AOpen AK77PROA133 User Manual
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a
Overview
AK77 Pro(A)-133 / AK77 Plus(A)-133
DOC. NO.: AK77PA133-OL-E0112A
1
Installation
Hardware
Drivers &
Utilities
BIOS Setup
AWARD
Glossary
Troubleshooting &
Technical Support
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WWhhaatt’’ss iinn tthhiiss mmaannuuaall
AK77 Pro(A)-133 / AK77 Plus(A)-133....................................................................................................1
What’s in this manual ......................................................................................................................................................2
You Must Notice ..............................................................................................................................................................9
Before You Start............................................................................................................................................................10
Overview .......................................................................................................................................................................11
Feature Highlight...........................................................................................................................................................12
Quick Installation Procedure..........................................................................................................................................17
Motherboard Map ..........................................................................................................................................................18
Block Diagram ...............................................................................................................................................................19
Hard war e Ins tal lat ion..................................................................................................................20
Clear CMOS Data ..........................................................................................................................................................21
CPU Installation ............................................................................................................................................................. 22
JP21 FSB/PCI Clock Ratio ............................................................................................................................................ 24
CPU Jumper-less Design............................................................................................................................................... 25
CPU and Housing Fan Connector (with H/W Monito ring) ...............................................................................................3 0
DIMM.............................................................................................................................................................................31
System and RAM Power Indicate LED ...........................................................................................................................33
Front Panel Connector ..................................................................................................................................................34
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ATX Power Connector ...................................................................................................................................................35
AC Power Auto Recovery ..............................................................................................................................................3 6
JP28 Keyboard Wake-up...............................................................................................................................................36
IDE, Floppy and IDE RAID (AK77 Plus(A)-133 Only) Connector ...................................................................................37
IDE RAID Controller (AK77 Plus(A)-133 Only)............................................................................................................... 39
IrDA Connector ..............................................................................................................................................................40
WOM (Zero Voltage Wake on Modem) Connector.........................................................................................................41
WOL (Wake on LAN).....................................................................................................................................................4 4
AGP (Accelerated Graphic Port) Expansion Slot ...........................................................................................................46
CNR (Communication and Network Riser) Expansi on Slot ............................................................................................47
PC99 Color Coded Back Panel......................................................................................................................................48
Support 2
Chassis Intrusion Sensor...............................................................................................................................................50
CD Audio Connector......................................................................................................................................................51
Modem Audio Connector ............................................................................................................................................... 5 2
AUX-IN Connector.........................................................................................................................................................53
Front Audio Connector...................................................................................................................................................54
Die-Hard BIOS (100% Virus Protection, Upgrad e Optional) ...........................................................................................55
Dr. LED Connector (Upgrade Optional).........................................................................................................................58
nd
USB Port.....................................................................................................................................................49
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Battery-less and Long Life Design.................................................................................................................................60
Over-current Protection .................................................................................................................................................61
Hardware Monitoring .....................................................................................................................................................62
Resettable Fuse ............................................................................................................................................................63
2200μF
Layout (Frequency Isolation Wall) .................................................................................................................................65
Fansink on North Bridge................................................................................................................................................66
Low ESR Capacitor......................................................................................................................................... 64
Driver and Utility..........................................................................................................................67
Auto-run Menu from Bonus CD Disc..............................................................................................................................68
Installing Windows 95....................................................................................................................................................69
Installing Windows 98....................................................................................................................................................70
Installing Windows® 98 SE, Windows® ME & Wi n dow s
Installing VIA 4 in 1 Driver............................................................................................................................................. 7 2
Installing Onboard Sound Driver....................................................................................................................................73
Install Onboard IDE RAID Driver (AK77 Plus(A)-133 Only) ...........................................................................................74
Install FastCheck™ Monitoring Utility (AK 77 Plus(A)-1 33 Only) .................................................................................... 7 4
Installing Hardware Monitoring Uti lity ............................................................................................................................75
ACPI Suspend to Hard Drive......................................................................................................................................... 76
ACPI Suspend to RAM (STR)........................................................................................................................................81
®
2000......................................................................................... 71
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AWARD BIOS ................................................................................................................................ 8 3
How To Use Award™ BIOS Setup Program...................................................................................................................8 4
