TUWhat’s in this manualUT ......................................................................................................................................................2
TUYou Must NoticeUT..............................................................................................................................................................8
TUBefore You StartUT .............................................................................................................................................................9
TUSetting CPU FrequencyUT ................................................................................................................................................24
TUAOpen “Watch Dog ABS”UT .............................................................................................................................................. 26
TUCPU and Housing Fan Connector (with H/W Monitoring)UT ..............................................................................................27
TUAGP Protection Technology and AGP LEDUT ...................................................................................................................53
TUBattery-less and Long Life DesignUT ................................................................................................................................54
TUHow To Use Phoenix-Award™ BIOS Setup ProgramUT ....................................................................................................64
TUHow To Enter BIOS SetupUT.............................................................................................................................................65
TUBIOS Upgrade under Windows environmentUT ................................................................................................................. 66
TUDriver and Utilit yU T .......................................................................................................................69
TUAuto-run Menu from Bonus CDUT .....................................................................................................................................69
TUInstalling VIA 4 in 1 DriverUT ............................................................................................................................................ 70
TUInstalling USB 2.0 DriverUT ...............................................................................................................................................75
TUGlossar yU T ....................................................................................................................................76
TUACPI (Advanced Configuration & Power Interface)UT ....................................................................................................... 76
TUACR (Advanced Communication Riser)UT ........................................................................................................................76
TUATX Power ConnectorUT...................................................................................................................................................30
TUAC Power Auto RecoveryUT .............................................................................................................................................3 0
TUIDE and Floppy ConnectorUT ............................................................................................................................................ 31
TUSupport Six USB 2.0 PortUT .............................................................................................................................................42
TUColor Coded Back PanelUT ............................................................................................................................................... 43
TUCase Open ConnectorUT ..................................................................................................................................................45
TUCD Audio ConnectorU T .....................................................................................................................................................46
TUGame Port Bracket SupportedUT ......................................................................................................................................48
TUPnP (Plug and Play)UT......................................................................................................................................................8 3
TUPOST (Power-On Self Test)U T ..........................................................................................................................................83
TUPSB (Processor System Bus) ClockUT .............................................................................................................................84
TURDRAM (Rambus Dynamic Random Access Memory)UT .................................................................................................84
TUWireless LAN – 802.11bUT ...............................................................................................................................................86
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, Pentium 4 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
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
HTUPDF format UTH, we recommend using Adobe Acrobat Reader 5.0 for online viewing, it is included in HTU Bonus CD discUT H or you can
in
get free download from
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.
Thank you for choosing AOpen AK77-400G / AK77-400GN motherboard. The AK77-400G / AK77-400GN motherboard is AMDP
Socket 462 motherboard based on the ATX form featuring the
motherboard, this motherboard comes with AMD
®
P
P
Socket 462 series Athlon™ & Duron™ and AthlonXP™ processor (with CPU
Overheat Protection circuit to Athlon™XP CPU only)and 200/266/333 MHz
HTUVIA KT400A chipsetUTH . As high performance chipset built in the
HTUEV6U TH system bus. In the AGP performance, it has
one AGP slot and supports AGP 8X/4X/2X mode and pipelined spilt-transaction long burst transfer up to 2.1GB/sec. With high
bandwidth 266/533MB/s 8-bit V-Link Host Controller,
HTU DDR400UT H, HT UDDR333UT H and H TU DDR266UT H DDR RAM can be applied to this
motherboard and maximum memory size can be up to
3GB. The on-board IDE controller supports Ultra DMA
66/100/133 mode. On the strength of RealTek LAN
controller on board, it provides 10/100M bps Ethernet
for office and home use. Beside, this motherboard has
a S/PDIF connector and an
HTUAC97U TH U CODECU ALC650F
chipset onboard to provide high performance and
magic surround stereo sound to let people enjoy
working with it. More than that, this motherboard
supports
HTU USB 2.0UTH function with a fancy speed of up to
480Mbps. Now, let’s enjoy all features from AOpen
AK77-400G / AK77-400GN.
Socket 462 series CPU with 200/266/333 MHz EV6 Bus designed for Socket 462 technology.
