAND SOFTWARE DESCRIBED IN IT.
Copyright © 1998 ASUSTeK COMPUTER INC. All Rights Reserved.

ASUS P2B98-XV User’s Manual 3
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC.
Marketing
Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support
Fax: [phone]
BBS: [phone]
Email: [email protected]
WWW: www.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER INTERNATIONAL
Marketing
Address: 6737 Mowry Avenue, Mowry Business Center, Building 2
Newark, CA 94560, USA
Fax: [phone]
Email: [email protected]
Technical Support
Fax: [phone]
BBS: [phone]
Email: [email protected]
WWW: www.asus.com
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER GmbH
Marketing
Address: Harkort Str. 25, 40880 Ratingen, BRD, Germany
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support
Hotline: [phone]
BBS: 49-2102-448690
Email: [email protected]
WWW: www.asuscom.de
FTP: ftp.asuscom.de/pub/ASUSCOM

ASUS P2B98-XV User’s Manual
4
CONTENTS
I. INTRODUCTION 7
How this Manual is Organized ........................................................... 7
Item Checklist ..................................................................................... 7
How this Manual is Organized ........................................................... 7
Item Checklist ..................................................................................... 7
II. FEATURES 8
Features of the ASUS P2B98-XV Motherboard ................................. 8
The ASUS P2B98-XV Motherboard............................................. 9
III. INSTALLATION 10
Layout of the ASUS P2B98-XV Motherboard ................................. 10
Installation Steps............................................................................... 12
1. Jumpers ......................................................................................... 13
2. System Memory (DIMM) ............................................................. 16
DIMM Memory Installation Procedures ............................... 17
3. Central Processing Unit (CPU)................................................... 18
Pentium II Processor.............................................................. 18
AAVID Heatsink ................................................................... 19
Elan Vital Heatsink................................................................ 19
4. Expansion Cards ........................................................................... 23
Expansion Card Installation Procedure ................................. 23
Assigning IRQs for Expansion Cards.................................... 23
Assigning DMA Channels for ISA Cards.............................. 24
5. External Connectors..................................................................... 24
Power Connection Procedures .................................................... 31
IV. BIOS SOFTWARE 32
Flash Memory Writer Utility ............................................................ 32
Main Menu .................................................................................. 32
Managing and Updating Your Motherboard’s BIOS................... 34
6. BIOS Setup .................................................................................. 35
Load Defaults ........................................................................ 36
Standard CMOS Setup ................................................................ 36
Details of Standard CMOS Setup:......................................... 36
BIOS Features Setup ................................................................... 39
Details of BIOS Features Setup............................................. 39
Chipset Features Setup ................................................................ 42
Details of Chipset Features Setup.......................................... 42
Power Management Setup........................................................... 45
Details of Power Management Setup .................................... 45

ASUS P2B98-XV User’s Manual 5
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 & Exit Setup ....................................................................... 53
Exit Without Saving .................................................................... 53
CONTENTS
V. Support CD 55
Support CD Main Menu ................................................................... 57
A. Video Driver................................................................................ 58
B. Other Video Drivers .................................................................... 65
C. Video Player ................................................................................ 79
D. DMI Configuration Utility .......................................................... 81
VI.ASUS LAN Card 85

ASUS P2B98-XV User’s Manual
6
FCC & DOC COMPLIANCE
FederalCommunications CommissionStatement
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 ofCommunications 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 P2B98-XV User’s Manual 7
I. INTRODUCTION
I. INTRODUCTION
Manual / Checklist
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 CD: Information on the included support software
VI. ASUS LAN Card: Installation of the ASUS LAN card (optional)
Item Checklist
Check that your package is complete. If you discover damaged or missing items,
contact your retailer.
(1) ASUS Motherboard
(1) Retention mechanism & heatsink support for CPU
(1) 9pin male serial external connector set
(1) IDE ribbon cable for master and slave drives
(1) Floppy ribbon cable for (1) 5.25inch floppy and (2) 3.5inch floppies
(1) Bag of spare jumpers
(1) Support drivers and utilities:
(1) User’s Manual
ASUS PCI-L101 Wake-on-LAN 10/100 Ethernet Card (optional)