How To Enter BIOS Setup ............................................................................................................................................. 86
BIOS Upgrade ...............................................................................................................................................................87
Overclocking ................................................................................................................................ 8 9
VGA Card & Hard Disk ..................................................................................................................................................90
Glossary .......................................................................................................................................91
AC97 .............................................................................................................................................................................91
ACPI (Advanced Configuratio n & Power Interfac e) ........................................................................................................91
AGP (Accelerated Graphic Port)....................................................................................................................................91
AMR (Audio/Modem Riser)............................................................................................................................................92
AOpen Bonus Pack CD .................................................................................................................................................92
APM (Advanced Power Management)........................................................................................................................... 92
ATA (AT Attachment)......................................................................................................................................................92
ATA/66...........................................................................................................................................................................92
ATA/100......................................................................................................................................................................... 93
BIOS (Basic Input/Output Sys tem) ................................................................................................................................93
Bus Master IDE (DMA mode).........................................................................................................................................93
CNR (Communication and Networki ng Riser)................................................................................................................9 3
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CODEC (Coding and Decoding) ....................................................................................................................................94
DDR (Double Data Rate) SDRAM..................................................................................................................................94
DIMM (Dual In Line Memory Module) ............................................................................................................................94
DMA (Direct Memory Access) ........................................................................................................................................ 94
ECC (Error Checking and Correction)............................................................................................................................95
EDO (Extended Data Output) Memory...........................................................................................................................95
EEPROM (Electronic Erasable Programmab le ROM)....................................................................................................95
EPROM (Erasable Programmabl e ROM).......................................................................................................................95
EV6 Bus ........................................................................................................................................................................ 96
FCC DoC (Declaration of Conformity)............................................................................................................................ 96
FC-PGA (Flip Chip-Pin Grid Array) ................................................................................................................................96
Flash ROM ....................................................................................................................................................................96
FSB (Front Side Bus) Clock ...........................................................................................................................................9 7
2
I
C Bus ..........................................................................................................................................................................97
IEEE 1394 .....................................................................................................................................................................97
Parity Bit........................................................................................................................................................................98
PBSRAM (Pipelined Burst S RAM) .................................................................................................................................98
PC-100 DIMM ................................................................................................................................................................ 98
PC-133 DIMM ................................................................................................................................................................ 98
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PC-1600 or PC-2100 DDR SDRAM...............................................................................................................................99
PCI (Peripheral Component Interface) Bus....................................................................................................................9 9
PDF Format...................................................................................................................................................................99
PnP (Plug and Play) ......................................................................................................................................................99
POST (Power-On Self Test) ......................................................................................................................................... 10 0
RDRAM (Rambus DRAM)............................................................................................................................................100
RIMM (Rambus Inline Memory Module)....................................................................................................................... 1 00
SDRAM (Synchronous DRAM) .................................................................................................................................... 10 0
Shadow E
SIMM (Single In Li ne M emory Mod ule)........................................................................................................................101
SMBus (System Management Bus) .............................................................................................................................101
SPD (Serial Presence Detect ) .....................................................................................................................................101
Ultra DMA .................................................................................................................................................................... 1 02
USB (Universal Serial B us) ..........................................................................................................................................102
VCM (Virtual Channel Memory)................................................................................................................................... 10 3
ZIP file.........................................................................................................................................................................103
2
PROM ........................................................................................................................................................101
Troubleshooting......................................................................................................................... 1 0 4
Technical Support ......................................................................................................................108
Product Registration..................................................................................................................11 1
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How to Conta ct Us.....................................................................................................................112
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YYoouu MMuusstt NNoottiiccee
Adobe, the Adobe logo, Acrobat is trademarks of Adobe Systems Incorporated.
AMD, the AMD logo, Athlon and Duron are trademarks of Advanced Micro Devices, Inc.
Intel, the Intel logo, Intel Celeron, Pentium II, Pentium III are trademarks of Intel Corporation.
Microsoft, Windows, and Windows logo are either registered trademarks or trademarks of Microsoft Corporation in the United
States and/or other countries.
All product and brand names used on this manual are used for identification purposes only and may be the registered
trademarks of their respective owners.
