Abit IT5 User Manual
Table of Contents
Chapter 1 Introduction of IT5 Series Features
¬ IT5V.....................................................................................1-2
l Specifications ....................................................................1-2
l Layout diagram.................................................................1-4
l System block diagram.......................................................1-5
- IT5H.....................................................................................1-6
l Specifications ....................................................................1-6
l Layout diagram.................................................................1-8
l System block diagram.......................................................1-9
Chapter 2 Installing the Mainboard
¬ Standard External Connectors................................................2-3
- Jumpers and Switches..........................................................2-10
® Presentation and Installation of the CPU...............................2-11
¯ Installing Pipeline Burst SRAM.............................................2-14
° Installing System Memory 【DRAM Memory】 ................2-15
Chapter 3 Introduction to BIOS
¬ CPU setup 【CPU SOFT MENU™ 】................................3-4
- Standard CMOS Setup Menu..............................................3-10
® BIOS Features Setup Menu.................................................3-12
¯ Chipset Features Setup Menu...............................................3-18
° Power Management Setup Menu..........................................3-20
± PCI & Onboard I/O Setup...................................................3-24
² Load BIOS Defaults ............................................................3-30
³ Load Setup Defaults.............................................................3-30
´ Password Setting .................................................................3-31
µ IDE HDD Auto Detection....................................................3-32
Part Number:MN-090-B41-91 Rev:1.04
Appendix A Quick Installation
Appendix B Intel Pentium CPUs
Appendix C AMD-K5 CPUs
Appendix D Cyrix 6x86 CPUs
Appendix E General Discussion about HDD Installation
Appendix F Technical Support
Appendix G Flash BIOS User Instructions
Introduction of IT5 Series Features 1-1
Chapter 1 Introduction of IT5
Series Features
The IT5 series has been especially designed for File server, Workstation
and Professional users. It can support a wide range of processors, including all
Intel CPUs (P54C) and Intel CPUs with MMX (P55C), as well as all
AMD-K5 and Cyrix 6x86/6x86L CPUs. It also takes into account, as much as
possible, all future CPUs.
This series uses SOFT MEN U™ technology, which means that all the
parameters can be configured without using DIP switches or jumpers. The
configuration is entirely achieved through a “Soft Switch” that allows the user to
set CPU speed and operating voltage with ease.
The IT5 series uses Intel 430VX and 430HX series chipsets, and has
256K or 512K Level-2 Pipeline Burst SRAM on board. It also provides an
extension slot allowing the user to upgrade Pipeline Burst SRAM to 512K.
Two 168-pin DIMM slots and four 72-pin SIMM slots meet the
requirements for all memory configurations required by high level computing.
The 168-pin DIMM slots support traditional Fast Page and EDO DRAM as a
memory standard for next generation 64-bit systems. The two 168-pin
DIMM slots have been reserved to meet requirements for both present and
future upgrades.
This series also provides two Universal Serial Bus (USB) ports and meets
the Concurrent PCI Rev. 2.1 standard. It also supports IDE interface for Fast
HDD (Mode 0~4), as well as IDE Bus Master. These features also meet
present and future interface standards and needs.
System BIOS features include Plug-and-Play (PnP), Advanced Power
Management (APM), the newest Desktop Management Interface (DMI), as
well as IT5’s unique CPU operating frequency and voltage setup feature in
order to meet modern computing demands.
1-2 Chapter 1
¬ IT5V
l Specifications:
1. CPU frequency and voltage setup with CPU “SOFT MENU™”
l Setup of the mainboard’s frequency and voltage without DIP
Switches or Jumpers.
l Modification of CPU operating voltage and frequency through
software configuration.
l Modification of CPU operating voltage and frequency directly on
screen.
