i
Declaration of Conformity
According to 47 CFR, Parts 2 and 15 of the FCC Rules
The following designated product:
EQUIPMENT: MAINBOARD
MODEL NO.: 5AGM3
is a Class B digital device that complies with 47 CFR Parts 2 and 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference
that may cause undesired operation.
This declaration is given to the manufacturer:
CHAINTECH COMPUTER U.S., INC.
509 Valley Way, Milpitas, CA 95035, U.S.A.
Tel: 1-408-935-6988
Fax: 1-408-935-6989
Chaintech President: Simon Ho
Signature:
5agm3-0.p65 2000/4/11, PM 05:241
ii
Federal Communications Commission Statement
This device complies with FCC Rules Part 15. Operation is subject to the following two
conditions:
w This device may not cause harmful interference
w 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 installation. This equipment
generates, uses and can radiate radio frequency energy. If this equipment is not installed
and used in accordance with the manufacturer's instructions, it 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 interference by one or more of the
following measures:
w Reorient or relocate the receiving antenna.
w Increase the separation between the equipment and receiver.
w Connect the equipment to an outlet on a circuit different from that to which the
receiver is connected.
w Consult the dealer or an experienced radio/TV technician for help.
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.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for audio noise emissions from
digital apparatuses set out in the Radio Interference Regulations of the Canadian
Department of Communications.
Manufacturer's Disclaimer Statement
The information in this document is subject to change without notice and does not represent a
commitment on the part of the vendor. No warranty or representation, either expressed or implied,
is made with respect to the quality, accuracy or fitness for any particular purpose of this document.
The manufacturer reserves the right to make changes to the content of this document and/or the
products associated with it at any time without obligation to notify any person or organization of
such changes. In no event will the manufacturer be liable for direct, indirect, special, incidental
or consequential damages arising out of the use or inability to use this product or documentation,
even if advised of the possibility of such damages. This document contains materials protected
by copyright. All rights are reserved. No part of this manual may be reproduced or transmitted
in any form, by any means or for any purpose without expressed written consent of it's authors.
Product names appearing in this document are mentioned for identification purposes only. All
trademarks, product names or brand names appearing in this document are registered property
of their respective owners.
Printed in Taiwan
March 2000
POST-CONSUMER
RECYCLED PAPER
5agm3-0.p65 2000/4/11, PM 05:242
iii
Main Board
User's Manual
5agm3-0.p65 2000/4/11, PM 05:243
iv
Table of Contents
Chapter 1 Introduction
.........................................................................
1
1-1
Product Specifications
..........................................................
1
1-2
Package Contents
.................................................................
3
1-3
Mainboard Layout
..................................................................
4
1-4
Connector and Jumper Reference Chart
..............................
4
Chapter 2 Hardware Setup
..................................................................
5
2-1
Introduction to Jumpers
........................................................
5
2-2
Installing a PGA type CPU in a ZIF Socket
........................
6
2-3
CPU Jumper Configuration
...................................................
7
2-4
Connector and Jumper Settings
.........................................
10
2-5
Main Memory Configuration
................................................
16
Chapter 3 Award BIOS Setup Program
...........................................
19
3-1
Standard CMOS Setup
.......................................................
20
3-2
BIOS Features Setup
..........................................................
23
3-3
Chipset Features Setup
......................................................
26
3-4
Power Management Setup
..................................................
28
3-5
PnP/PCI Configuration
........................................................
32
3-6
Load Setup Defaults
............................................................
34
3-7
Integrated Peripherals
.........................................................
35
3-8
Supervisor Password & User Password Setting
...............
37
3-9
IDE HDD Auto Detection
....................................................
39
3-10
Save and Exit Setup
...........................................................
39
3-11
Exit Without Saving
............................................................
39
Chapter 4 Mainboard Software Guide
.............................................
41
Feature Explanations
Software Power-off Control
...........................................................
11
Power-On By Modem
..............................................................
11/34
Over-ride Power Button
................................................................
12
Poly-fuse Over Current Protection
...............................................
14
Memory-bus Frequency setting jumper
.......................................
16
Flash BIOS Protection
.................................................................
27
Power-On by Alarm
.......................................................................
31
Appendices
Appendix I On Board I/O Addresses & IRQ Maps
......................