All of the specifications and information contained in this manual are subject to change without notice. AOpen reserves the right
to revise this publication and to make reasonable changes. AOpen assumes no responsibility for any errors or inaccuracies that
may appear in this manual, including the products and software described in it.
This documentation is protected by copyright law. All rights are reserved.
No part of this document may be used or reproduced in any form or by any means, or stored in a database or retrieval
system without prior written permission from AOpen Corporation.
Copyright
©
1996-2000, AOpen Inc. All Rights Reserved.
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BBeeffoorree YYoouu SSttaarrtt
This Online Manual will introduce to the user how this product is installed. All useful information will be described in later
chapters. Please keep this manual carefully for future upgrades or system configuration changes. This Online Manual is saved
in PDF format
get free download from Adobe web site
Although this Online Manual is optimized for screen viewing, it is still capable for hardcopy printing, you can print it by A4 paper
size and set 2 pages per A4 sheet on your printer. To do so, choose File > Page Setup and follow the instruction of your printer
driver.
Thanks for the help of saving our earth.
, we recommend using Adobe Acrobat Reader 4.0 for online viewing, it is included in Bonus CD disc or you can
.
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OOvveerrvviieeww
Thank you for choosing AOpen AK77 Pro(A)-133 / AK77 Plus(A)-133. The AK77 Pro(A)-133 / AK77 Plus(A)-133 is AMD® Socket
462 motherboard (M/B) based on the ATX form factor featuring the VIA Apollo KT266A chipset
built in the M/B, the AK77 Pro(A)-133 / AK77 Plus(A)-133 AMD
EV6
system bus. In the AGP performance, it has one AGP slot and supports AGP 1X/2X/4X mode and pipelined spilt-transaction
long burst transfer up to 1056MB/sec. With high bandwidth 266MB/s 8-bit V-Link Host Controller, PC1600
SDRAM can be applied to the AK77 Pro(A)-133 / AK77 Plus(A)-133 and the maximum memory size can be up to 3GB. The
on-board IDE controller supports Ultra DMA
66/100/133 mode and the transfer rate up to
133MB/s. AK77 Plus(A)-133 with a Promise
FastTrak™ 100 Lite IDE RAID controller that
provides high performance and fault tolerance.
Further flexibility can be achieved by taking
advantage of the Communication and Network
Riser (CNR) card option that allows audio and
modem configuration on a single baseboard design.
Besides, the AK77 Pro(A)-133 / AK77 Plus(A)-133
has an AD 1885 AC97
provides high performance and magic surround
stereo sound to let people enjoy working with it.
Now, enjoy all features from AOpen AK77
Pro(A)-133 / AK77 Plus(A)-133.
CODEC chipset onboard for
®
Socket 462 series Athlon™ & Duron™ processor and 266MHz
®
. As high performance chipset
and PC2100 DDR
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FFeeaattuurree HHiigghhlliigghhtt
CPU
Supports AMD® Socket 462 series CPU with both 200MHz and 266MHz EV6 Bus designed for Socket 462 technology.
Athlon: 600MHz~1.4GHz
Duron: 600MHz~1.2GHz
AthlonXP: 1500+(1.3GHz)~1900+(1.6GHz)
Chipset
The VIA Apollo KT266A consists of the VT8366A V-Link DDR Host system controller and the VT8233A highly integrated V-Link
Client PCI/LPC controller. The Host system controller provides superior performance between the CPU, SDRAM, AGP bus, and
V-Link interface with pipelined, burst, and concurrent operation. The VT8233A V-Link Client controller is a highly integrated
PCI/LPC controller. Its internal bus structure is based on 66MHz PCI bus that provides 2x bandwidth compare to previous
generation PCI/ISA bridge chips. The VT8233A integrated Client V-Link controller with 266MB/s bandwidth between Host/Client
V-Link interface, provides a V-Link-PCI and V-Link-LPC controller. Of five PCI slots provided, AK77 Pro(A)-133 supports all five
master PCI slots with arbitration and decoding for all integrated functions and LPC bus; while AK77 Plus(A)-133 supports four
master PCI slots for arbitration and decoding functions also and one slave PCI slot.
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Ultra DMA 66/100/133 Bus Mater IDE
Comes with an on-board PCI Bus Master IDE controller with two connectors that supports four IDE devices in two channels,
supports Ultra DMA
66/100/133, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 4, and supports Enhanced IDE devices.
