AOpen AX45V User Manual
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AX45 / AX45-V
DOC. NO.: AX45-OL-E0110A
a
Overview
Installation
Hardware
Drivers &
Utilities
BIOS Setup
AWARD
Glossary
Troubleshooting &
Technical Support
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WWhhaatt’’ss iinn tthhiiss mmaannuuaall
AX45 / AX45-V............................................................................................................................................. 1
What’s in this manual................................................................................................................................................................2
You Must Notice........................................................................................................................................................................8
Before You Start........................................................................................................................................................................9
Overview.................................................................................................................................................................................10
Feature Highlight.....................................................................................................................................................................11
Quick Installation Procedur e....................................................................................................................................................14
Motherboard Map....................................................................................................................................................................15
Block Diagram.........................................................................................................................................................................16
Hardware Installation ........................................................................................................................... 17
About “Optional” and “Upgrade Optional”…....................................................................................... ......................................18
JP14 Clear CMOS Data..........................................................................................................................................................19
CPU Installation ......................................................................................................................................................................20
CPU Jumper-less Design........................................................................................................................................................23
CPU and System Fan Connector (with H/W Monitoring)..........................................................................................................26
DIMM Sockets.........................................................................................................................................................................27
Front Panel Connector............................................................................................................................................................29
ATX Power Connector.............................................................................................................................................................30
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AC Power Auto Recovery........................................................................................................................................................30
IDE and Floppy Connector......................................................................................................................................................31
IrDA Connector........................................................................................................................................................................33
Thermal Sensor Connector.....................................................................................................................................................34
AGP (Accelerated Graphi c Port) Expansion Slot.....................................................................................................................35
WOM (Zero Voltage Wake on Modem) Connector...................................................................................................................36
WOM by External BOX Modem...............................................................................................................................................37
WOM by Internal Modem Card................................................................................................................................................38
WOL (Wake on LAN)...............................................................................................................................................................39
Support 10/100 Mbps LAN onboard (Optional)........................................................................................................................41
CNR (Communication and Network Riser) Expansion Slot ......................................................................................................42
PC99 Color Coded Back Panel ...............................................................................................................................................43
Support 3 USB Ports...............................................................................................................................................................44
Chassis Intrusion Connector....................................................................................................................................................45
CD Audio Connector................................................................................................................................................................46
Modem Audio Connector.........................................................................................................................................................47
Front Audio Connector ............................................................................................................................................................48
Dr. LED Connector (Upgrade Optional)...................................................................................................................................49
Battery-less and Long Life Design...........................................................................................................................................51
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Over-current Protection...........................................................................................................................................................52
Hardware Monitoring...............................................................................................................................................................53
Resettable Fuse......................................................................................................................................................................54
2200µF Low ESR Capacitor....................................................................................................................................................55
Layout (Frequency Isolation Wall)...........................................................................................................................................56
Pure Aluminum Heatsink.........................................................................................................................................................57
Driver and Utility ................................................................................................................................... 58
Auto-run Menu from Bonus CD Disc........................................................................................................................................ 59
Installing LAN Driver (Optional)...............................................................................................................................................60
Installing Onboard Sound Driver..............................................................................................................................................61
Installing Hardware Monitoring Utility....................................................................................................................................... 62
ACPI Suspend to Hard Drive...................................................................................................................................................63
ACPI Suspend to RAM (STR)..................................................................................................................................................67
AWARD BIOS ......................................................................................................................................... 69
About BIOS Function Description….........................................................................................................................................70
How To Use Award™ BIOS Setup Program ............................................................................................................................71
How To Enter BIOS Setup.......................................................................................................................................................73
BIOS Upgrade.........................................................................................................................................................................74
Overclocking ......................................................................................................................................... 76
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VGA Card & Hard Disk............................................................................................................................................................ 77
Glossary ................................................................................................................................................ 78
AC97.......................................................................................................................................................................................78
ACPI (Advanced Configuration & Power Interface)..................................................................................................................78