8ASUS P2B98-XV User’s Manual
Features of the ASUS P2B98-XV Motherboard
The ASUS P2B98-XV is carefully designed for the discriminating PC user who
wants smart features processed by the fastest CPU.
•Versatile Processor Support: Intel Pentium
®
II (233MHz–450MHz) processor.
•IntelAGPset:FeaturesIntel’s440BXAGPsetwithI/Osubsystemsandfront-sidebus
(FSB) platform, which boosts the traditional 66-MHz internal bus speed to 100MHz.
•Multi-Cache: Supports a Pentium
®
II processor with either 512KB, 128KB, or
0KB Pipelined Burst Level 2 cache in the Single Edge Contact (SEC) cartridge.
•PC100 Memory Support: Equipped with three DIMM sockets to support (8,
16, 32, 64, 128, or 256MB) 168-pin SDRAM memory modules up to 768MB.
•Wake-On-LANConnector: SupportsWake-On-LAN activity through optional
ASUS PCI-L101 Fast Ethernet card.
•Programmable Flash ROM: 2Mbit programmable bios (Flash EEPROM), offer-
ing built-in, hardware-based virus protection and enhanced ACPI for Windows 98
compatibility, autodetection of hard drives, PS/2 mouse, and Plug and Play devices
for virtually automatic setup of hard drives, expansion cards, and other devices.
•Onboard AGP VGA: Features ATI 3D RAGE PRO AGP 2X VGA chipset
onboard with sideband addressing and 8MB SDRAM graphics memory.
•SB-Link™: Features Creative’s SB-Link™, allowing SB16 compatibility, using Intel’s
PC-PCI technology, to AWE64D or compatible PCI audio cards.
•PCI & ISA Expansion Slots: Provides four 32-bit PCI and two 16-bit ISA slots .
•Super Multi-I/O: Provides two high-speed UART compatible serial ports and
oneparallel port withEPPand ECPcapabilities. UART2canalso be directedfrom
COM2 to the Infrared Module for wireless connections.
• Desktop Management Interface (DMI): Supports DMI through BIOS, which
allows hardware to communicate within a standard protocol creating a higher
level of compatibility. (Requires DMI-enabled components.)
•Ultra DMA/33 Bus Master IDE: Comes with an onboard PCI Bus Master IDE
controller with two connectors that supports four IDE devices in two channels,
supports UltraDMA/33, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2,
and supports Enhanced IDE devices, such as Tape Backup and CD-ROM, and
LS-120 drives.
•SCSI BIOS: Supports optional ASUS SCSI controller cards through onboard
SYMBIOS firmware.
•IrDAConnector:Supportsanoptionalinfrared port module forwirelessinterface.
•Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI mas-
ter busses to memory to CPU.
II. FEATURES
Specifications
II. FEATURES

ASUS P2B98-XV User’s Manual 9
II. FEATURES
II. FEATURES
Motherboard Parts
The ASUS P2B98-XV Motherboard
USB Port 1 (Top)
USB Port 2 (Bottom)
VGA(Bottom)
4 PCI Slots
8MB SDRAM
VGAmemory
2ISA Slots
PS/2 Mouse (Top)
PS/2 Keyboard (Bottom)
Parallel (Top)
3 DIMM Sockets
Intel 440BXAGPset
SEC CPU Slot
COM 1 (Bottom)
Intel PIIX4E
PCIset
Floppy / IDE
Connectors
OnboardATIAGP
2XVGA Chipset
Programmable
Flash EEPROM
System
Buzzer
COM 2
Connector
Super Multi-I/O Chip
AMC
Connector
Wake-On-LAN
Connector

10 ASUS P2B98-XV User’s Manual
III. INSTALLATION
Layout of the ASUS P2B98-XV Motherboard
USB
PS/2
VGA
COM 1
FSB
BF0 BF1 BF2 BF3
01 23 45
SYS_FAN
COM2
CLRTC
CPU_FAN
Floppy Disk Drive
INT_EN
2 MB SDRAM
2 MB SDRAM
2 MB SDRAM
2 MB SDRAM
Wake-On-LAN
Connector
Intel
440BX
AGPset
DIMM Socket 2 (64-bit, 168-pin module)
DIMM Socket 3 (64-bit, 168-pin module)
Single Edge Contact Slot
DIMM Socket 1 (64-bit, 168-pin module)
USB 1 (TOP PORT)
USB 2 (BOTTOM)
MOUSE (TOP PORT)
KEYBOARD (BOTTOM)
PARALLEL PORT
Keyboard
BIOS &
Multi-I/O
Chip
Flash EEPROM
(Programable BIOS)
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
ISA Slot 1
ISA Slot 2
Onboard
ATI AGP 2X
VGA
Chipset
Intel PIIX4E
PCIset
CMOS Power
(CR2032 3V
Lithium Cell)
Secondary IDE
Primary IDE
ATX Power Connector
AMC Connector
BUS Freq.
Row
Panel Connectors
Buzzer
Freq. Ratio
Infrared (IrDA)
SB-LINK™
Connector
Board Layout
III. INSTALLATION