43
5agm3-0.p65 2000/4/11, PM 05:254
v
-
Memo
5agm3-0.p65 2000/4/11, PM 05:255
1
Introduction
Chapter 1
Introduction
1-1 Product Specifications
r
CPU
- Supports up to 233MHz Intel Pentium processors with MMX technology
- Supports up to 533MHz AMD K6-2/ K6-2+/K6-3 processors
- 321-Pin ZIF Socket 7
- Supports 66/75/83/95/97/100MHz host frequency
- High efficiency Switching Power Module
r L2 Cache Memory
- On board 512KB Pipelined Burst SRAM with 32K*8 Tag
r Main Memory
- Three 3.3v unbuffered DIMM sockets, up to 384MB memory size
r Chipset
-VIA MVP3 VT82c598MVP/VT82c586B two chip AGPset
r
Expansion Slots
- One 124-pin AGP slot (v1.0 2X compliant)
- Three 32-bit PCI slots ( v2.1 compliant)
- Three 16-bit ISA slots (one PCI/ISA shared slot)
r
1Mb Boot Block Flash BIOS
- Award System BIOS, supports PnP(v1.0a), APM(v1.2), DMI(v2.0) & Multi-
device booting (including floppy, IDE/SCSI hard drive, LS120, ZIP ATAPI,
ACPI, etc.) features
- Includes Trend ChipAway Virus for a virus-free system boot-up
5agm3-1.p65 2000/4/11, PM 05:261
2
Chapter 1
r
On Board Super I/O
- One floppy disk drive connector supports up to 2.88MB, Japanese 3 Mode,
and 1Mbps transfer rates
- One Standard SPP/ECP/EPP parallel port
- Two 16550A compliant serial ports
- Supports HPSIR (up to 115.2Kbps) and ASKIR(Amplitude Shift Keyed)
function
- Integrated PS/2 Keyboard and mouse controller
r
Two Ultra DMA-33 IDE Ports
- Supports up to PIO Mode 4, Multi-word DMA Mode 2 & Ultra DMA-33
timings
- Complete Bus Master Drivers for well-known multi-tasking operating systems
r
I/O Connector
- Supports AT keyboard connector (shared with PS/2 keyboard and mouse
connector for alternate optional)
- Two IDE ports
- Two Serial ports
- One Printer port
- One Floppy port
- I/O port header including two USB port, PS/2 mouse port and Infrared port
r
Embedded USB controller
- USB v1.1 and Intel UHCI v1.1 compliance
- Supports root hub and four USB ports
r
Board Dimension
- Baby-AT form factor, 221mm x 241mm, 4-layer PCB
r
Advanced Management Features
- Power on events: Modem ring, RTC alarm
- Flash BIOS protection
- Supports Over-ride power button
- Software power off control for Win98
- Suspend blinking LED
5agm3-1.p65 2000/4/11, PM 05:262
3
Introduction
1-2 Package Contents
This product comes with the following components:
r One mainboard
r One 9-pin serial port and 25-pin parallel port ribbon cable with bracket
(Figure 1-1)
r One 25-pin serial port ribbon cable with bracket (Figure 1-2)
r One 40-pin IDE connector ribbon cable (Figure 1-3)
r One 34-pin floppy disk drive ribbon cable (Figure 1-4)
r Optional USB kit with PS/2 mouse, infrared and two USB ports (Figure 1-5)
r One User's Manual
r One CD-ROM disk that includes
- Acrobat Reader
- Award Flash EPROM Utility
- Award DMI Utility for DOS
- VIA Service Pack for Win9x/WinNT including Bus Master IDE drivers,
AGP VxD and etc.
- Optional AIRBAG2000 software group including Sheperd2000, Trend
PC-cillin, Norton AntiVirus, ADOBE ActiveShare, Appio and X-stop
Serial port
Figure 1-2
Figure 1-3
IDE cable
Figure 1-4
Standard floppy cable
Serial port
Parallel port
Figure 1-1
Figure 1-5 optional USB Kit
5agm3-1.p65 2000/4/11, PM 05:263
4
Chapter 1
1-3 Mainboard Layout
1-4 Jumper and Connector Reference Page Chart
Jumper &
Connector No.