AGP (Accelerated Graphic Port)..............................................................................................................................................78
AMR (Audio/Modem Riser)......................................................................................................................................................79
AOpen Bonus Pack CD...........................................................................................................................................................79
APM (Advanced Power Management)..................................................................................................................................... 79
ATA (AT Attachment) ...............................................................................................................................................................79
ATA/66 .................................................................................................................................................................................... 79
ATA/100 ..................................................................................................................................................................................80
BIOS (Basic Input/Output System) ..........................................................................................................................................80
Bus Master IDE (DMA mode)..................................................................................................................................................80
CNR (Communication and Networking Riser)..........................................................................................................................80
CODEC (Coding and Decoding)..............................................................................................................................................81
DDR (Double Data Rated) SDRAM.........................................................................................................................................81
DIMM (Dual In Line Memory Module)......................................................................................................................................81
DMA (Direct Memory Access)..................................................................................................................................................81
ECC (Error Checking and Correction) .....................................................................................................................................82
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EDO (Extended Data Output) Memory....................................................................................................................................82
EEPROM (Electr o n ic Erasable Programmable ROM)..............................................................................................................82
EPROM (Erasable Programmable ROM)................................................................................................................................82
EV6 Bus..................................................................................................................................................................................83
FCC DoC (Declaration of Conformity).....................................................................................................................................83
FC-PGA (Flip Chip-Pin Grid Array)..........................................................................................................................................83
Flash ROM.............................................................................................................................................................................. 83
FSB (Front Side Bus) Clock ....................................................................................................................................................84
2
I
C Bus....................................................................................................................................................................................84
IEEE 1394...............................................................................................................................................................................84
Parity Bit..................................................................................................................................................................................84
PBSRAM (Pipelined Burst SRAM)...........................................................................................................................................85
PC-100 DIMM.........................................................................................................................................................................85
PC-133 DIMM.........................................................................................................................................................................85
PC-1600 or PC-2100 DDR DRAM...........................................................................................................................................85
PCI (Peripheral Component Interface) Bus..............................................................................................................................85
PDF Format.............................................................................................................................................................................86
PnP (Plug and Play) ................................................................................................................................................................86
POST (Power-On Self Test).....................................................................................................................................................86
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RDRAM (Rambus DRAM).......................................................................................................................................................86
RIMM (Rambus Inline Memory Module) ..................................................................................................................................87
SDRAM (Synchronous DRAM)................................................................................................................................................ 87
Shadow E
SIMM (Single In Line Memory Module)....................................................................................................................................87
SMBus (System Management Bus).........................................................................................................................................88
SPD (Serial Presence Detect).................................................................................................................................................88
Ultra DMA...............................................................................................................................................................................88
USB (Universal Serial Bus) .....................................................................................................................................................89
VCM (Virtual Channel Memory)...............................................................................................................................................89
ZIP file.....................................................................................................................................................................................89
Troubleshooting .................................................................................................................................... 90
Technical Support ................................................................................................................................. 94
Product Registration........................................................................................................... .................. 97
How to Contact Us................................................................................................................................ 98
2
PROM....................................................................................................................................................................87
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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 Corporat i on.
Microsoft, Windows, and Windows logo are either registered trademark s or t rademarks of Microsoft Corporation in t he 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 r evis e
this publication and to make reasonable changes. AOpen ass umes 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 cop yright 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 Ri ghts 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 lat er chapters. Please
keep this manual carefully for future upgrades or system configuration changes. This Online Manual is saved in PDF format
recommend using Adobe Acrobat Reader 4.0 for online viewing, it is included in Bonus CD disc
web site.
Although this Online Manual is optimized for screen viewing, it is still capable for hardcopy printi ng, you can print it by A 4 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
or you can get free download from Adobe
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OOvveerrvviieeww
Thank you for choosing AOpen AX45 / AX45-V motherboard. The AX45 / AX45-V is Intel® Socket 478 motherboard (M/B) based on the ATX
form factor featuring the SIS 645 / SIS 961 chipset
support Intel
one AGP slot and supports AGP 4X mode and pipelined spilt-transaction long burst transfer up t o 1056MB/sec. According to different
customer’s requirements, 128, 256, 512Mb and 1GB DDR SDRAM DIMM modules can be applied to the motherboard and the maximum
memory size can be up to 3 GB. The onboard IDE controller supports Ultra DMA
Further flexibility can be achieved by taking advantage of the Communication and Network Riser (CNR)
modem, and/or LAN configuration on a single baseboard design. More than t hat,
on the strength of Realtek 8100BL LAN controller on board, which is an
highly-integrated Platform LAN Connect devic e, it provides 10/100M
bps Ethernet for office and home use (Optional). Besides, the AX45 /
AX45-V has a RealTek ALC201A AC97
providing high performance and magic surround stereo sound to let
people enjoy working with it. Now, let’s enjoy all features from AOpen
AX45 / AX45-V motherboard.
