Asus P2E-B User manual

R
P2E-B
Pentium®II Motherboard
USER’S MANUAL

2 ASUS P2E-B User’s Manual
USER'S NOTICE
Product Name: ASUS P2E-B
Manual Revision: 1.00
Release Date: March 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 OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 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 BEEN ADVISED OF THE POSSIBILITY
OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS 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.
Forprevious orupdated manuals,BIOS, drivers,or productrelease 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 MANUAL ARE 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 RESPONSIBILITY OR LIABILITY FOR
ANYERRORS ORINACCURACIESTHATMAYAPPEARINTHIS MANUAL,INCLUD-
ING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Copyright © 1998 ASUSTeK COMPUTER INC. All Rights Reserved.

ASUS P2E-B 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 Ave, 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

4 ASUS P2E-B User’s Manual
CONTENTS
I. INTRODUCTION........................................................................... 7
How this manual is organized.......................................................... 7
Item Checklist .................................................................................. 7
II. FEATURES .................................................................................... 8
Features of the ASUS P2E-B Motherboard ..................................... 8
Introduction to ASUS Smart Series motherboards ............... 9
Parts of the ASUS P2E-B Motherboard........................................... 11
III. INSTALLATION .......................................................................... 12
ASUS P2E-B Motherboard Layout ................................................. 12
Installation Steps.............................................................................. 14
1. Jumpers ........................................................................................ 14
Jumper Settings .................................................................... 15
2. System Memory (DIMM) ........................................................... 17
DIMM Memory Installation ................................................. 18
3. Central Processing Unit (CPU)................................................... 19
Pentium II Processor............................................................. 19
AAVID Heatsink .................................................................. 23
Elan Vital Heatsink ............................................................... 23
4. Expansion Cards .......................................................................... 24
Expansion Card Installation Procedure ................................ 24
Assigning IRQs for Expansion Cards................................... 24
Assigning DMA Channels for ISA Cards............................. 25
ISA Cards and Hardware Monitor ........................................ 25
5. External Connectors.................................................................... 26
Power Connection Procedures ................................................... 33
IV. BIOS SOFTWARE ........................................................................ 34
Support Software ............................................................................. 34
Flash Memory Writer Utility...................................................... 34
Main Menu ........................................................................... 34
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

ASUS P2E-B User’s Manual 5
CONTENTS
Power Management Setup.......................................................... 47
Details of Power Management Setup ................................... 47
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 Smart Motherboard Support CD........................................... 56
Desktop Management Interface (DMI)............................................ 57
Introducing the ASUS DMI Configuration Utility ............... 57
System Requirements ........................................................... 57
Using the ASUS DMI Configuration Utility ........................ 58
VII. ASUS LAN Card......................................................................... 59
ASUS PCI-L101 Fast Ethernet Card ............................................... 59
Features ............................................................................................ 60
Software Driver Support ............................................................ 60
Question and Answer ................................................................. 60

6 ASUS P2E-B User’s Manual
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 interfer-
ence 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 CommunicationsStatement
This digital apparatus does not exceed the Class B limits for radio noise emissions
from digital apparatus set out in the Radio Interference Regulations of the Canadian
Department of Communications.

ASUS P2E-B User’s Manual 7
I. INTRODUCTION
I. INTRODUCTION
(Sections/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 Software: Information on the included support software
VI. ASUS L101 Card: Installation of the ASUS LAN card (optional)
Item Checklist
Please check that your package is complete. If you discover damaged or missing
items, please contact your retailer.
(1) ASUS Motherboard
(1) Retention mechanism & heatsink support
(2) Attach mount bridges (factory installed)
(1) 9pin male serial + 25pin male serial external connector set
(1) 25pin female parallel + 6pin female PS/2 mouse 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) diskette or CD with support drivers and utilities:
• Flash Memory Writer utility to update the onboard programmable BIOS
• LANDesk Client Manager (LDCM) Software
• ASUS PC Probe Utility
• Desktop Management Interface (DMI) utility
• Readme files for descriptions and use of the files
• Technical Support Form
(1) User’s Manual
PS/2 Mouse, Infrared, USB1, and USB2 external connector module (optional)
ASUS PCI-L101 Wake-on-LAN 10/100 Ethernet Card (optional)