Function Page
JP1 AT/ATX power supply selector 10
JP2 Clear CMOS data jumper 11
JP4 CPU voltage jumper 8/9
JP5-7 System frequency jumper 7
JP8-10 System frequency ratio jumper 7
JPII Memory bus frequency setting jumper 16
CN3 AT power supply connector 10
CN4 Infrared/PS/2 mouse/ USB kit connector 14/15
CN5
Keyboard lock and power indicator LED connector 12
System reset switch connector 13
Speaker connector 13
Hard disk activity LED connector 13
Green switch/Green LED connector 13
Turbo LED connector 13
Over-ride power button connector 12
CN7 ATX power supply connector 10
SYSFAN System cooling fan connector 11
CPUFAN CPU cooling fan connector 11
5agm3-1.p65 2000/4/11, PM 05:264
5
Hardware Setup
A cap over pin 1 and
pin 2 shorts these pins
Pins SettingCap
A 3-pin jumper
1
1
Figure 2-1
Chapter 2
Hardware Setup
If your mainboard has already been installed in your computer you may still need
to refer to this chapter if you plan to upgrade your system's hardware.
Be sure to disconnect the power cable from the power source before performing
any work on your mainboard, i. e. installing a CPU, memory module, changing
a jumper setting, etc. Not doing so may result in electrical shock!
2-1 Introduction to Jumpers
Jumpers are used to select between various operating modes. A jumper consists of
a row of gold colored pins that protrude from the surface of the mainboard. It is
important not to confuse jumpers with connectors or headers.
Putting jumper caps on anything that is not a jumper may result in damaging
your mainboard. Please refer to Section 1-3, Mainboard Layout, for the location
of jumpers on your mainboard.
As indicated in Figure 2-1 below, a cap is used to cover the pins of a jumper, resulting
in shorting those pins that it covers. If the cap is removed from the top of the pins,
the jumper is left "open." The number 1 shown both in the diagram below and in
all multiple pin jumper and header diagrams in this manual indicates the pin designated
with the number 1. The numbering of the remaining pins follows in sequence.
5agm3-2.p65 2000/4/11, PM 05:495
6
2-2 Installing a PGA type CPU in a ZIF Socket
The Intel Socket 7, designed for the Pentium processor, has been incorporated as
a standard mainboard specification and is compatible with AMD and Cyrix CPUs. To
insert your CPU into Socket 7 please do the following:
1. Locate a small dot marked on the top surface of the CPU close to one if it's corners.
The same corner will also be cut off, leaving a noticeable notch in the CPU's corner.
These markings indicate Pin 1 of the CPU. See Figure 2-2.
2. Pull up the lever of Socket 7 so that it is perpendicular with the surface of the
mainboard. Gently insert the CPU with Pin 1 at the same corner of Socket 7 that
contains the end of the lever. Allow the the weight of the CPU to push itself into
place. Do not apply extra pressure as doing so may result in damaging your CPU.
Snap the lever back into place. See Figure 2-3.
Installing a heat sink and cooling fan on top of your CPU is necessary for
proper heat dissipation. Failing to install these items may result in overheating
and possible burn-out of your CPU.
Pin 1
Lever
Socket 7
Figure 2-3 Inserting a CPU into Socket 7
Figure 2-2 The markings on top of a CPU
5agm3-2.p65 2000/4/11, PM 05:496
7
Hardware Setup
2-3 CPU Jumper Configuration
Frequency Configuration
If you install a CPU on this mainboard, you must set JP5-7 for System Frequency
and JP8-10 for CPU Bus Frequency Ratio. See Figure 2-4 CPU/System Frequency
Jumper Settings.
CPU Bus Frequency & Frequency Ratio Configuration
* CPU Speed = Frequency ratio x System Frequency
JP5~JP7 JP8~JP10
Figure 2-4 System Frequency Jumper Settings
1
+
1
1
1
+
+
1
1
PCI Frequency & AGP Frequency
1
1
1
1
1
1
1
1
1
1
1
1
1
1
System
Freq.
JP5 ~ JP7
66
75
83
95/97
100
Freq.