Expansion Slots
Including five 32-bit/33MHz PCI, one CNR and one AGP 4X slots. The PCI local bus throughput can be up to 132MB/s. The
Communication & Nectworking Riser (CNR)
for a Modem /Aud io ca rd. The Accelerated Graphics Port (AGP)
and speed. The AGP video cards support data transfer rate up to 1056MB/s. As AK77 Pro(A)-133 / AK77 Plus(A)-133 includes
one AGP expansion slot for a bus mastering AGP graphic card, For AD and SBA signaling, AK77 Pro(A)-133 / AK77 Plus(A)-133
can support 133MHz 2X/4X mode.
slot provided from AK77 Pro(A)-133 / AK77 Plus(A)-133 c an support CNR interface
specification provides a new level of video display sophistication
Memory
With VIA Apollo KT266A chipset, the AK77 Pro(A)-133 / AK77 Plus(A)-133 can support Double-Data-Rate (DDR) SDRAM. The
DDR SDRAM interface allows zero wait state bursting between the SDRAM and the data buffers at 66/100/133MHz. The six
banks of DDR SDRAM can be composed of an arbitrary mixture of 1M/2M4M/8M/16M/32M/64MxN DDR SDRAM and maximum
up to 3GB. The AK77 Pro(A)-133 / AK77 Plus(A)-133 allows DDR SDRAM to run at either synchronous or pseudo-synchronous
mode with the host CPU bus frequency (66/100/133MHz).
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On-board ATA/100 IDE RAID (AK77 Plus(A)-133 On ly)
1. Supports data striping (RAID 0) and mirroring (RAID 1). Provides dramatic increase in drive performance and/or fault
tolerant options. Offers performance customization and data rebuilds from the BIOS menu. Mirroring supports automatic
background rebuilds. Fault tolerance can be restored automatically without rebooting.
2. Supports up to four IDE drives which capacities are more than 8.4GB on the two IDE RAID connectors while still supporting
four IDE devices on the motherboard. The burst data transfer rates can up to 100MB/s from ATA/100 drives to boast overall
system performance.
3. Supports IDE Bus Master operation allows multi-tasking during disk drives transfer which increase CPU efficiency, then the
CPU is free to process task during IDE data transfer through PCI bus interface to/from system memory.
On-board AC97 Sound
AK77 Pro(A)-133 / AK77 Plus(A)-133 uses the AD 1885 AC97 CODEC chip. This on-board audio includes a complete audio
recording and playback system.
Four USB Connectors
Provides two ports, four USB connectors for USB interface devices, such as mouse, keyboard, modem, scanner, etc. The
onboard USB Host controller is fully compliant with USB UHCI 1.1 specification that can fully compatible with low power mode
and wake-up specification.
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1MHz Stepping Frequency Adjustment
Provides “1MHz Stepping Frequency Adjustment” function in the BIOS. This magic function allows you adjust CPU FSB
frequency from 100~248 by 1MHz stepping, and lets your system can get maximum performance.
Watch Dog Timer
Includes AOpen “Watch Dog Timer” function that can auto-reset system in 4.8 seconds when you fail to system overclocking.
Die-Hard BIOS with external controller (Upgrade Optional)
The Die-Hard BIOS technology is a very effective hardware protection method that doesn’t involve any software or BIOS coding.
Hence, it is 100% virus free.
Dr. LED (Upgrade Optional)
The Dr. LED has 8 LEDs on AK77 Pro(A)-133 / AK77 Plus(A)-133, which can easily show what kind of problem you may
encounter.
Power Management/Plug and Play
The AK77 Pro(A)-133 / AK77 Plus(A)-133 supports the power management function t hat confirms to t he power-saving standards
of the U.S. Environmental Protection Agency (EPA) Energy Star program. It also offers Plug-and-Play
from configuration problems, thus making the system much more user-friendly.
, which helps saving users
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Hardware Monitoring Management
Supports CPU or system fans status, temperature and voltage monitoring and alert, through the on-board hardware monitor
module and Aopen Hardware Monitoring Utility
.