Chipset
The VIA KT400A consists of Host system controller and the VT8235CE highly integrated V-Link Client PCI/LPC controller. The
Host system controller provides superior performance between the CPU, RAM, AGP bus, and V-Link interface with pipelined,
burst, and concurrent operation. The VT8235CE V-Link Client controller is a highly integrated PCI/LPC controller. Its internal
bus structure is based on 66MHz PCI bus that provides 8x bandwidth compare to previous generation PCI/ISA bridge chips. The
VT8235CE integrated Client V-Link controller with 266/533MB/s bandwidth between Host/Client V-Link interface, providing a
V-Link-PCI and V-Link-LPC controller.
Ultra DMA 66/100/133 Bus Master 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.
On the strength of Realtek LAN controller on board, which is a highly integrated Platform LAN Connect device, it provides
10/100 Mbps Ethernet for office and home use.
Expansion Slots
Including five 32-bit/33MHz PCI and one AGP 8X/4X slots. The PCI local bus throughput can be up to 132MB/s. All of them are
master PCI slots with arbitration and decoding for all integrated functions and LPC bus. The
specification provides a new level of video display sophistication and speed. And the data transfer rate can be up to 2112MB/s.
HTU Accelerated Graphics Port (AGP)UTH
Memory
Provides three 184-pin DDR DIMM sockets that support DDR 400/333/266 composed of an arbitrary mixture of 64, 128, 256,
512 MB or 1GB RAM up to 3 GB maximum.
On-board AC97 Sound
AK77-400G / AK77-400GN uses the HTUAC97 CODECU TH RealTek ALC650F chip, which includes a complete audio recording and
playback system.
S/PDIF Connector
S/PDIF (Sony/Philips Digital Interface) is the newest audio transfer file format, which provides impressive quality through optical
fiber and allows you to enjoy digital audio instead of analog audio.
Provides four ports on the back panel and one HTU USBUT H 2.0 header on board to connect USB interface devices, such as mouse,
keyboard, modem, scanner, etc. With fancy speed up to 480Mbps USB 2.0 is 40 times faster than the traditional ones. Except
for the speed increase, USB 2.0 supports old USB 1.0/1.1 software and peripherals, offering impressive and even better
compatibility to customers.
1MHz Stepping CPU Frequency Adjustment
Provides “1MHz Stepping CPU Frequency Adjustment” function in the BIOS. This magic function allows you adjust CPUH TU FSBUT H
frequency from 100~248MHz by 1MHz stepping, and lets your system can get maximum performance.
Watch Dog ABS
Includes AOpen “Watch Dog ABS” function that can auto-reset system in 4.8 seconds when you fail the system overclocking.
Power Management/Plug and Play
AK77-400G / AK77-400GN supports the power management function that confirms to the power-saving standards of the U.S.
Environmental Protection Agency (EPA) Energy Star program. It also offers
configuration problems, thus making the system much more user-friendly.
HTUPlug-and-PlayU TH , which helps saving users from
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.
This chapter describes jumpers, connectors and hardware devices of this motherboard.
Note: Electrostatic 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.
When you read this online manual and start to assemble your computer system, you may find some of functions are called “Manufacturer
Upgrade Optional”, and some are called “User Upgrade Optional”. Though all AOpen motherboards include many amazing and powerful
features, in some situations, these powerful features are not used to every user. Hence, we changed some key features as “Manufacturer
Upgrade Optional” for you to choose. Some optional functions that can be upgraded by users, we call them “User Upgrade Optional”. As for
those optional functions that can’t be upgraded by ourselves, we call them “Manufacturer Upgrade Optional”. If needed, you can contact our
local distributors or resellers for purchasing “User Upgrade Optional” components, and again you can visit AOpen official web site:
HTUhttp://english.aopen.com.tw/UTH for more detail information.
This motherboard supports AMDP
socket (with CPU Overheat Protection function implemented, the system will be automatically power off when the temperature of CPU
reached 97 degree, but works on AthlonXP CPU only).
1. Pull up the CPU socket lever and
up to 90-degree angle.
®
P
Athlon and Duron Socket 462 series CPU. Be careful of CPU orientation when you plug it into CPU
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.
With AMD platform substantially keeps increasing the speed of its CPU, it inevitably led to the
annoying problem of high CPU operation temperature at the same time. In order to prevent
accidental failure of CPU fan, which could cause the burning down of the AthlonXP CPU, we, AOpen, have meticulously
developed a new technology, named, O.H.P. (Overheat Protection) Technology to protect them. Thanks to the intelligent
monitoring design of AOpen O.H.P. technology, user can now finally set their mind at ease even when fan failed to work without
fearing the possible damage of CPU.