8 ASUS P2E-B User’s Manual
II. FEATURES
(Features)
II. FEATURES
Features of the ASUS P2E-B Motherboard
TheASUS P2E-B is carefully designed for the demanding PC user who wants many
intelligent features in a small package. This motherboard:
•Multi-Speed: Supports an Intel Pentium
®
II processor from 233MHz–333MHz.
•IntelAGPset: Features Intel’s 440EXAGPset with I/O subsystems.
•EnhancedACPI&Anti-BootVirusBIOS:ProgrammableBIOS(FlashEEPROM),
offering enhanced ACPI for Windows 98 compatibility, built-in hardware-based
virus protection, and autodetection of most devices for virtually automatic setup.
•Versatile Memory: Is equipped with two DIMM sockets to support 8MB-
128MB 168-pin 3.3Volt SDRAM/EDO memory modules up to 256MB.
•AGPSlot:SupportsAcceleratedGraphics Port cards for high performance,com-
ponent level interconnect targeted at 3D graphical display applications.
•Dual Power Supply: Has bothAT andATX power connectors onboard to sup-
port an AT or ATX power supply with soft-on/off features.
•ISA & PCI Expansion: Provides two 16-bit ISA expansion slots and three 32-
bit PCI expansion slots.
•Wake on LAN: Supports Wake on LAN activity through optional ASUS
PCI-L101 Fast Ethernet card.
• 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.
• 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: Comes with an onboard PCI Bus Master IDE controller
with two connectors that supports four IDE devices in two channels, supports
PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2, and supports Enhanced
IDE devices such asTape 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.
•Multi-Cache: Supports a Pentium
®
II processor with either 512KB, 256KB, or
0KB Pipelined Burst Level 2 cache in the Single Edge Contact (SEC) cartridge.
•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.
•Optional PS/2 Mouse, USB, IrDA: Supports an optional cable and bracket set
to mount the connectors to an unused expansion slot on the system chassis. A
second IrDA connector is available for a standard individual infrared cable set.

ASUS P2E-B User’s Manual 9
II. FEATURES
II. FEATURES
(Smart Series)
Introduction to ASUS Smart Series motherboards
Performance
• SDRAM Optimized Performance - ASUS smart 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 smart series of motherboards with
Intel chipsets 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 smart 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 smart 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.
Intelligence: (with optional Hardware/Thermal Monitor only)
• Fan Status Monitoring and Alarm - To prevent system overheat and system
damage, the CPU fan and system fans can be monitored for RPM and failure.
Each fan can be set for its normal RPM range and alarm thresholds.
•Temperature Monitoring andAlert - To prevent system overheat and system
damage, there are heat sensors to monitor the CPU (the Pentium II processor
requires a special heatsink with a thermal sensor) and system temperatures to
warn of damaging temperatures.

10 ASUS P2E-B 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 as Windows 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.
• 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 power supply) -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 (requires ATX power supply and external modem) - This
allows a computer to be turned on remotely through an external 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.
• Keyboard Power Up- Keyboard Power Up can be enabled or disabled to allow
the computer to be powered on by pressing the space bar on the keyboard.

ASUS P2E-B User’s Manual 11
Parts of the ASUS P2E-B Motherboard
II. FEATURES
II. FEATURES
(Motherboard Parts)
SEC CPU Socket
(Slot1)
3 PCI Slots
Super Multi-I/O
Programmable
Flash ROM
2ISA Slots
IDE Connectors
Serial, Parallel, Floppy
Intel’s 440EX
AGPset
2 DIMM Sockets
HardwareMonitor
PS/2 Mouse, USB, IrDA AT Power
Connector
ATX Power
Connector
Thermal Sensor
AGP Slot

12 ASUS P2E-B User’s Manual
III. INSTALLATION
ASUS P2E-B Motherboard Layout
(Motherboard Layout)
III. INSTALLATION
R
Panel Connectors
Infrared
RTC Clear
COM 2
COM 1
IDE LED
Power Fan
Chassis
Fan
CPU Fan
Wake
on LAN
Freq. Ratio
Row 32 10
Clock Freq
FS1
FS2
FS0
BF1
BF2
BF0
BF3
P8
P9
RT2
Serial Ports
Floppy Drives
Parallel (Printer) Port
Keyboard
Power
ISA Slot 1
ISA Slot 2
AGP Slot
PCI Slot 1
PCI Slot 2
PCI Slot 3
Super Multi-I/O
Intel
PIIX4
PCIset
Intel
440EX
AGPset
System BIOS Flash EEPROM
Socket 2 (64-bit or 72-bit with ECC) 168-pin DIMM module Socket 1 (64-bit or 72-bit with ECC) 168-pin DIMM module
Key-
board
CR2032 3V
Lithium Cell
BIOS Power
ASUS ASIC
AT Power Input
ATX Power Input
Secondary IDE
Primary IDE
PS/2 Mouse,
USB, IrDA
Thermal
Sensor
Single Edge Contact CPU Slot (Slot 1)
Hardware
Monitor
Pentium II Thermal
Sensor Connector