®
Socket 478 Pentium® 4 (Willamette / Northwood) and 400 MHz Front Side Bus (FSB) clock. In the AGP performance, it has
CODEC chipset onboard
. As high performance chipset built in the M/B, the AX45 / AX45-V motherboard can
33/66/100 mode and the transfer rate up to 100MB/s.
card option that allows audio,
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FFeeaattuurree HHiigghhlliigghhtt
CPU
Supports Intel® Socket 478 Pentium® 4 (Willamette / Northwood) 1.3GHz~2.4GHz+ with 400MHz Front Side Bus (FSB) designed for Socket
478 technology.
Chipset
The motherboard is equipped with SIS 645 / 961 chipset. SIS 645 chipset consists of host interface Controller and integrated high
performance DDR SDRAM
delivering 533MB/s Bandwidth. In coordination with SIS 645, the SIS 961 chipset integrated fast Ethernet/Home networking controller,
Audio/Modem Controller with AC’97 interface and advanced power management, which can strongly enhance the system performance.
Host system controller, which provide superior performance between the CPU, SDRAM, AGP bus, and
Expansion Slots
Including six 32-bit/33MHz PCI, one CNR and one AGP 1x2x4X slots. The PCI local bus throughput can be up to 132MB/s. The
Communication & Nectworking Riser (CNR)
Accelerated Graphics Port (AGP)
support data transfer rate up to 1056MB/s. AX45 / AX45-V motherboard includes one AGP expansion slot for a bus mastering AGP graphic
card. For AD and SBA s ignaling, AX45 / AX45-V motherboard can support 4X mode. Of six PCI slots provided, all of them are master PCI
slots with arbitration and decoding for all integrated functions and LPC bus.
specification provides a new level of video display sophistication and speed. The AGP video cards
slot provided from AX45 / AX45-V can support CNR interface for a Modem/Audi o card. The
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Memory
With SIS 645 / 961 chipset, the AX45 / AX45-V can support Double-Data-Rate (DDR) SDRAM. The DDR SDRAM interfac e 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/64Mx1GB DDR SDRAM and maximum up to 3 GB.
LAN Port (Optional)
On the strength of Realtek 8100BL LAN controller on board, which is an highly-integrated Platform LAN Connect device, it provides 10/100
Mbps Ethernet for office and home use.
Ultra DMA 33/66/100 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 33/66/100, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 5, and supports Enhanced IDE devices.
On-board AC’97 Sound
AX45 / AX45-V uses the RealTek ALC201A AC97 sound chip. This on-board audio includes a complete audio recording and playback
system.
Six USB Connectors
Provides three ports, six USB c onnectors for USB interface devices, such as mouse, keyboard, modem, scanner, etc.
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Dr. LED (Upgrade Optional)
The Dr. LED has 8 LEDs on this AX45 / AX45-V M/B to easily show what kind of problems you may encounter.
Power Management/Plug and Play
Supports the power management function that confirms to the power-saving standards of the U.S. Environm ental Protection Agency (EPA)
Energy Star program. It also offers Plug-and-Play
user-friendlier.
, which helps save users from configuration problems, thus making the system much
Hardware Monitoring Management
Supports CPU or system fans status, temperature and voltage monitoring and alert, through the on-board hardware monitor module.
Enhanced ACPI
Fully implement the ACPI standard for Windows® 98/ME/2000 series compatibility, and supports Soft-Off, STR (Suspend to RAM, S3), STD
(Suspend to Disk, S4) features.