ASUS P2B98-XV User’s Manual 11
III. INSTALLATION
Jumpers
1) CLRTC p. 13 ClearRealTimeClock(RTC)RAM(Short/ClearCMOS)
2) INT p. 13 VGA Interrupt Setting
3) FS0, FS1, FS2 p. 14 CPU Bus Frequency
4) BF0, BF1, BF2, BF3 p. 14 CPU Core:Bus Frequency Multiple
Expansion Slots/Sockets
1) DIMM Sockets p. 16 DIMM Memory Module Support
2) SEC CPU Slot p. 18 Single Edge Contact CPU Support
3) ISA1, ISA2 p. 23 16-bit ISA Bus Expansion Slots
4) PCI1, PCI2, PCI3, PCI4 p. 23 32-bit PCI Bus Expansion Slots
Connectors
1) PS2KBMS p. 25 PS/2 Keyboard Connector (6-pin female)
2) PS2KBMS p. 25 PS/2 Mouse Connector (6-pin female)
3) PRINTER p. 26 Parallel (Printer) Port Connector (25-pin female)
4) COM1 p. 26 Serial Port COM1 (One 9-pin male)
5) VGA p. 26 Monitor (VGA) Output Connector (15-pin female)
6) USB p. 26 Universal Serial BUS Ports 1 & 2 (two 4-pin female)
7) IR p. 27 Infrared Port Module Connector (5 pins)
8) FLOPPY p. 27 Floppy Drive Connector (34-1 pins)
9) SYS_FAN p. 27 System Fan Connector
10) PRIMARY/SECOND. IDE p. 28 Primary / Secondary IDE Connector (40 pins)
11) ATXPWR p. 28 ATX Motherboard Power Connector (20 pins)
12) WOL_CON p. 29 Wake-On-LAN Connector (3 pins)
13) SBLINK p. 29 SB-Link
TM
Connector (6-1 pins)
14) M.LED (PANEL) p. 30 Message LED Lead (2 pins)
15) SMI (PANEL) p. 30 SMI Switch Lead (2 pins)
16) SPEAKER (PANEL) p. 30 Speaker Connector (4 pins)
17) PWR (PANEL) p. 30 ATX Power Switch / Soft Power Switch (2 pins)
18)
PLED ( PANEL ) p. 30 System Power LED Lead (3 pins)
19) RESET (PANEL) p. 30 Reset Switch Lead (2 pins)
Board Layout
III. INSTALLATION

12 ASUS P2B98-XV User’s Manual
Jumpers
III. INSTALLATION
WARNING! Computer motherboards and expansion cards contain very delicate
Integrated Circuit (IC) chips.To protect them against damage from static electric-
ity, you should follow some precautions whenever you work on your computer.
1. Unplug your computer when working on the inside.
2. Use a grounded wrist strap before handling computer components. If you do
not have one, touch both of your hands to a safely grounded object or to a
metal object, such as the power supply case.
3. Hold components by the edges and try not to touch the IC chips, leads or
connectors, or other components.
4. Place components on a grounded antistatic pad or on the bag that came with
the component whenever the components are separated from the system.
III. INSTALLATION
Installation Steps
Before using your computer, you must complete the following steps:
1. Set Jumpers
2. Install Memory 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

ASUS P2B98-XV User’s Manual 13
III. INSTALLATION
III. INSTALLATION
Jumpers
1. Jumpers
1. Clear Real Time Clock (RTC) RAM (CLRTC)
The CMOS RAM is powered by the onboard button cell battery. To clear the
RTC data: (1) Turn off your computer and uplug itsAC power, (2) Short the two
solder points labeled CLRTC, (3) Turn on your computer, (4) Hold down <De-
lete> during bootup and enter BIOS setup to re-enter user preferences.
P2B98-XV Real Time Clock RAM (CLRTC)
Short the solder points to clear CMOS
2. VGA Interrupt Selection (INT)
These jumpers allow you to set the VGAinterrupt method. The default disables
the chipset’s internal interrupt routing. Some video capture cards may require
that the interrupt be assigned by the onboard chipset.
P2B98-XV VGA Interrupt
Disabled
1
2
3
Enabled
1
2
3
INT INT