2. Uses ZIF CPU Socket 7 for easy CPU installation
l Three voltage regulator/cooling plate sets for a more stable
CPU operating environment
l Supports Intel Pentium® CPUs: 75MHz to 200MHz and P55C
CPUs with MMX
l Supports all AMD sixth generation AMD-K5™ CPUs: 75MHz
to 166MHz, AMD-K6™ CPUs: 200MHz and 233MHz
l Supports all Cyrix sixth generation 6x86™ CPUs: P120+, P133+,
P150+, P166+
l Reserved circuitry supports future sixth generation CPUs
3. Chipset
l Intel 430VX chipset
l Supports standard version PCI 2.1
4. L2 Cache Memory
l 256K or 512K of cache memory (Pipeline Burst SRAM)
l Cache memory upgradeable to 512K
5. System DRAM
l Four 72-pin SIMM sockets: support FP and EDO DRAM
l Two 168-pin DIMM sockets: support FP, EDO and Synchronous
DRAM (SDRAM)
l DIMM sockets use PC modules (3.3V Unbuffered DRAM)
l Up to 128MB memory configuration possible
Introduction of IT5 Series Features 1-3
6. System BIOS
l AWARD BIOS
l Supports Plug-and-Play (PnP)
l Supports Advanced Power Management (APM)
l Supports Desktop Management Interface (DMI)
7. Multi I/O features
l Two Universal Serial Bus (USB) ports
l Four fast IDE channels (PIO mode 0~4 and Bus Master)
l One EPP/ECP parallel port and one 16550 serial port
l Two floppy disk drive connectors (FDD) (360K, 720K, 1.2M,
1.44M and 2.88M)
8. Other features
l Standard AT architecture dimensions
l Four ISA bus slots and four PCI bus slots
l Supports 3-MODE for a special Japanese floppy disk drive
l Supports two bootable hard disks--able to run two different
operating systems
Note: All brand names and trademarks are the property of their respective owners.
1-4 Chapter 1
l Layout diagram
Fig 1-1 Layout diagram
Introduction of IT5 Series Features 1-5
1
2
l System block diagram
Host BUS
Pentium Processor
3.3V
CACHE
(SRAM)
PCI BUS
CD ROM &
Hard Disk
Second Level
Cache
TAG
Fast
IDE
Ctrl
Tag Ctrl
TIO[0..7]
PIIX3
TVX
USB
Universal Serial Bus
Addr
Ctrl
Plink
Address/Data
Main
Memory
(DRAM)
TXD Ctrl
Control
USB
Control
Address
Data
Data
ISA Device(s)
TDX
PCI Device(s)
ISA BUS
Serial
ALi
M5123
Fig. 1-2 System block diagram
LPT
FDC
1-6 Chapter 1
- IT5H
l Specifications:
1. CPU frequency and voltage configuration with CPU “SOFT
MENU™”
l Setup of the mainboard’s frequency and voltage without DIP
Switches or Jumpers.
l Modification of CPU operating voltage and frequency through
software configuration.
l Modification of CPU operating voltage and frequency directly on
screen.
2. Uses ZIF CPU Socket 7 for easy CPU installation
l Three voltage regulator/cooling plate sets for a more stable
CPU operating environment
l Supports Intel Pentium® CPUs: 75MHz to 200MHz and P55C
CPUs with MMX
l Supports all AMD sixth generation AMD-K5™ CPUs: 75MHz to
166MHz, AMD-K6™ CPUs: 200MHz and 233MHz
l Supports all Cyrix sixth generation 6x86™ CPUs: P120+, P133+,
P150+, P166+
l Reserved circuitry supports future sixth generation CPUs
3. Chipset
l Intel 430 HX chipset
l Supports standard version PCI 2.1
4. L2 Cache Memory
l 256K or 512K of cache memory (Pipeline Burst SRAM)
l Cache memory upgradeable to 512K
5. System DRAM
l Four 72-pin SIMM sockets: support FP and EDO DRAM
l Two 168-pin DIMM sockets: support FP, EDO
l DIMM sockets use PC modules (3.3V Unbuffered DRAM)
l Supports error check and correction (ECC) function
l Up to 512MB memory configuration possible
Introduction of IT5 Series Features 1-7
6. System BIOS
l AWARD BIOS
l Supports Plug-and-Play (PnP)
l Supports Advanced Power Management (APM)
l Supports Desktop Management Interface (DMI)
7. Multi I/O features
l Two Universal Serial Bus (USB) ports
l Four fast IDE channels (PIO mode 0~4 and Bus Master)
l One EPP/ECP parallel port and one 16550 serial port
l Two floppy disk drive connectors (FDD) (360K, 720K, 1.2M,
1.44M and 2.88M)
8. Other features
l Standard AT architecture dimensions
l Four ISA bus slots and four PCI bus slots
l Supports 3-MODE for a special Japanese floppy disk drive
l Supports two bootable hard disks--able to run two different
operating systems
Note: All brand names and trademarks are the property of their respective owners.