Super Multi-I/O
Provides two high-speed UART compatible serial ports and one parallel port with EPP and ECP capabilities. UART can also be directed
from COM1 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 Sys tem 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. Installing Operating Syst em (such as Windows 98)
11. Installing Dri ver and Utility
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A
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Case Open Connecto
2Mbit Programmable
MODEM-CN
Realtek ALC201A
Front Audio Connecto
Thermal Sensor Connecto
CNR Expansion Slot
CD-IN
WOM (Wake on Modem)
Supports 2nd USB Connecto
Supports 3rdUSB Connecto
Front Panel Connecto
JP14 CMOS Clear Jumpe
FAN2 & FAN3 Co nnect o
Dr. LED Connector(Up
Connecto
WOL (Wake on LAN)
Connecto
IrDA Connecto
FDD Connecto
grade Optional)
ATA/33/66/100
IDE Connector x2
Motherboard Map
PC99 Colored Back Panel
Resettable Fuse
4-pin 12V. ATX Power Connector
32-bit PCI Expansion Slot x5
Realtek RTL8100BL (Optional)
2200μF Low ESR Capacitors
GP 4x Expansion Slot
478-pin CPU socket (Willamette/
Northwood) with Voltage and Frequency
uto-detection that suppor ts Intel®
Pentium® 4 1.3~2.4GHz+ CPU
SIS 645/961 Chipset
184-pin DIMMx3 supports
DDR266/DDR333 (DIMMx2)
DDR SDRAM maximum up to 3 GB
TX Power Connector
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BBlloocckk DDiiaaggrraamm
Socket 478
Intel Pentium 4
CPU(Willamette
/Northwood)
AGP 4X Slot
DDR266/DDR333 DDR
SDRAM Up to 1.5GB
DIMM Socket x3
400MHz System
Bus
LAN connect Component
Floppy Disk Drive x2
SIS 645
USB
Connector x6
PCI Bus
Realtek
RTL8100BL
1stUSB Port
2ndUSB Port
3rdUSB Port
32-bit PCI Slot x6
ATA
33/66100
Primary
Channel
Secondary
Channel
SIS 961
Winbond
W83637/
W83627
RealTek
ALC201A
AC97
CODEC
AC Link
Firmware Hub
2Mbit Flash EEPROM
Parallel Port
Serial Port x2
IDE Drive x4
CNR Slot
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HHaarrddwwaarree IInnssttaallllaattiioonn
This chapter describes jumpers, connectors and hardware devices of this motherboard.
Note: Electrostatic discharge (ESD) can damage your proc essor, 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 procedure requiring
ESD protection.
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AAbboouutt ““OOppttiioonnaall”” aanndd ““UUppggrraaddee OOppttiioonnaall””……
When you read this online manual and start to assemble your com puter system, you may f ind some of functi ons are called “Optional”, and
some are called “Upgrade Optional”. Though all AOpen motherboards include m any amazing and powerful features, in some situations,
these powerful features are not used to every user. Hence, we changed some key features as “Optional” for you to choose. Some optional
functions that can be upgraded by users, we call them “Upgrade Optional”. As for those optional functions that can’t be upgraded by
ourselves, we call them “Optional”. If needed, you can contact our local distributors or resellers for purchasing “Upgrade Optional”
components, and again you can visit AOpen official web site: www.aopen.com
for more detail information.
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Pin 1
Normal
default)
1
1
Clear CMOS
Tip: When should I Clear CMOS?
1. Boot fail because of overclocking…
2. Forget password…
3. Troubleshooting…
JJPP1144 CClleeaarr CCMMOOSS DDaattaa
You can clear CMOS to restore system default setting. To clear the CMOS, follow the procedure 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.
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CCPPUU IInnssttaallllaattiioonn
This motherboard supports Intel® Pentium 4 Socket 478 series CPU (Willamette / Northwood). Be careful of CPU orientation when you plug
it into CPU socket.
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.
Note: These pictures are for example only, it may not exactly be the same motherboard.
CPU socket
Lever
CPU pin 1 and
cut edge
CPU cut edge
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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.
Note: This socket supports
Micro-FC-PGA2 package CPU, which is
the latest CPU package developed by
Intel. Other forms of CPU package are
impossible to be fitted in.
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CCPPUU FFaann IInnssttaallllaattiioonn
This motherboard comes with a retention module attached on the CPU socket when shipped, we strongly recommend you to instal l AOpen
special designed CPU Fan as shown below on the retention module for better heat dissipation. Please install the CPU Fan correctly as the
following pictures shown.
1. Gently put the CPU Fan down on the
retention module with clips aligning correctl
to the four corners.
2. Pressing down the four clips with force one by one
on the retention module.
Clip
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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
There will be no worry of wrong CPU voltage detection.
.
, therefore no jumpers or switches are used. The disadvantages of t he Pentium based jumper-less designs are eliminated.
Intel® Socket 478
Pentium 4 &
Celeron CPU
CPU VID signal
Power Regulator
(Automatically generates CPU voltage)
CPU voltage
Clock
Generator
CPU Freq. Ratio
BIOS
Controlled
Circuit
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SSeettttiinngg CCPPUU CCoorree VVoollttaaggee
This motherboard supports CPU VID function. The CPU core voltage will be aut om atically detected.
SSeettttiinngg CCPPUU FFrreeqquueennccyy
BIOS Setup > Frequency/Voltage Control > CPU Clock Setting
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 Host/SDRAM/PCI Clock" for overclocking.
