Abit AR5E User Manual
Table of Contents
Chapter 1 Introduction of AR5 Features
¬ Specifications..................................................................... 1-2
- Layout diagram..................................................................1-4
® System block diagram......................................................... 1-5
Chapter 2 Installing the Mainboard
¬ Standard External Connectors............................................2-3
- Jumpers and Switches.......................................................2-10
® Presentation and Installation of the CPU...........................2-11
¯ Installing System Memory
¡i
DRAM Memory¡j...........2-14
Chapter 3 Introduction of BIOS
¬ CPU setup ¡i CPU SOFT MENU™¡j .............................3-3
- Standard CMOS Setup Menu............................................. 3-9
® BIOS Features Setup Menu..............................................3-11
¯ Chipset Features Setup Menu...........................................3-17
° Power Management Setup Menu......................................3-19
± PCI & Onboard I/O Setup................................................3-23
² Load BIOS Defaults.........................................................3-28
³ Load Setup Defaults......................................................... 3-28
´ Password Setting..............................................................3-29
µ IDE HDD Auto Detection................................................3-30
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
Part No:MN-086-B21-21 Rev:1.01
Appendix F Technical Support
Introduction of AR5 Features 1-1
Chapter 1 Introduction of AR5
Features
The AR5 have 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.
The AR5 uses SOFT MENU™ 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 AR5 uses Intel 430VX 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.
The AR5 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 AR5’s unique CPU operating frequency and voltage setup feature in order to
meet modern computing demands.
1-2 Chapter 1
¬
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
100MHz
l Supports all Cyrix sixth generation 6x86™ CPUs: P120+, P133+,
P150+, P166+, P200+
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)
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
6. System BIOS
l AWARD BIOS
l Supports Plug-and-Play (PnP)
l Supports Advanced Power Management (APM)
l Supports Desktop Management Interface (DMI)
Introduction of AR5 Features 1-3
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 ATX 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
-
Layout diagram
Fig 1-1 Layout diagram
Introduction of AR5 Features 1-5
®
System block diagram
Pen tium Processor
Host BUS
CACHE
(SRAM)
PCI BUS
CD ROM &
Hard Disk
TAG
Second
Lev el Cache
Ctrl
Tag Ctrl
TIO [0..7]
Fast
IDE
PIIX3
TVX
Universal Serial Bus
Addr
Ctrl
USB
3.3V
Main
Memory
(DRAM)
Plink
TXD Ctrl
Control
Address/Data
USB
Control
Address
Data
Data
PCI Device(s)
ISA Device(s)
TDX
ISA BUS
Serial
ALi
M5123
Fig. 1-2 System block diagram
LPT
FDC
1-6 Chapter 1
Installing the Mainboard 2-1
Chapter 2 Installing the Mainboard
This AR5 mainboard 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 Presentation and Installing of the CPU.
• 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
Knowledge
¬
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.
J6 - 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 J6 connector pins on the mainboard.
Pin number Name or significance of signal
20 +5VDC
19 No connection
18 Ground
17 Keyboard inhibit Signal
16 Ground
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.
2-4 Chapter 2
J6 - Hardware Suspend switch
There is no specific orientation. Connect the two-thread hardware suspend
plug to the J6 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
7 Suspend
6 Ground
J6 - Hardware Reset connector
There is no specific orientation. Connect the two-thread hardware reset cable
to the J6 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.
J6 - Speaker connector
There is no specific orientation. Connect the four-thread speaker cable to the
J6 connector pins on the mainboard.
Pin number Name or significance of signal
11 +5VDC
12 Ground
13 Ground
14 Sound Signal
Installing the Mainboard 2-5
J6 - Turbo switch LED connector
This connector has a specific orientation. Connect the two-thread turbo switch
LED plug to the J6 connector pins on the mainboard.
Pin number Name or significance of signal
9 Anode terminal of Turbo LED
8 Cathode terminal of Turbo LED
Computer
knowledge
The “hardware Turbo LED” indicates the status of hardware
operating speed.
J5 - 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 signifigance of signal
1 LED’s Cathode
2 LED’s Anode
3 LED’s Anode
4 LED’s Cathode
2-6 Chapter 2
JP10 - 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
1 Standby power supply ¡i+5VSB ¡j
2 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 the ATX power
connector J3 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.
JP1 - CPU Fan power connector
This has a specific orientation. Connect the three-threads CPU fan cable to the
JP1 connector.
Pin number Name of the signal or signification
1 Ground
2 +12V
3 Ground
Installing the Mainboard 2-7
J1 - 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 J1 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
knowledge
The “PS/2 Mouse Port” is different from COM1 or COM2 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.
J2 - PS/2 Keyboard Connector
This has an orientation pin. Connect your keyboard connector to the J2
connector on the mainboard.