Ratio
JP8 ~ JP10
x 1.5
x 2.0
x 2.5
x 3.0
x 3.5
x 4.0
x 4.5
x 5.0
x 5.5
System Freq. (MHz) PCI Freq. (MHz) AGP Freq. (MHz)
66 33 66
75 37.5 75
83 33 66
95 31.75 63.5
100 33 66
5agm3-2.p65 2000/4/11, PM 05:497
8
Overclocking
Operating a CPU at a higher frequency than it's specification allows is called
overclocking. If the CPU frequency is set at a higher frequency than its specification
allows, it may or may not run at that freqency, depending on the quality of your CPU
and the extent to which the frequency has been overset. The mainboard manufacturer
highly discourages overclocking as it may result in data loss, CPU burn-out, system
failure, etc.
Voltage Configuration
There are two major processor types in general use--single and dual voltage processors.
Most single voltage processors such as Pentium, AMD-K6 and Cyrix 6x86 processors
use a single voltage value of 3.5v for both core and I/O voltage settings. Most dual
voltage processors such as Pentium processors with MMX technology and Cyrix
6x86L processors use a dual voltage value of 2.8v for core and 3.3v for I/O voltage
settings. To make the voltage setting for single and dual voltage processors, simply
set JP4 according to the table on the next page. The voltage range supported by
this mainboard is detailed in Figure 2-5 below.
Figure 2-5 Voltage Jumper Settings
1
1
1
1
1
1
Vcore JP4
2.2V
2.3V
2.4V
2.5V
2.8V
2.9V
3.2V
3.3V
3.5V
1
1
1
5agm3-2.p65 2000/4/11, PM 05:498
9
Hardware Setup
1
1
1
1
1
1
CPU Type
CPU Power Voltage System Freq. Freq. Ratio
I/O Vcc
Core
Vcc
JP4 MHz
JP5
~ JP7
Speed
rate
JP8~
JP10
Intel
Pentium
w/MMX
@200MHz
3.3 2.8 66
x 3.0
Pentium
w/MMX
@233MHz
x 3.5
AMD
K6-2/350
3.3
2.2
100
x 3.5
K6-2/400
x 4.0
K6-2/450
x 4.5
2.4
K6-2/475
95
x 5.0
K6-2/500
2.2
100
2.4
K6-2/533
2.2 97
x 5.5
K6-2/550
2.3
100
K6-3/400
2.4
x 4.0
K6-3/450
x 4.5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Note:
For 97MHz FSB setting, you must first set system frequency to 95MHz (JP5-JP7) and boot
the system. Press the Delete key to enter the Award BIOS setup program. Select the Chipset
Features option from the Standard CMOS Features menu. At the CPU Clock/PCI Clock
function select the 97/32MHz. option.
5agm3-2.p65 2000/4/11, PM 05:499
10
2-4 Connector and Jumper Settings
Connectors are used to link the system board with other parts of the system, including
the power supply, the keyboard, and the various controllers on the front panel of
the system case.
AT/ATX Power Supply Selector (JP1)
This mainboard supports two kinds of power connectors
and requires a power supply of at least 200 watts. If you
want to use an AT power supply, short pins 1 and 2 with the
jumper cap. If you want to use an ATX power supply, short
pins 2 and 3 with the jumper cap.
AT Power Supply Connector (CN3)
Most power supplies have two sets of six-wire leads.
Making sure the black wires of each lead are in the center,
plug both leads into the AT power supply connector. The
power supply requirement is as follows:
ATX Power Supply Connector (CN7)
The ATX power supply provides a single 20-pin connector
interface which incorporates standard +/-5V, +/-12V,
optional 3.3V and soft-power signal.
The Soft-power signal, a 5V trickle supply of at least 10mA,
is continuously supplied when AC power is available.
When the system is in the Soft-Off mode, this trickle supply
maintains the system in it's minimum power state.
1 1
AT Power ATX Power
1
+
1
1
1
+
+
1
1
JP1
CN3
CN7
5agm3-2.p65 2000/4/11, PM 05:4910
11
Hardware Setup
Software Power-Off Control
This mainboard can be powered down using theWindows 95 Software Power-Off
function. To power down your computer, click the START button on the Windows 95
task bar. Select "Shut Down The Computer" and the system turns off. The message "It
is now safe to turn off your computer" will not be shown when using this function.