1-8 Chapter 1
l Layout diagram
Fig. 1-3 Layout diagram
Introduction of IT5 Series Features 1-9
1
2
l System block diagram
Host BUS
CD ROM &
Hard Disk
Second Level
Cache
CACHE
(SRAM)
TAG
PCI BUS
Fast
IDE
Ctrl
Tag Ctrl
TIO[0..7]
TIO[8..10]
PIIX3
Pentium Processor
TXC
USB
Universal Serial Bus
3.3V
Addr
Ctrl
ECC
Data
Control
Address/Data
USB
Control
Address
Data
Main
Memory
(DRAM)
PCI Device(s)
ISA Device(s)
ISA BUS
Serial
ALi
M5123
LPT
FDC
1-10 Chapter 1
Fig. 1-4 System block diagram
Introduction of IT5 Series Features 1-11
Installing the Mainboard 2-1
Chapter 2 Installing the
Mainboard
This mainboard series not only provides all standard equipment for classic
personal computers, but also provides great flexibility for meeting future upgrade
demands. This chapter will introduce step by step all the standard equipment
and will also present, as completely as possible future upgrade capabilities.
This mainboard is able to support all Intel Pentium including P55C with MMX,
Cyrix 6x86, 6x86L and AMD-K5 processors now on the market. (For details,
see specifications in Chapter 1.) However, we cannot guarantee that the
description given in this manual on the circuitry of your mainboard will work for
processors not listed in Chapter 1. For example, the operating voltage of
Cyrix’s next generation CPUs is unknown at the present time. Thus we were
not able to include these specifications in your motherboard. We will supply
further information about CPU support when new CPUs arrive on the market.
This chapter is organized according the following features:
ΠStandard external connectors
• Jumpers and switches
Ž Installing the CPU--steps for installing Intel, Cyrix and AMD
processors.
• Installing cache memory--If you don’t want to upgrade the cache
memory you can skip this chapter.
• Installing the system memory.
NNNN
Before proceeding with the installation
Before installing the mainboard please be sure to turn off or disconnect the
power supply unit. Before making any modifications to the hardware
configuration of the mainboard, the power supply to any areas of the mainboard
you plan to modify should be turned off to avoid unnecessary damage to the
hardware.
2-2 Chapter 2
&
User friendly instructions
Our objective is to enable the novice computer user to perform the
installation by themselves. We have attempted to write this document in a very
clear, concise and descriptive manner to help overcome any obstacles you may
face during installation. Please read our instructions carefully and follow them
carefully step-by-step.
Installing the Mainboard 2-3
¬ Standard External Connectors
Inside the case of any computer several cables and plugs have to be
connected. These cables and plugs are usually connected one-by-one to
connectors located on the mainboard. You need to carefully pay attention to
any connection orientation the cables may have and, if any, notice the position of
the first pin of the connector. In the explanations that follow, we will describe
the significance of the first pin.
PN1 - Keylock connector Please pay attention to pin position and
orientation
This connector has a specific orientation. Connect the five -thread keylock
connector cable to the PN1 connector pins on the mainboard.
Pin number Name or significance of signal
1 +5VDC
2 No connection
3 Ground
4 Keyboard inhibit Signal
5 Ground
2-4 Chapter 2
Knowledge
Computer
The “keylock switch” is used to lock the computer’s
keyboard. This disables the keyboard so that unauthorized
persons cannot use it. When this function is in use, you will
need to use the unlock key to activate the keyboard.
PN1 - IDE LED connector
This connector has a specific orientation. Connect the two-thread IDE LED
connector cable attached to the case to the IDE LED connector on the
mainboard.
Pin number Name or significance of signal
7
8
LED’s Cathode
LED’s Anode
PN1 - Standby connector
There is no specific orientation. Most of the present AT cases do not support
this feature so most of you can ignore this instruction. If your case has a cable
for the Standby feature, you should connect this cable to the connector on the
Mainboard.
Pin number Name or significance of signal
10 Standby power supply【+5VSB】
11 Control signal of computer switch of the case
Computer
knowledge
The “standby connector,” unlike the traditional mechanical
switch, is an electronic way to turn the computer’s power off.
To use this feature, the power supply system must permit a
shutdown power supply (+5VSB), support the electronic
switch feature, and must also be used with connector JS1 on
the mainboard. For example, when using Windows 95,
your computer will automatically shut down after having saved
your work when you exit Windows. You do not need to
use the mechanical switch to turn the computer off.