Enhanced ACPI
Fully implement the ACPI standard for Windows® 95/98/ME/NT/2000 series compatibility, and supports Soft-Off, STR (Suspend
to RAM, S3), STD (Suspend to Disk, S4), WOM (Wake On Modem), WOL (Wake On LAN) features.
Super Multi-I/O
The AK77 Pro(A)-133 / AK77 Plus(A)-133 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 the wireless connections.
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QQuuiicckk IInnssttaallllaattiioonn PPrroocceedduurree
This page gives you a quick procedure on how to install your system. Follow each step accordingly.
1. Installing CPU and Fan
2. Installing System Memory (DIMM)
3. Connecting Front Panel Cable
4. Connecting IDE and Floppy Cable
5. Connecting ATX Power Cable
6. Connecting Back Panel Cable
7. Power-on and Load BIOS Setup Default
8. Setting CPU Frequency
9. Reboot
10. I nst all in g Op er ati ng S yst em (s uc h as W indo ws 9 8)
11. Installing Driver and Utility
17
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A
A
A
A
A
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A
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r
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r
(
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CD-IN Connector
Onboard AC97 CODEC
Die Hard BIOS with 100% Virus
Protection (UpgradeOptional)
JP30 Die Hard BIOS
Select Jumper
Green: AUX-IN Connecto
Red: Modem-CN Connecto
32-bit PCI Expansion Slot x5
JP14 CMOS Data Clear Jumper
CNR Expansion Slot
(PCI 5 supports slave mode
PCI card only)
2nd USB Port Connector
Dr. LED Connector
(Upgrade Optional)
WOM (Wake ON Modem)
WOL (Wake ON LAN)
FAN3 Connector
with H/W Monitoring
Front Audio Connector
Front Panel Connector
PROMISE® FastTrak 100™
Lite IDE RAID Controller
AK77 Plus(A)-133 Onl
System & RAM Power
Chassis Intrusion Sensor
Connecto
Connecto
IrDA Connecto
Indicate LED
Connecto
Motherboard Map
18
PC99 Colored Back Panel
Resettable Fuse
JP28 Keyboard/Mouse
Select Jumper
Wake-u
CPU Fan Connector with
H/W Monitoring
FAN3 Connector
GP 4x Expansion Slot
462-pin CPU Socket with
Voltage and Frequency
uto-Detection that supports
MD® Athlon® / Duron® / and
thlonXP
VIA® Apollo KT266A
Chipset with FANsink and
VT8233A SB
ATA100/133 supported)
TX Power Connector
184-pin DDR SDRAM Slot x3
support maximum up to 3GB
JP21 FSB Select Jumper
IDE Connector x 2
(ATA100/133 supported)
TA/100 IDE RAID
Connector x2 (AK77
Plus(A)-133 Only)
FDD Connector
AAKK7777 PPrroo((AA))--113333 // AAKK7777 PPlluuss((AA))--113333 OOnnlliinnee MMaannuuaall
BBlloocckk DDiiaaggrraamm
Socket 462
AMD
Athlon/Duron
CPU
PC1600/PC2100 DDR
SDRAM Up to 3GB
DDR SDRAM Socket x3
66/100/133MHz
System Bus
AGP Bus
DDR V-Link
Host North 552
AGP 4X Slot
VT8366V
BGA
USB connector x4
Floppy Disk Drive x2
PCI Bus
1stUSB Port
2ndUSB Port
32-bit PCI Sl ot x5
Promise
FastTrak
100 IDE
RAID
Controller
ATA
66/100/133
Primary
Channel
Secondary
Channel
Primary
Channel
Secondary
Channel
VT8233V
V-Link Client
South 376
BGA
Supports ATA100 IDE RAID
0 and RAID 1 Solution
(AK77 Plus Only)
AC’97 Link
Audio CODEC
Modem CODEC
CNR Slot
2MBit Flash EEPROM
Parallel Port
Serial Port x2
IDE Drive x4
IDE Drive x4
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HHaarrddwwaarree IInnssttaallllaattiioonn
This chapter describes jumpers, connectors and hardware devices of this motherboard.
Note: E lectrostatic discharge (ESD) can damage your processor, disk drives, expansion boards,
and other components. Always observe the following precautions before you install a system
component.