ASUS P2E-B User’s Manual 13
III. INSTALLATION
Jumpers
1) CLRTC p. 15 Real Time Clock RAM (Clear Data)
2) KBPWR p. 15 Keyboard Power Up (Enable/Disable)
3) FS0, FS1, FS2 p. 16 CPU External Clock (BUS) Frequency Selection
4) BF0, BF1, BF2, BF3 p. 16 CPU:BUS Frequency Ratio
Expansion Slots
1) DIMM Sockets p. 17 168-Pin DIMM Memory Support
2) SEC CPU Slot p. 19 Single Edge Contact CPU Support
3) ISA Slot 1, 2 p. 24 16-bit ISA Bus Expansion Slots
*
4) PCI Slot 1,2,3 p. 24 32-bit PCI Bus Expansion Slots
5) AGP p. 25 Accelerated Graphics Port
Hardware Monitor
1) RT2 p. 22 Pentium II Processor Thermal Sensor Connector
Connectors
1) KB p. 26 Keyboard Connector (5-pin Female)
2) FLOPPY p. 26 Floppy Drive Connector (34-1pins)
3) PRINTER p. 27 Parallel (Printer) Port Connector (26-1pins)
4) COM1, COM2 p. 27 Serial Port COM1 & COM2 (10-1pins)
5) IDE1, IDE2 p. 28 Primary / Secondary IDE Connector (40-1pins)
6) IDELED p. 28 IDE LEDActivity Light (2 pins)
7) FAN p. 27 Power Supply, Chassis, CPU Fan Power Leads (3 pins)
8) W0L_CON p. 32 Wake on LAN Activity Connector (3-pins)
9) MSG.LED (PANEL) p. 30 System Message LED (2 pins)
10) SMI (PANEL) p. 30 SMI Switch Lead (2 pins)
11) PWR SW. (PANEL) p. 30 ATX Power & Soft-Off Switch Lead (2 pins)
12) RESET (PANEL) p. 30 Reset Switch Lead (2 pins)
13)
PWR.LED ( PANEL ) p. 30 System Power LED Lead (3 pins)
14) KEYLOCK ( PANEL ) p. 30 Keyboard Lock Switch Lead (2 pins)
15) SPEAKER (PANEL) p. 30 Speaker Output Connector (4 pins)
16) USB/MIR p. 31 PS/2 Mouse/USB/IR Combo-Connector (18-1pins)
17) IR p. 31 Second Infrared Port Module Connector (5-pins)
18) ATX POWER p. 32 ATX Motherboard Power Connector (20-pins)
19) AT POWER p. 32 AT Motherboard Power Connector (12-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 P2E-B 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 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 motherboard layout for locations of jumpers. The
jumper settings will be described numerically, such as [----], [1-2], [2-3] for no con-
nection, connect pins 1&2, and connect pins 2&3 respectively. Pin 1 for our mother-
boards 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 andcomponents, such asSCSI
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 P2E-B User’s Manual 15
III. INSTALLATION
Jumper Settings
1. Real Time Clock (RTC) RAM (CLRTC)
The CMOS RAM is powered by the onboard button cell battery. To clear the
RTC data: (1) Unplug your computer, (2) Short solder points, (3) Turn on your
computer, (4) Hold down <Delete> during bootup and enter BIOS setup to re-
enter user preferences.
RTC RAM CLRTC
Clear Data [short solder points momentarily]
R
P2E-B Clear RTC RAM
CLRTC
2. Keyboard Power Up (KBPWR)
This allows you to disable or enable the keyboard power up function. Set this
jumper to Enable if you wish to use your keyboard (by pressing the space bar) to
power up your computer. This feature requires an ATX power supply that can
supply at least 300mAmp on the +5VSB lead. The default is set to Disable
because not all computers have the appropriate ATX power supply. Your com-
puter will not power on if you set this to Enable and are not using the proper
ATX power supply.
Setting KBPWR
Disable [1-2] (default)
Enable [2-3]
R
Disable
(Default)
123 123
Enable
P2E-B Keyboard Power
III. INSTALLATION
(Jumpers)