Power-On By Modem
While in Soft-off state, if an external modem ring-up signal occurs, the system turns on
and can be remotely accessed. Please enable the Power on by Modem function in
BIOS's Power Management menu to activate this function.
CPU/System Cooling Fan
Connectors
(CPUFAN/SYSFAN)
These added connectors allow the fans to draw their
power from the mainboard instead of the disk drive
connector. These fan connectors are available because
some systems have all the disk drive power connectors in
use.
Clear CMOS Data Jumper (JP2)
To clear the contents of the CMOS, please follow the
steps below.
1. Disconnect the system power supply from the power
source.
2. Set the jumper cap at location 2~3 for 5 seconds, then
set back to the default position.
3. Connect the system's power and then start the system.
4. Enter BIOS, load the setup default settings in the
CMOS Setup Utility Menu and then set the system
configuration in the Standard CMOS Setup menu.
Default Clear CMOS Data
1
1
1
+
1
1
+
+
1
1
CPU FAN
1
+
1
1
+
+
1
1
SYS FAN
5agm3-2.p65 2000/4/11, PM 05:5011
12
Front Panel
Connector
Set (CN5) A through G
A. Over-ride Power Button
Connector
The power button on the ATX chassis can be used as a
normal power switch as well as a button to activate
Advanced Power Management Suspend mode. This
mode is used for saving electricity when the computer is
not in use for long periods of time. The Soft-OFF by
PWRBTN function in BIOS's Power Management Setup
must set to "Delay 4 Sec." to activate this function.
When the Soft-off by PWRBTN function is enabled, pushing
the power button rapidly will switch the system between
Full-On and Suspend mode. Pushing the button rapidly
again or any occurence of external activity such as pressing
a key on the keyboard will bring the system back to Full-On.
Pushing the button while in Full-On for more than 4 seconds
will switch the system to Soft-off and pushing the button
again rapidly will turn the system back to Full-on. See Override Power Button Operation diagram.
B. Keyboard Lock & Power Indicator LED
Connector
Plugging this connector into the lock on the front panel
of the system case allows the lock to enable or disable
the keyboard. This function provides limited security
against casual intruders. The power indicator LED shows
the system's power status and willl flash when the system
is in Green mode (Suspend).
C. Green Switch/Green LED Connector
Over-ride Power
Button Operation
Pin Definition
1 +5V DC
2 Not Connected
3 Ground
4 Keylock
5 Ground
Keyboard Lock
Power indicator LED
1
+
1
1
1
+
+
1
1
5agm3-2.p65 2000/4/11, PM 05:5012
13
Hardware Setup
Some ATX cases provide a Green switch which is used to
put the system in Suspend mode. In suspend mode, the
power supply to the system is reduced to a trickle, the
CPU clock is stopped, and the CPU core is in it's minimum
power state. The system is woken up whenever the
keyboard or mouse is touched or the Green button is
pressed again. The system resumes in different ways as
defined by "Power Management Setup" screen in BIOS.
D. Speaker
Connector
E. System Reset Switch Connector
This connector should be connected to the reset switch
on the front panel of the system case. The reset switch
allows you to restart the system without turning the
power off.
F. IDE Activity LED
Connector
The IDE activity LED lights up whenever the system
reads/writes to the IDE devices.
G. Turbo LED
Connector
This mainboard does not have turbo/de-turbo speed
mode. Even though this function does not exist, the turbo
LED will light when the LED is connected and the turbo
button is pressed.
Pin Definition
1 Speaker Signal
2 GND
3 GND
4 +5V DC
Pin Definition
1 System
2 GND
5agm3-2.p65 2000/4/11, PM 05:5013
14
AT Keyboard Connector
Poly-fuse Over Current Protection
The poly-fuse protects the system from dangerous voltages the system might be
exposed to via the keyboard connector. In case of such exposure, the poly-fuse will
immediately be disconnected from the circuit, just like a normal fuse. After being
disconnected for a certain period of time, the poly-fuse will return to its normal state,
after which the keyboard can function properly. Unlike conventional fuses the poly-
fuse will not have to be replaced, relieving the user wasted time and inconvenience.