Core Frequency = CPU FSB Clock * CPU Ratio
PCI Clock = CPU FSB Clock / Clock Ratio
AGP Clock = PCI Clock x 2
CPU Ratio
CPU FSB (By BIOS table)
8x, 9x, 10x… 21x, 22x, 23x, 24x
100, 105, 108, 112 and 133MHz.
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CPU
Pentium 4 1.3G 1300MHz 100MHz 400MHz 13x
Pentium 4 1.4G 1400MHz 100MHz 400MHz 14x
Pentium 4 1.5G 1500MHz 100MHz 400MHz 15x
Pentium 4 1.6G 1600MHz 100MHz 400MHz 16x
Pentium 4 1.7G 1700MHz 100MHz 400MHz 17x
Pentium 4 1.8G 1800MHz 100MHz 400MHz 18x
Pentium 4 1.9G 1900MHz 100MHz 400MHz 19x
Pentium 4 2.0G 2000MHz 100MHz 400MHz 20x
Pentium 4 2.2G 2200MHz 100MHz 400MHz 22x
Pentium 4 2.4G 2400MHz 100MHz 400MHz 24x
CPU Core
Frequency
FSB
Clock
System
Bus
Ratio
Warning: SIS 645 / 961 chipset supports
maximum 400MHz (100MHz*4) system bus
and 66MHz AGP clock; higher clock setting
may cause serious system damage.
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CCPPUU aanndd SSyysstteemm FFaann CCoonnnneeccttoorr ((wwiitthh HH//WW MMoonniittoorriinngg))
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) connector.
CPU Fan Connector
FAN2 Connector
GND
+12V
SENSOR
FAN3 Connector
Note: Some CPU fans do not have
sensor pin, so that cannot support
hardware monitoring function.
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DDIIMMMM SSoocckkeettss
This motherboard has three 184-pin DIMM sockets that allow you to install DDR 266 or DDR 333 memory up to 3 GB. Please be noted that
for DDR266 memory, you may install them on all of the sockets; but for DDR333 memory, you may i nstall only them on two sockets.
DIMM1
DIMM2
DIMM3
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HHooww ttoo IInnssttaallll MMeemmoorryy MMoodduulleess
Please follow the procedure as shown below to finish memory installation.
1. Make sure the DIMM module’s pin face down and match the socket’s size as depicted below.
2. Insert the module straight down to the DIMM slot with both hands and press down firmly until the DIMM module is securely in place.
3. Repeat step 2 to finish additional DIMM modules installation.
Tab
40 pins 52 pins
Note: The tabs of the DIMM slot
will close-up to hold the DIMM in
place when the DIMM touches the
slot’s bottom.
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FFrroonntt PPaanneell CCoonnnneeccttoorr
Pin 1
Attach the power LED, Keylock, speaker, power and reset switch connectors to th
corresponding pins. If you enable “Suspend Mode” item in BIOS Setup, the ACPI
Power LED will keep flashing while the system is in suspend mode.
Locate the power switch cable from your ATX housing. It is 2-pin female connecto
from the housing front panel. Plug this connector to the soft-power switch connecto
marked SPWR.
Suspend Type ACP I LED
Power on Suspend (S2) or Suspend to RAM (S3) Flashing for every second
Suspend to Disk (S4) The LED will be turned off
IDE LED
Speaker
1
SPWR
CPI & PWR
LED
Reset
SPEAKER
NC
NC
+5V
IDE LED
IDE LED
+5V
+5V
GND
NC
1
SPWR
GND
ACPI LE D GND
ACPILED
NC
NC
GND
RESET
GND
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AATTXX PPoowweerr CCoonnnneeccttoorr
This motherboard comes with a 20-pin ATX power connector and an extra 4-pin connector as shown below. Make sure you plug in the right
direction. We strongly recommend you to insert the 4-pin connector before connecting the 20-pin connector.
Pin1
Ground
12V
12V
Ground
AACC PPoowweerr AAuuttoo RReeccoovveerryy
COM
COM
+12V
5VSB
PO-O
COM
-5V
+5V
+5V
+5V
COM
PS-ON
COM
-12V
+3.3V
+3.3V
+3.3V
COM
+5V
COM
A traditional ATX system should remain at power off stage when AC power resumes from power failure. This design is inconvenient for a
network server or workstation, without an UPS, that needs to keep power-on. This motherboard im plements an AC Power Auto Recovery
function to solve this problem.
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