Under the circumstances that CPU fan is running properly, AthlonXP temperature should be way below the highest temperature
limit of 97℃. However, if CPU fan accidentally becomes malfunction or improperly installed, the CPU temperature would rocket
abruptly, and you may find your system hang up or crying over the
smoking CPU if you haven’t installed AOpen O.H.P. previously. With
AOpen O.H.P. technology applied, the specific thermal detection pins on
AthlonXP CPU would sense voltage difference when processor is
overheated with fan failed, and the overheat protection system would
immediately send out a signal to abort your system by cutting CPU
electricity before any damage is done. Unlike other manufacturers who use
BIOS or software to control the power supply of CPU, AOpen O.H.P.
Technology is purely hardware-controlled the minute after system boot-up,
and occupies no system resource. We are pleasant to phase in this
practical function on all AOpen AMD series motherboards to protect
customer’s valuable hardware and personal data.
Note: AOpen Overhear Protection Technology only support processors
base on 0.13-micron technology in this motherboard.
Over Current Protection has been popularly implemented on ATX 3.3V/5V/12V switching power supply for a while. However,
new generation CPU is able to use regulator of different voltages to transfer 12V to CPU voltage (for example, to 2.0V). This
motherboard is with switching regulator onboard that supports CPU over-current protection, and it applies to 3.3V/5V/12V power
supply for providing full line over-current protection.
ATX Switching Power Supply
Note: Although we have implemented protection circuit try to prevent any human operating
mistake, there is still certain risk that CPU, memory, HDD, add-on cards installed on this
motherboard may be damaged because of component failure, human operating error or unknown
nature reason. AOpen cannot guaranty the protection circuit will always work perfectly.
Cool down CPU and Chipset is important for system reliability. Enlarged aluminum heat sink provides better heat consumption
especially when you are trying to over clocking the CPU.
BIOS Setup > Frequency/Voltage Control > CPU Bus Frequency
This motherboard is CPU jumper-less design, you can set CPU frequency through the BIOS setup, and no jumpers or switches
are needed. The default setting is "table select mode". You can adjust the FSB from "CPU Bus Frequency" for overclocking.
Core Frequency = CPU HTUBusUTH Clock * C PU Rat io
PCI Clock = CPU Bus Clock / Clock Ratio
HTUAGPU TH Clock = PCI Clock x 2
EV6 Bus Speed = CPU external bus clock x 2
CPU Ratio
CPU FSB
(By manual Adjustment)
Home
Tip: If your system hangs or fails to boot because of overclocking, simply use
<Home> key to restore the default setting or you can wait till the AOpen “Watch
Dog ABS” reset the system in five seconds and system will auto-detect
Note: With CPU speed changing rapidly, there might be fastest CPU
on the market by the time you received this installation guide. This
table is kindly for your references only.
CPU Core
Frequency
EV6 Bus Clock Ratio
®
Note: VIAP
P
KT400A chipset supports 200/266/333MHz
FSB with performance reaches maximum 333MHz EV6
system bus and supports 66MHz AGP clock, higher
clock setting may cause serious system damage.
Warnin g: Supposed you have had adjusted CPU
ratio on your current CPU, and you plan to replace
it with a new CPU. Please use <Home> key or
Clear CMOS to restore the default setting after
reinstalling a new CPU.
HTU FSBUT H frequency by user’s setting that stored in the BIOS. If system failed in BIOS POST, the “Watch Dog ABS” will reset
CPU
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.
AOpen
Watch Dog ABS
Enable/Disable Signal
With this motherboard, AOpen provides a very special, useful feature for overclockers.
When you power-on the system, the BIOS will check last system
succeeded, the BIOS will enable “Watch Dog ABS” function immediately, and set the
This motherboard has three 184-pin DDR HDIMMH sockets that allow you to install HUDDR266UHU/UHU333U HU /400U memory up to 3 GB.
Non-ECC DDR RAM is supported. Otherwise, it will cause serious damage on memory sockets or RAM module.
Warning: This motherboard supports DDR
RAM. Please do not install the SDRAM on
the DDR RAM sockets; otherwise it will
cause serious damage on memory sockets
or RAM module.
Note: According to the standard DDR400 specification from
JEDEC (Joint Electron Device Engineering Council), it is
regulated that DDR400 supports only 2x DIMM on the memory
module for a maximum 2GB capacity, and DDR333 supports
up to 3x DIMM for a maximum of 3GB capacity. Please be
noted that KT400A motherboards follow this standard
specification on memory as well.