Installing the Mainboard 2-5
PN1 - Hardware Suspend switch
There is no specific orientation. Connect the two-thread hardware suspend
plug to the PN1 connector pins on the mainboard. Since most cases do not
support this feature, most of you ignore this instruction. Furthermore, this
feature is not necessary as it is already a part of the mainboard.
Pin number Name or significance of the signal
13 Suspend
14 Ground
PN2 - Hardware Reset connector
There is no specific orientation. Connect the two -thread hardware reset cable
to the PN2 connector pins on the mainboard.
Pin number Name or significance of signal
1 Ground
2 Hardware reset signal
Computer
knowledge
The “Hardware Reset” is used to reset the computer during
operation without turning the computer off and back on.
For example, if you are running an application that stops
responding to the computer, you may press the Reset button
to restart the computer.
PN2 - Speaker connector
There is no specific orientation. Connect the four -thread speaker cable to the
PN2 connector pins on the mainboard.
Pin number Name or significance of signal
4 +5VDC
5 Ground
6 Ground
7 Sound Signal
2-6 Chapter 2
PN2 - Turbo switch LED connector
This connector has a specific orientation. Connect the two -thread turbo switch
LED plug to the PN2 connector pins on the mainboard.
Pin number Name or significance of signal
9 Anode terminal of Turbo LED
10 Cathode terminal of Turbo LED
Computer
knowledge
The “hardware Turbo LED” indicates the status of hardware
operating speed.
JS1 - Power Control connector
This has a specific orientation. The present power supply units of AT computer
do not support this feature, so you can ignore this connector. If your power
supply unit features this connector, insert plug JS1, but be sure that the
signification of the signal cable is the same, and be sure to use this feature in
connection with the Standby connector on connector PN1.
Pin number Name of the signal or signification
1 Power supply control signal 【PS_ON】
2 Standby power supply 【+5VSB】
3 Ground
Installing the Mainboard 2-7
FAN - CPU Fan power connector
This has a specific orientation. Connect the three-threads CPU fan cable to the
Fan connector.
Pin number Name of the signal or signification
1 Ground
2 +12V
3 Ground
Mouse - PS/2 Mouse connector Watch the pin number and the orientation
This has a specific orientation. Connect the six-threads PS/2 Mouse cable
provided to the Mouse connector on the mainboard.
Pin number Name of the signal or signification
1 Mouse data
2 No connection
3 Ground
4 +5VDC
5 Ground
6 Mouse clock
Computer
The “PS/2 Mouse Port” is different from COM1 or COM2
knowledge
serial ports to which you can also connect a Mouse. This
mainboard features an extra PS/2 Mouse port, so when you
buy a mouse, be sure that it is a PS/2 Mouse before connecting
it to this port. But if you cannot find any PS/2 Mouse, you can
still use COM1 or COM2 to connect a serial mouse to your
computer.
2-8 Chapter 2
J2 - Keyboard Connector
This has an orientation pin. Connect your keyboard connector to connector J2
on the mainboard.
Pin number Name of the signal or signification
1 Keyboard clock
2 Keyboard data
3 No connection
4 Ground
5 +5VDC
P8/P9 - Power input Connectors Watch the pin number and the
orientation
These have a specific orientation. The three warning marks indicate that if you
make a mistake in pin number or connection orientation, you could destroy your
equipment. During installation, you just need to connect to the correct pins and in
the correct orientation, and to connect connectors P8 and P9 of the power
supply unit to the connectors on the mainboard.
Pin number
1 POWERGOOD 7 Ground
2 +5VDC 8 Ground
3 +12VDC 9 -5VDC
4 -12VDC 10 +5VDC
5 Ground 11 +5VDC
6 G round 12 +5VDC
Name of the signal or
signification
Pin number
Name of the signal or
signification
Installing the Mainboard 2-9
IR - Infrared remote Connector Watch the pin number and the orientation
This has a specific orientation. Your mainboard supports this feature, but you
must buy the infrared remote device as an option.
Pin number Name of the signal or signification
1 +5VDC
2 No connection
3 Receive data
4 Ground
5 Transmit data
I/O Port connectors Watch the pin number and the orientation
Connector name Pin number Name of the peripheral connected
IDE 1 40 IDE Channel 1
IDE 2 40 IDE Channel 2
FDC 34 Floppy Disk connector
LPT 26 Parallel port connector
COM1 10 Serial port COM1 connector
COM2 10 Serial port COM2 connector
USB 16 Universal Serial Bus connector
2-10 Chapter 2
- Jumpers and Switches
CCMOS : Delete the contents of the CMOS
This jumper is set on pins 1 and 2 at the factory, in order for the
computer to function normally, so please do not change this setting.