Optional USB Kit Connector (CN4) A through C
The USB Kit connector is a combination of of USB, PS/2
mouse, and Infrared functions grouped on the same
connector. The USB Kit is installed in a back panel of
the chassis and is connected to the USB Kit connector
with an 18-pin cable.
A. Infrared Connector
If the IR Address Select function in BIOS's Integrated
Peripherals menu is not set at disabled, the COM2 port
will support IR functions.
Keyboard Connector/Pin Definitions
Pin Definition
1 Keyboard Clock
2 Keyboard Data
3 (None)
4 Ground
5 +5V DC
Pin Definition
1 Ir-Tx
2 Ir-Rx
3 Not Connected
4 Vcc (+5V)
5 GND
6 Not Connected
7 Not Connected
8 Not Connected
1
+
1
1
+
+
1
1
PS/2 Mouse Port
1
+
1
1
1
+
+
1
1
5agm3-2.p65 2000/4/11, PM 05:5014
15
Hardware Setup
B. PS/2 Mouse Connector
If a PS/2 mouse is used, BIOS will automatically detect
and assign IRQ12.
C. Dual Channel USB(Universal Serial Bus)
Connector
Enable the OnChip USB function in BIOS's Integrated
Peripherals Menu if you want to use a USB keyboard.
Other USB devices do not require the enabling of this
function. USB is an open industry standard, providing
a simple and inexpensive way to connect up to 125
devices to a single computer port. Keyboards, mice,
tablets, digitizers, scanners, bar-code readers, modems,
printers and many more can all be used at the same time.
USB is a dynamically reconfigurable serial bus with an
elementary data rate of 12Mbps, based on off the shelf,
low cost micro-controller technology. It's modular layered
software protocol supports sophisticated devices and
application programs.
This board contains a USB Host controller and includes
a root hub with two USB ports (meets USB Rev 1.0 spec.).
Two USB peripherals or hub devices are able to be
connected.
132
5
4
6
Pin Definition
1 Data
2 Not Connected
3 Ground
4 +5V (fused)
5 Clock
6 Not Connected
Optional USB Kit
5agm3-2.p65 2000/4/11, PM 05:5015
16
2-5 Main Memory Configuration
The DRAM memory system on board consists of 3 banks, and the memory range is
8 ~ 384 MBytes.
Memory-bus Frequency Setting Jumper (JP11)
This setting is only relevant when SDRAM-DIMM is used.
1~2 short (default): Synchronous mode
Memory-bus speed = CPU-bus speed
2~3 short: Asynchronous mode
Memory-bus speed = AGP-bus speed
(see details in section 2-3)
@
When synchronous mode cannot be used due to
speed limitations of your SDRAM modules.
DRAM Specifications
Types Supported Synchronous DRAM
Speed requirement SDRAM: 10/12ns
Module types & sizes 8/16/32/64/128 MBytes, single/double-sided, 3.3v DIMM
Parity Both parity and non-parity modules may be used.
1
+
1
1
+
+
1
1
1
1
System
Frequency
SDRAM Type Max Memory
4 unbuff ered DIMM Modules
66MHz 12ns or faster
384MB
100MHz 10ns or faster
1 384
DIMM1 Bank0
DIMM2 Bank1
DIMM3 Bank2
5agm3-2.p65 2000/4/11, PM 05:5016
17
Hardware Setup
This mainboard supports 3.3v, unbuffered, 4-clock, SDRAM DIMM only,
Buffered, 5V, or 2-clock SDRAM DIMMs should not be used.
This board has DIMM (Dual-in-line Memory Module) sockets to support
SDRAM type DRAM and has the better optimized read timings (7-1-1-1).
The DIMM sockets will quickly replace SIMM as the next module standard
for the PC industry and will become the memory subsystems standardized 64bit data interface. Recently, JEDEC committee passed the unbuffered DIMM
pinout specification as a standard for higher speed transfer. The unbuffered
DIMM allows for SDRAM and FPM DRAM compatibility as well as pinouts
for x64, x72 with parity, x72 with ECC and x80 ECC. The unbuffered DIMM is
distinguished by the keyed notch lying to the right of the centerline of the
DRAM key position as shown in the figure below.
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18
-
Memo
5agm3-2.p65 2000/4/11, PM 05:5018
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