16 ASUS P2E-B User’s Manual
III. INSTALLATION
(Jumpers)
III. INSTALLATION
WARNING! Do not overclock your processor. Frequencies above 66MHz ex-
ceed the specifications for the onboard Intel Chipset and are not guaranteed to be
stable. Overclocking can cause undue stress on the CPU and motherboard. It
may result in a slower speed or other unpredictable outcomes. The table on the
following page shows the approved CPUs and their settings.
Intel Pentium II Processor in an SEC Cartridge
(233-400MHz 256/512KB L2 Cache)
Set the jumpers by the Internal speed of your processor as follows:
(BUS Freq.) (Freq. Ratio)
CPU Model Speed F. Ratio BUS F. FS0 FS1 FS2 BF0 BF1 BF2 BF3
Intel Pentium II 333MHz 5.0x 66MHz [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [2-3]
Intel Pentium II 300MHz 4.5x 66MHz [1-2] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3]
Intel Pentium II 266MHz 4.0x 66MHz [1-2] [1-2] [1-2] [2-3] [2-3] [1-2] [2-3]
Intel Pentium II 233MHz 3.5x 66MHz [1-2] [1-2] [1-2] [1-2] [1-2] [2-3] [2-3]
NOTE: 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.
3. 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
timestheBUSRatioequalsthe CPU's Internal frequency (the advertised CPU speed).
4. CPU to BUS Frequency Ratio (BF0, BF1, BF2, BF3)
These jumpers set the frequency ratio between the Internal frequency of the CPU
and the External frequency (called the BUS Clock) within the CPU. These must
be set together with the above jumpers CPU External (BUS) Frequency Selection.
R
CPU Bus Frequency
CPU Core:Bus Frequency Multiple
P2E-B CPU Settings
83MHz
FS1
FS0
FS2
123
66MHz
FS1
FS0
FS2
123
75MHz
FS1
FS0
FS2
123
60MHz
FS1
FS0
FS2
123
3.5x(7/2)
BF1
BF2
BF0
BF3
123
4.0x(4/1)
BF1
BF2
BF0
BF3
123
4.5x(9/2)
BF1
BF2
BF0
BF3
123
5.0x(5/1)
BF1
BF2
BF0
BF3
123
3.0x(3/1)
BF1
BF2
BF0
BF3
123

ASUS P2E-B User’s Manual 17
III. INSTALLATION
(Jumpers)
III. INSTALLATION
2. System Memory (DIMM)
Only Dual Inline Memory Modules (DIMM) can be used with this motherboard.
Two sockets are available for3.3Volt(powerlevel)Unbuffered Synchronous DRAMs
(SDRAM) or EDO DRAM of either 8, 16, 32, 64, or 128MB. One side (with memory
chips) of the DIMM module takes up one Row on the motherboard.
Error Checking and Correction (ECC) feature is not supported on this motherboard.
ECC DIMM will work on this motherboard minus the ECC feature.
IMPORTANT: Memory speed setup is required through "Auto Configuration" in
BIOS Chipset Setup of the BIOS SOFTWARE.
WARNING: Memory modules must have 18 chips or less. Memory modules
with more that 18 chips will cause unstable operation.
General DIMM Notes: (not true for all memory modules)
• Four possible memory chips are available: EDO or SDRAM with and without ECC.
• SDRAM chips are generally thinner with higher pin density than EDO chips.
• BIOS shows EDO or SDRAM memory on bootup screen.
• 8 chip/side modules do not support ECC, only 9 chip/side modules support ECC.
• Single sided modules are usually 16 or 64 MB, double sided are usually 8, 32, or 128MB.
ASUS Memory Examples:
ECC EDO DIMM (9 chips) (ECC feature not supported on this motherboard)
Non-ECC SDRAM DIMM (8 chips)
Install memory in any combination as follows:
DIMM Location 168-pin DIMM Memory Modules Total Memory
Socket 1 (Rows 0&1) SDRAM/EDO 8, 16, 32, 64, 128MB x1
Socket 2 (Rows 2&3) SDRAM/EDO 8, 16, 32, 64, 128MB x1
Total System Memory (Max 256MB) =

18 ASUS P2E-B User’s Manual
DIMM Memory Installation
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. DIMM
modules are longer and have different pin contact on each side and therefore have a
higher pin density. SIMM modules have the same pin contact on both sides.
R
P2E-B 168 Pin DIMM Memory Sockets
20 Pins
60 Pins
88 Pins
Lock
The Dual Inline Memory Module (DIMM) must be 3.3VUnbuffered for this moth-
erboard. 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 of DIMM to be inserted into the DIMM socket
on the motherboard. Four clock signals are supported on this motherboard. You must
ask your retailer for the specifications before purchasing memory modules.
III. INSTALLATION
(System Memory)
III. INSTALLATION

ASUS P2E-B User’s Manual 19
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 circulation is available across the
processor’s passive heatsink. Without sufficient circulation, the processor could
overheat and damage both the processor and the motherboard. It is recommended
that you install an auxiliary fan.
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 refer-
ence. 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)
Intel Pentium II Processor in an SEC Cartridge
(233-400MHz 256/512KB L2 Cache)
CPU (Item 9)
III. INSTALLATION
(CPU)
III. INSTALLATION

20 ASUS P2E-B User’s Manual
III. INSTALLATION
(CPU)
III. INSTALLATION
The Motherboard As Shipped
Four screws should be showing next to each corner of the SEC CPU Slot using two
attach mount bridges from the underside of the motherboard.
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.
TIP: Orient the mechanism’s lock holes toward the motherboard’s chipsets (see
motherboard layout for the location of the Intel chipset).
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.
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 screws
from the mount bridges (1 & 2)
SEC CPU slot
(1)
(2)
Lock holes
Captive nut
Captive nut
(3)