The main feature of this jumper is to solve situations where the
computer crashes due to improper usage. For instance:
l You have forgotten the password you set.
l You have changed inappropriately the settings in the BIOS
menu.
l You want to change the version of flash BIOS.
All these errors are very serious, you must avoid them. But if you
have made one of these errors, this jumper can save your life . First
turn off the power supply and open the computer case, than place
the jumper on pins 2 and 3 in order to save your computer. But if
you use your computer normally, you should not need to use this
feature.
After you have deleted the CMOS information, the computer is saved, but
you still have to go back to the BIOS Setup menu, and reset one by one all
the specifications: CPU, date, hour, FDD and HDD parameters. etc., before
your computer will get back into normal operation.
JC1：Installing the cache memory in the cache memory extension
slot (COAST)
On delivery, the IT5 mainboard comes with a 256K or 512K cache
memory. If you already have 512K, your mainboard will not need a
cache extension, and you will not be able to see the extension slot.
But if you have only 256K, we have reserved an extension slot which
permits you to extend the cache to 512K. This is set up at the factory
with no jumper, which is what we call OFF status. You will need to
put the jumper in place only when you extend the cache. For mo re
details, refer to the section which deals with cache memory.
Installing the Mainboard 2-11
® Presentation and Installation of the CPU
Jumperless Mainboard (Mainboard with no DIP Switch or Jumper)
This mainboard series can be installed with CPU without the hardware
setting of the CPU.
On other boards, when you want to install the CPU, you have, more or
less, to setup some jumpers or DIP switches. With this mainboard, you will not
need to adjust any jumper or switch. The CPU speed and model is set up by
software, in order to allow the user to complete setup and installation
procedures easily. After you have inserted the CPU on the CPU socket, you
can close the computer case and turn the computer on. You just need to enter
the CPU SOFT MENU™ located in the BIOS Setup, and to setup the speed
and the voltage of the CPU to compete the installation. Even if you don’t need to
setup any switch, we recommend you to read our presentation of the CPUs, it
will be useful information for you.
Since 1996, every two or three months, Intel adds new models to the
Pentium CPU series. That is why the CPU market is filled with a lot of different
models and brands. All CPUs have different electrical specifications. That’s why
installing a CPU is becoming more and more complex. You can’t help that,
because everybody wants to be able to upgrade its hardware. So, you have to
take a bit of time to read this section, in order to be able to install a cheaper and
better processor.
This mainboard does not only support all the CPUs listed in the
specifications, but also has reserved several circuits in order to be able to
support future processors. But before we go further in our presentation, we
must clarify that “we have only tested the CPUs listed in Chapter 1”, we cannot
guarantee that this board will be able to support future products, because we
cannot forecast future developments. But we will do our best to support any
possible CPU.
Related terminology :
External clock
Also referred to as the external CPU clock, or “Bus clock”, it is the input
clock of the CPU. For instance, Intel Pentium P90, P120 and P150 all
have a 60MHz external CPU clock, but have different internal clock
2-12 Chapter 2
multiplier factors.
Installing the Mainboard 2-13
Clock multiplier factor
The real operation clock within the CPU is the multiple of the external
clock. We refer to this factor as the clock multiplier factor. The four
factors possible are 1.5, 2, 2.5 and 3. The factor differs from one CPU to
another. For instance, the Intel Pentium 166 CPU has a 66MHz external
clock, with a multiplier factor of 2.5, so that the speed of the internal clock
is 66MHz x 2.5.
Internal clock
Also referred to as the real internal CPU clock, it is the actual internal
operating clock of the CPU. The Internal Clock is a multiple of the external
clock and of the clock multiplier factor. For instance, the Intel Pentium 90
CPU has a 60MHz external clock and its clock multiplier factor is 1.5; the
Intel Pentium P133 CPU has a 66MHz external clock and its clock
multiplier factor is 2.
Internal CPU clock = clock multiplier factor x external CPU clock
AT Bus clock
Also referred to as ISA SPEED, or AT CLOCK, or even ISA Bus clock.