1. Do not remove a component from its protective packaging until you are ready to install it.
2. Wear a wrist ground strap and attach it to a metal part of the system unit before handling a
component. If a wrist strap is not available, maintain contact with the system unit throughout
any procedures requiring ESD protection.
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CClleeaarr CCMMOOSS DDaattaa
You can clear CMOS to restore system default setting. To clear the CMOS, follow the procedures below.
1. Turn off the system and unplug the AC power.
2. Remove ATX power cable from connector PWR2.
3. Locate JP14 and short pins 2-3 for a few seconds.
4. Return JP14 to its normal setting by shorting pin 1 & pin 2.
5. Connect ATX power cable back to connector PWR2.
Pin 1
1
Normal Operation
(default)
1
Clear CMOS
Tip: W hen should I Clear CMOS?
1. Boot fa il bec aus e of ove rc lock i ng…
2. Forget password…
3. Troubleshooting…
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CCPPUU IInnssttaallllaattiioonn
This motherboard supports AMD® Athlon and Duron Socket 462 series CPU. Be careful of CPU orientation when you plug it into
CPU soc k e t.
1. Pull up the CPU socket lever and
up to 90-degree angle.
2. Locate Pin 1 in the socket and look for a black dot or cut edge on the
CPU upper interface. Match Pin 1 and cut edge, then insert the CPU into
the socket.
CPU socket
Lever
Note: This picture is for example only, it may not exactly be the same motherboard.
CPU pin 1
and cut edge
Black dot
and cut edge
22
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3. Press down the CPU socket lever and finish
CPU installation.
Note: This picture is for example only, it may not exactly be the same motherboard.
CPU cut edge
Note: If you do not match the CPU
socket Pin 1 and CPU cut edge well, it
ma
damage the CPU.
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JJPP2211 FFSSBB//PPCCII CClloocckk RRaattiioo
This jumper is used to specify the relationship of PCI and FSB clock. Generally speaking, if you are not overclockers, we
recommend you to set it to the default setting. Additionally, this motherboard also provides “1MHz Stepping Adjustment”
feature for overclockers to adjust CPU FSB frequency via BIOS setup program. Based on the CPU type, the adjustment range
has two levels: 100~129 (FSB=100, such as Athlon 800), 130~248 (FSB=133, such as Athlon 1000) MHz for your choosing. You
may also choose a specific FSB frequency ranging from 100~117 (say, 105, 110, 115 for example) and 120~156 with reference
to a frequency table in BIOS setup program. If you fix t he CPU FSB frequency by JP21, the “1MHz Stepping Adjustment” range
will be changed and following your JP21 setting.
-
SW1 CPU Ratio
Select Switch
+
1
2
3
4
1 2 3
FSB=100
CPU Ratio SW1-1 SW1-2 SW1-3 SW1-4
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
10.5
11
11.5
12
12.5
CPU Default 0 0 0 0
－－＋－
＋－＋－
－＋＋－
＋＋＋－
－－－＋
＋－－＋
－＋－＋
＋＋－＋
－－＋＋
＋－＋＋
－＋＋＋
＋＋＋＋
－－－－
＋－－－
－＋－－
＋＋－－
FSB=133
(Default)
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CCPPUU JJuummppeerr--lleessss DDeessiiggnn
CPU VID signal and SMbus clock generator provide CPU voltage auto-detection and allows the user to set the CPU frequency
through the BIOS setup
designs are eliminated. There will be no worry of wrong CPU voltage detection.
, therefore no jumpers or switches are used. The disadvantages of the Pentium based jumper-less
AMD
Socket A CPU
CPU VID signal
Power Regulator
(A utomatically generates CPU voltage)
CPU voltage
Clock
Generator
CPU Freq. Ratio
BIOS
Controlled
Circuit
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FFuullll--rraannggee AAddjjuussttaabbllee CCPPUU CCoorree VVoollttaaggee
This function is dedicated to overclockers, AOpen works together with Fairchild t o develop a special chip FM3540 that s upports
Adjustable CPU Core Voltage from 1.1V to 1.85V by 0.05V stepping. But this motherboard can also automatically detect CPU
VID signal and generates proper CPU core voltage.
BIOS Setup > Frequency/Voltage Control > CPU Voltage Setting
Warning: Higher CPU core voltage may be
able to increase CPU speed for overclocking,
but you may damage the CPU or reduce the
CPU lifecycle.