14 ASUS P2B98-XV User’s Manual
NOTES:Overclocking your processor is not recommended. It may result in a slower
speed. Voltage Regulator Output Selection (VID) is not needed for the Pentium II
processor because it sends a VID signal directly to the onboard power controller.
Set the jumpers by the Internal speed of your processor asfollows:
(BUS Freq.) (Freq. Ratio)
CPU Model Freq. Ratio BUS F. FSB BF0 BF1 BF2 BF3
Intel Pentium II 450MHz 4.5x 100MHz [1-2] [1-2] [2-3] [1-2] [2-3]
Intel Pentium II 400MHz 4.0x 100MHz [1-2] [2-3] [2-3] [1-2] [2-3]
Intel Pentium II 350MHz 3.5x 100MHz [1-2] [1-2] [1-2] [2-3] [2-3]
Intel Pentium II 333MHz 5.0x 66MHz [2-3] [2-3] [1-2] [1-2] [2-3]
Intel Pentium II 300MHz 4.5x 66MHz [2-3] [1-2] [2-3] [1-2] [2-3]
Intel Pentium II 266MHz 4.0x 66MHz [2-3] [2-3] [2-3] [1-2] [2-3]
Intel Pentium II 233MHz 3.5x 66MHz [2-3] [1-2] [1-2] [2-3] [2-3]
WARNING! Frequencies above 100Mhz exceed the specifications for the on-
board Intel Chipset and are not guaranteed to be stable.
III. INSTALLATION
Jumpers
III. INSTALLATION
3. CPU Bus Frequency (FSB)
This option tells the clock generator what frequency to send to the CPU, DRAM, and
440BX AGPset. This allows the selection of the CPU’s External frequency (or BUS
Clock). The BUS Clock multiplied by the BUS Ratio equals the CPU’s Internal fre-
quency (the advertised CPU speed).
4. CPU Core:BUS Frequency Multiple (BF0, BF1, BF2, BF3)
This option sets the frequency ratio between the Internal frequency of the CPU
and the CPU’s External frequency. These must be set in conjunction with the CPU
Bus Frequency.
CPU Bus Frequency
CPU Core:Bus Frequency Ratio
4.0x(4/1)3.5x(7/2)3.0x(3/1)2.5x(5/2)2.0x(2/1)
BF2
BF3
BF1
BF0 123
100MHz
1
2
3
66MHz
1
2
3
123 123 123 123 123 123
4.5x(9/2) 5.0x(5/1)
FSB FSB
P2B98-XV CPU Jumpers
Intel Pentium II Processor in an SEC cartridge
(233-450MHz 512KB/128KB/0KB L2 Cache)

ASUS P2B98-XV User’s Manual 15
III. INSTALLATION
(This page was intentionally left blank)

16 ASUS P2B98-XV User’s Manual
III. INSTALLATION
System Memory
III. INSTALLATION
2. System Memory (DIMM)
Only Dual Inline Memory Modules (DIMMs) can be used with this motherboard.
Three sockets are available for 3.3Volt (power level) Unbuffered Synchronous
DRAMs (SDRAMs). One side (with memory chips) of the DIMM module takes up
one row on the motherboard.
To utilize the chipset’s Error Checking and Correction (ECC) feature, you must use
a DIMM module with 9 chips per side (standard 8 chips/side + 1 parity chip) and
make the proper settings in the BIOS Chipset Features Setup.
IMPORTANT (see General DIMM Notes below)
• SDRAMs used must be compatible with the current Intel PC/100 SDRAM
specification.
Install memory in any combination as follows:
DIMM Location 168-pin DIMM Memory Modules Total Memory
Socket 1 (Rows 0&1) SDRAM 8, 16, 32, 64, 128, 256MB x1
Socket 2 (Rows 2&3) SDRAM 8, 16, 32, 64, 128, 256MB x1
Socket 3 (Rows 4&5) SDRAM 8, 16, 32, 64, 128, 256MB x1
Total System Memory (Max 768MB) =
General DIMM Notes
•Use only PC100-compliant DIMMs. This motherboard operates at 100MHz, thus most
systems will not even boot if non-compliant modules are used because of the strict timing
issues involved under this speed.
•Two possible memory chips are supported: SDRAM with and without ECC.
• SDRAM chips are generally thinner with higher pin density than EDO (Extended Data
Output) chips.
• BIOS shows SDRAM memory on bootup screen.
• 8 chips/side modules do not support ECC, only 9 chips/side modules support ECC.
• Single-sidedDIMMscomein16, 32, 64,128MB; double-sidedcomein32,64,128,256MB.
ASUS Memory Example:
Non-ECC SDRAM DIMM (8 chips)
WARNING: Memory modules must have 18 chips or less. Memory modules
with more that 18 chips will cause unstable operation.