Ten years ago, the original specification of AT Bus clock installed in the
first generation PC/AT computers was 8MHz, this means that there are
some interface cards which can only work at 8MHz. In order to guarantee
compatibility with older hardware, we still support 8MHz AT Bus clock,
but if your interface card is newer or faster, you can choose a higher speed
for the AT Bus clock, in order to increase the transmission rate of the
interface cards. But we recommend you not to be too ambitious. An
8MHz setup ensures maximum compatibility.
CPU Voltage - Vcore and Vio
From the voltage point of view, 586 series CPU can be divided into two
categories: single voltage CPU and dual voltage CPUs. Single voltage
CPUs include: Intel Pentium P54C series, AMD-K5 and Cyrix 6x86, etc.
Dual voltage CPUs include: Intel P55C with MMX, future AMD CPUs,
Cyrix 6x86L and M2.
The voltage of dual voltage CPUs has two components: Vcore and Vio.
Vcore provides all the power for internal processing, and its power
consumption is quite important. Vio provides the power necessary for the
external interface of the CPU.
2-14 Chapter 2
P-Rating
The P-Rating was defined by some manufacturers other than Intel to rate
the performance of their CPU in comparison with Intel Pentium CPUs. For
instance, Cyrix 6x86 P166+ has a higher actual speed compared with Intel
Pentium P166, its internal clock needs only 133MHz versus 166MHz for
Intel ’s product. The main reason is that Cyrix has improved the internal
architecture of the 6x86 CPU, which means that with the same internal
clock speed, the actual clock speed will be different.
Having read the related terminology above, please refer to the information in
appendices B, C or D for the type and specifications of your own CPU. We
suggest that you note down these specifications, which will help you when you
install the CPU.
CPU Settings:
！！CPU SOFT MENU！！
To configure the speed and the voltage of the CPU, you must enter to the CPU
SOFT MENU in BIOS Setup.
Installing the Mainboard 2-15
¯ Installing Pipeline Burst SRAM
This mainboard features a 256K or 512K cache memory. It also features a
cache memory extension socket (COAST) in order to permit you to upgrade
256K cache to 512K, and this with only one JC1 to choose from. Installation is
very easy. Refer to the table below:
Configuration
Mode 1 NO NO NO 0K OFF
Mode 2 YES NO NO 256K OFF
Mode 3 YES NO 256K module 512K ON
Mode 4 NO NO 256K module 256K OFF
Mode 5 NO NO 512K module 512K ON
Mode 6 NO YES NO 512K OFF
With 32K32
SRAM
With 64K32
SRAM
Cache socket Cache total
JC1
settings
【Notes】1. If your mainboard features a 512K cache when it is delivered
from the factory (Mode 6 in the table), the mainboard will not
have any cache extension slot (COAST) or JC1 jumper.
2. The configurations listed in the table are all the possible
configurations reserved when the board was designed. The actual
configuration when the board is delivered depends mainly on the
demands of the market.
2-16 Chapter 2
° Installing System Memory【DRAM Memory】
When this mainboard was designed, we not only have taken into account
the present needs, but we have also tried to care about demands for future
upgrades:
1. Two 168-pin DIMM sockets:
Within 3 to 5 years, you may not be able to buy 72-pin SIMM
memory modules anymore, just as now you cannot find 30-pin SIMM
memory modules anymore. If you want to extend your memory
capacity, you will have no solution other than to use 168-pin 3.3V
unbuffered DIMM sockets.
2. Four 72-pin SIMM sockets:
Currently, the most common memory modules on the market are
72-pin SIMM modules. The four 72-pin SIMM sockets of this
mainboard will meet your needs.
3. Easy installation
You just need to insert the modules, without the help of God. Isn’t it
great?
Besides the features mentioned above, you can use simultaneously 72-pin
SIMM modules and 168-pin DIMM modules, but you will rarely encounter this
kind of configuration. Before you proceed with installation, be patient, first read
what follows:
1. Factory default setting of the mainboard is for 70ns FP or EDO
modules.
If your memory modules are faster than 70ns, say 60ns or 45ns, you
can modify the BIOS settings in order to speed up the operating speed
of the system. But if you don’t want to modify these settings, or if you
don’t know how to modify them, it’s no big deal.
But if you set the external CPU clock at 66MHz or more, we
recommend you use 60ns or even faster DRAM modules.
2. Memory error check and correction feature on this mainboard.
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