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This motherboard is CPU jumper-less design, you can set CPU frequency through the BIOS setup, and no jumpers or switches
are needed.
BIOS Setup > Frequency/Voltage Control > CPU Speed Setting
CPU Ratio
CPU FSB
(By BIOS Table)
CPU FS B
(By manual Adjustment)
From 5.5x to 12.5x step 0.5x
100, 102, 105, 108, 110, 113, 115, 117, 120, 122, 124, 133, 136,
138, 140, 142, 144, 147, 152, 154, and 156MHz.
FSB=100, 100~129 by 1MHz stepping adjustment technology
FSB=133, 130~248 by 1MHz stepping adjustment technology
Home
y
Warning: VIA® Apollo KT266A chipset supports 133MHz
FSB (with performance reaches maximum 266MHz EV6
system bus) and 66MHz AGP clock, higher clock setting
may cause serious system damage.
Tip: If your system hangs or fails to boot because of
overclocking, simply use <Home> key to restore the
default setting (433MHz) or you can wait the AOpen
“Watch Dog Timer” reset the system after five seconds
and system will auto-detect hardware again.
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Core Frequency = CPU Bus Clock * CP U Ra tio
PCI Clock = CPU Bus Clock / Clock Ratio
AGP Clock = PCI Clock x 2
EV6 Bus Speed = CPU external bus clock x 2
CPU CPU Core Frequency EV6 Bus Clock Ratio
Athlon 1G 1GHz 200MHz 10.0x
Athlon 1.1G 1.1GHz 200MHz 11.0x
Athlon 1.2G 1.2GHz 200MHz 12.0x
Athlon 1.3G 1.3GHz 200MHz 13.0x
Athlon 1.4G 1.4GHz 200MHz 14.0x
Athlon 1G 1GHz 266MHz 7.5x
Athlon 1.13G 1.13GHz 266MHz 8.5x
Athlon 1.2G 1.2GHz 266MHz 9.0x
Athlon 1.33G 1.33GHz 266MHz 10.0x
Athlon 1.4G 1.4GHz 266MHz 10.5x
AthlonXP 1500+ 1.3GHz 266MHz 10.0x
AthlonXP 1600+ 1.4GHz 266MHz 10.5x
AthlonXP 1700+ 1.46GHz 266MHz 11.0x
AthlonXP 1800+ 1.53GHz 266MHz 11.5x
AthlonXP 1900+ 1.6GHz 266MHz 12.0x
Duron 800 800MHz 200MHz 8.0x
Duron 850 850MHz 200MHz 8.5x
Duron 900 900MHz 200MHz 9.0x
Duron 950 950MHz 200MHz 9.5x
Duron 1G 1GHz 200MHz 10.0x
Duron 1.1G 1.1GHz 200MHz 11.0x
Note: This motherboard support
CPU auto-detection function.
Hence, you don’t need to setup
the CPU frequency manually.
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With this motherboard, AOpen provides a very special, useful feature for overclockers. When you power-on the system, the
BIOS will check last system POST
the CPU FSB
reset the system to reboot in five seconds. Then, BIOS will detect the CPU’s default frequency and POST again. With this
special feature, you can easily overclock your system to get higher system performance without removing the cover of system
housing, and be able to set the jumper to clear CMOS data when your system hanged.
frequency by user’s setting that stored in the BIOS. If system failed in BIOS POST, the “Watch Dog Timer” will
AOpen
Watch Dog
Timer
status. If it succeeded, the BIOS will enable “Watch Dog Timer” function immediately, and set
Enable/Disable Signal
from BIOS
Countdown about
5 seconds if fails
in POST
Reset Signal
Clock Generator
BIOS
CPU ID Signal
CPU
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Plug in the CPU fan cable to the 3-pin CPU FAN connector. If you have chassis fan, you can also plug it on System Fan (FAN2)
or AUX Fan (FAN3) (without H/W monitoring) connector.
FAN2 Connector
GND
+12V
SENSOR
FAN3 Connector
CPU Fan Connector
Note: Some CPU fans do not have
sensor pin, so that cannot support fan
monitoring.
GND
+12V
SENSOR
SENSOR
+12V
GND
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