Pin number Name of the signal or signification
1 Keyboard data
2 No connection
3 Ground
4 +5VDC
5 Ground
6 Keyboard clock
2-8 Chapter 2
J4 - 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 Ground 12 +5VDC
Name of the signal or
signification
Pin number
Name of the signal or
signification
J3 - ATX Power input Connectors
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 connector of the power supply unit to
the J3 connectors on the mainboard.
Pin number
1 +3.3VDC 11 +3.3VDC
2 +3.3VDC 12 -12VDC
3 Ground 13 Ground
4 +5VDC 14 PS_ON
5 Ground 15 Ground
6 +5VDC 16 Ground
7 Ground 17 Ground
8 POWERGOOD 18 -5VDC
9 +5VDC 19 +5VDC
10 +12VDC 20 +5VDC
Name of the signal or
signification
Pin number
Name of the signal or
signification
Installing the Mainboard 2-9
JP7 - Infrared remote Connectors 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
JP6 : 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.
JP9 : ATX Power select Power ON/OFF
(Pin1-2): High active
(Pin2-3): Low active
This jumper is set on pins 1 and 2 at the factory.
Installing the Mainboard 2-11
®
Presentation and Installation of the CPU
Jumperless Mainboard (Mainboard with no DIP Switch or Jumper)
The AR5 mainboard 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 the AR5 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.
The AR5 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 multiplier
factors.
2-12 Chapter 2
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.
Installing the Mainboard 2-13
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:
¡I¡I
To configure the speed and the voltage of the CPU, you must enter to the CPU
SOFT MENU in BIOS Setup.
CPU SOFT MENU
¡I¡I
2-14 Chapter 2
¯
Installing System 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:
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?
¡i
DRAM Memory
¡j
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 do not support this feature on
this mainboard.
Since the Intel 430VX chipset does not support this feature, since the
memory error check and correction feature may not be effective, and
since you cannot easily find memory modules with memory check and
correction feature, this mainboard does not support it.
Installing the Mainboard 2-15
3. Maximum memory capacity 128M Bytes supported by this
mainboard.
¡i
Computer
knowledge
Relationships between memory modules and Pentium
CPUs
Pentium, 6x86 and AMD-K5 are all 64 bit CPUs, but 72-pin
SIMM modules are only 32-bit. That’s why they have to be used
in pairs, because the CPU will always be only able to see 64 bits.
This means that 72-pin SIMM modules have to be installed in
pairs. For instance, SIMM1 and SIMM2 must form a pair, and
SIMM3 and SIMM4 must form another pair. Of course, the two
members of a pair must be of the same kind ¡i EDO or FP
DRAM ¡j, and you cannot use pairs from different “species”.
But the AR5 support different “pairs” and use different type of
memory modules, notice:
¡j
l ¡i SIMM1 and SIMM2 ¡j must use the same memory
type, as well as ¡i SIMM3 and SIMM4 ¡j.
l ¡i SIMM1 and SIMM2¡juse the same memory type, and
¡i SIMM3 and SIMM4 ¡j can use the same type, or a
different type, in order to permit you to obtain the best
speed configuration for each “single” pair, and to make
the system work at its maximum capacity. If one
memory pair is slower, it will have no influence on the
pair whose speed is higher.
166-pin DIMM modules are 64 bit, so you can use single modules.
On the AR5 mainboard, these modules can support not only EDO
and FR DRAM, but also Synchronous DRAM memory
configurations. The AR5 mainboard does not support SDRAM.
When you install DIMM modules on the mainboard, you don’t have to setup
anything, just be sure that you use 3.3V unbuffered 168-pin DIMM modules, and
insert them in the memory socket.
2-16 Chapter 2
¡i
Computer
Knowledge
After installing the DRAM, the BIOS of the mainboard will automatically
detect the size of the memory installed on the mainboard. Below is a list of all the
possible situations:
168-pin DIMM modules specifications
According to the standards defined by JEDEC, there are a lot of
different types of specifications for 168-pin DIMM sockets. Here
are the possible types:
l 3.3V UNBUFFERED DIMM
l 3.3V BUFFERED DIMM
l 5V UNBUFFERED DIMM
l 5V BUFFERED DIMM
These types of DIMM modules differ not only by the electrical
design, but also by their architecture. So, if you buy different
types of DIMM modules, you will not be able to insert them in the
DIMM sockets. Currently, the standard for PC is 3.3V
UNBUFFERED DIMM, which is the standard supported by this
series.