ASUS P2B98-XV User’s Manual 17
III. INSTALLATION
III. INSTALLATION
System Memory
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 a different pin contact on each side and therefore have a higher pin density.
P2B98-XV 168 Pin DIMM Memory Sockets
88 Pins
20 Pins 60 Pins
Lock
The Dual Inline Memory Module (DIMM) memory modules must be 3.3Volt Un-
buffered Synchronous DRAM (SDRAM). YoucanidentifythetypeofDIMMmodule
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.

18 ASUS P2B98-XV User’s Manual
CPU
III. INSTALLATION
III. INSTALLATION
3. Central Processing Unit (CPU)
This motherboard provides a Single Edge Contact (SEC) slot for a Pentium II pro-
cessor packaged in an SEC cartridge.
Pentium II Processor
WARNING! Be sure that sufficient air is circulating across the processor’s pas-
sive heatsink because the processor could overheat, which could damage both the
processor and the motherboard. You may install an auxiliary fan, if necessary.
You should check to see that you have the following 9 items.
NOTE: The pictures in the following pages will have the same item numbers next to
them for your reference. The design and color of your items may be slightly different.
Attach Mount Bridges (Items 1,2)
(1)
(2)
Pentium II Retention Mechanism (Item 3)
Lock Holes
Captive Nut
(3)
Pentium II Processor Heatsink (Item 8)
(8)
Heatsink bottom Groove
for the Support Top Bar
Larger Fin should
be on the bottom.
Heatsink Support Base/Top Bar (Items 4-7)
Top Bar (4)
Base (7)
Posts
Pin
(5)
(6)
CPU (Item 9)
Intel Pentium II Processor in an SEC cartridge
(233-450MHz 512KB/128KB/0KB L2 Cache)

ASUS P2B98-XV User’s Manual 19
III. INSTALLATION
The heatsinks shown in this manual are for reference purposes only. The recom-
mended heatsinks for the Pentium II processor are those with three-pin fans that can
be connected to the CPU fan connector on the motherboard. These heatsinks have
the added benefits of proper heat dissipation and with the hardware monitor, the
ability to monitor the fan’s RPM and use the alert function through the included
LANDesk Client Manager (LDCM) software.
AAVID Heatsink
The procedures for installing theAAVID heatsink with fan is similar to those of the
heatsink without a fan.You will not, however, be able to use the heatsink support top
bar because of the fan. The heatsink support top bar will, however, still be included
in the package, in case you use a heatsink without a fan.
Elan Vital Heatsink
The procedures for installing the ElanVital heatsink with fan is also similar to those of
the heatsink without a fan. The Elan Vital heatsink, however, comes with a lever to
clamp the heatsink into the SEC cartridge. Mount the heatsink in the orientation as
shown thenflip thelever from“Unlock” to “Lock”.You will also notbe able to usethe
heatsink support top bar because of the fan. The heatsink support top bar will, how-
ever, still be included in the package, in case you use a heatsink without a fan.
CPU
III. INSTALLATION

20 ASUS P2B98-XV User’s Manual
The ASUS P2B98-XVAs Shipped
The ASUS P2B98-XV is shipped with the attach mount bridges already installed.
Lock holes
Captive nut
Captive nut
Installing the Pentium II Processor
1. Mount the Pentium II Retention Mechanism: The retention mechanism is
designed to fit into the SEC slot only one way. Be sure to align the notch in the
mechanism with the small rib on one side of the slot and that the mechanism is
properly seated on the board. Then, screw the captive nuts in place. TIP: Orient
the mechanism’s lock holes toward the motherboard’s chipset (see motherboard
layout for the location of the Intel 440BXAGPset).
WARNING! Do not overtighten the captive nuts. Doing so could damage your
motherboard. Tighten captive nuts to no more than 6±1 inch/pound.
NOTE: Encircled items are points where the
attach mount bridges are factory-installed
SEC slot for the
Pentium II processor
III. INSTALLATION
CPU
III. INSTALLATION