¡j
Scenario 1: You use only 72-pin SIMM modules:
l
The maximum memory size is 128M bytes.
l
Support possible for single density or double density memory
modules.
l Memory modules supported: 1Mx32 ¡i 4M ¡j, 2Mx32
¡i 8M ¡j, 4Mx32 ¡i 16M ¡j or 8Mx32 ¡i 32M ¡j.
l ¡i SIMM1 and SIMM2 ¡j is the first pair, ¡i SIMM3 and
SIMM4 ¡j is the second pair. Usually, you first insert the first
pair, than the second pair, but it is possible to do the reverse.
l
You can also directly refer to table 2-1.
Scenario 2: You use only 168-pin DIMM modules:
l
The maximum memory size is 128M bytes.
l
Support possible for single density or double density memory
modules.
l Memory modules supported: 1Mx64 ¡i 8M ¡j, 2Mx64
¡i 16M ¡j or 4Mx64 ¡i 32M ¡j.
Installing the Mainboard 2-17
l
DIMM1 is the first pair, DIMM2 is the second pair. Usually,
you first insert modules in DIMM1 socket, than in DIMM2
socket, but it is possible to do the reverse.
l You can also directly refer to table 2-2.
Scenario 3: You use 72-pin SIMM modules and 168-pin DIMM modules:
l The maximum memory size is: 128M Bytes.
l
Support possible for single density or double density memory
modules.
l Memory modules supported: Refer to case 1 and case 2 above.
l Support possible for mixed use of single density and double
density modules.
l Since there is a lot of possible configurations, no table is given.
2-18 Chapter 2
Table 2-1 72-pin SIMM Module Installation
¡i SIMM1, SIMM2 ¡j ¡i SIMM3, SIMM4 ¡j
1st pair ¡i or 2nd pair ¡j 2nd pair ¡i or 1
No
module
inserted
1Mx32 ¡i 4Mx2 ¡j
2Mx32 ¡i 8Mx2 ¡j
4Mx32 ¡i 16Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
Since the installation described above is valid for the first pair as well as for the second pair, it will not be repeated.
1Mx32 ¡i 4Mx2 ¡j 2Mx32 ¡i 8Mx2 ¡j
2Mx32 ¡i 8Mx2 ¡j 2Mx32 ¡i 8Mx2 ¡j
4Mx32 ¡i 16Mx2 ¡j 2Mx32 ¡i 8Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j 2Mx32 ¡i 8Mx2 ¡j
1Mx32 ¡i 4Mx2 ¡j
2Mx32 ¡i 8Mx2 ¡j
4Mx32 ¡i 16Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
inserted 32MB
1Mx32 ¡i 4Mx2 ¡j
4Mx32 ¡i 16Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
1Mx32 ¡i 4Mx2 ¡j
4Mx32 ¡i 16Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
1Mx32 ¡i 4Mx2 ¡j
4Mx32 ¡i 16Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
1Mx32 ¡i 4Mx2 ¡j
4Mx32 ¡i 16Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
st
pair ¡j
No 8MB
module 16MB
Total memory size
8MB
16MB
32MB
64MB
64MB
16MB
24MB
40MB
72MB
24MB
32MB
48MB
80MB
40MB
48MB
64MB
96MB
72MB
80MB
96MB
128MB
Perhaps you have already found out the rules from the table above. This table,
we belive, contains all possible configurations. In fact, you just need to insert
two or four 72-pin SIMM modules in the socket to complete the installation.
Installing the Mainboard 2-19
Table 2-2 168-pin DIMM Module Installation
¡i DIMM1 ¡j ¡i DIMM2 ¡j
1st pair ¡i or 2nd pair ¡j 2nd pair ¡i or 1st pair ¡j
No
module
inserted
1Mx64 ¡i 8M ¡j
2Mx64 ¡i 16M ¡j
4Mx64 ¡i 32M ¡j
Since the installation described above is valid for the first pair as well as for the second pair, it will not be
repeated.
1Mx64 ¡i 8M ¡j 2Mx64 ¡i 16M ¡j
2Mx64 ¡i 16M ¡j 2Mx64 ¡i 16M ¡j
4Mx32 ¡i 32M ¡j 2Mx32 ¡i 8Mx2 ¡j
1Mx64 ¡i 8M ¡j
2Mx64 ¡i 16M ¡j
4Mx64 ¡i 32M ¡j
No 8MB
module 16MB
inserted 32MB
1Mx64 ¡i 8M ¡j
4Mx64 ¡i 32M ¡j
1Mx64 ¡i 8M ¡j
4Mx64 ¡i 32M ¡j
1Mx32 ¡i 4Mx2 ¡j
4Mx32 ¡i 16Mx2 ¡j
Total memory size
8MB
16MB
32MB
16MB
24MB
40MB
24MB
32MB
48MB
40MB
48MB
64MB
In fact, the table above shows that you just need to insert the DIMM module in
any of the two sockets to complete the installation of the memory.
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