VIA K8T800 User Manual
User’User’
User’
User’User’
ManualManual
Manual
ManualManual
VIA VIA
K8T800K8T800
VIA
K8T800
VIA VIA
K8T800K8T800
Socket 754 based Athlon 64 processorSocket 754 based Athlon 64 processor
Socket 754 based Athlon 64 processor
Socket 754 based Athlon 64 processorSocket 754 based Athlon 64 processor
ss
s
ss
mainboard for AMD mainboard for AMD
mainboard for AMD
mainboard for AMD mainboard for AMD
60000028H5A10
TRADEMARK
All products and company names are trademarks or registered
trademarks of their respective holders.
These specifications are subject to change without notice.
Manual Revision 1.0
November 02, 2004
DISCLAIMER OF WARRANTIES:
THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE
DESCRIPTION ON THE FACE OF THE MANUFACTURER LIMITED
WARRANTY. THE MANUFACTURER EXPRESSLY EXCLUDES ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, REGARDING ITS
PRODUCTS; INCLUDING ANY IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
NONINFRINGEMENT. THIS DISCLAIMER OF WARRANTIES SHALL
APPLY TO THE EXTENT ALLOWED UNDER LOCAL LAWS IN THE
COUNTRY PURCHASED IN WHICH LOCAL LAWS DO NOT ALLOW OR
LIMIT THE EXCLUSION OF THE IMPLIED WARRANTIES.
ii
80 Port Frequently Asked Questions
Below is a list of some basic POST Codes, possible problems and solutions. For
more detailed information about POST Codes, refer to Appendix C in this manual.
POST CODE Problem Solution
FFh or CFh 1.BIOS chip inserted
incorrectly
2. Incorrect BIOS update
version
3. M ainbo ard proble m
4. Add-on card inserted
incorrectly.
C1h - C5h 1. Memory module
inserted incorrectly
2. Memory com patibility
problem
3. Memory module
damaged
2Dh 1. Error occured in VGA
BIOS
2. VGA card inserted
incorrectly
26 h Overclo ck error Clear CMOS or press the insert
1. Reinsert the BIOS
chip
2. Download the correct
BIOS versio n update
from the manufac turer's
Web site.
3. Replace mainboard
4. Rem ove and replace the
add-on card
1. Reinsert memo ry
mo dule
2. Replace memory
with correct type
3. Replace memory
mo dule
1. Replace VGA card
2. Reinsert the VGA
card
key to power on the system
07 h - 12h 1. Init ke yboard
Initial Keyboard
controller error
2. RTC error
1. Ensure that the keybo ard and
mouse are connected
correctly.
2. Replace the RTC battery.
iii
Table of Contents
Section 1 Introduction
Package Contents ...................................................... 1- 1
Mainboard Features ................................................... 1- 2
System Block Diagram ............................................... 1- 5
Section 2 Specification
Mainboard Specification ............................................ 2-1
Section 3 Installation
Mainboard Layout ..................................................... 3- 1
Easy Installation Procedure ....................................... 3- 2
CPU Insertion ............................................................. 3- 2
Jumper Settings .......................................................... 3- 4
System Memory Configuration .................................. 3- 5
Expansion Slots .......................................................... 3- 6
Device Connectors..................................................... 3- 7
Power-On/Off (Remote) .............................................. 3- 13
External Modem Ring-in Power ON and
Keyboard Power ON Function (KBPO) ..................... 3- 13
STR (Suspend To RAM) Function ............................ 3- 14
CPU Overheating Protection...................................... 3- 15
Page
Section 4 BIOS Setup
Main Menu ................................................................ 4- 1
Standard CMOS Setup ............................................... 4- 2
Advanced BIOS Features .......................................... 4- 3
Advanced Chipset Features ...................................... 4- 6
Integrated Peripherals ................................................ 4- 11
Power Management Setup ......................................... 4- 16
PNP/PCI Configuration .............................................. 4- 19
iv
PC Health Status ........................................................ 4- 21
Power BIOS Features ................................................. 4- 22
Defaults Menu ........................................................... 4- 25
Supervisor/User Password Setting ............................ 4- 26
Exit Selecting .............................................................. 4- 27
Section 5 S-ATA RAID Configuration
Introduction ............................................................... 5- 1
VIA S-ATA RAID Features........................................ 5- 3
Silicon Image SiI3114 SATA RAID Features (Optional) 5- 4
Enable RAID Function ............................................... 5- 5
Section 6 Driver Installation
Easy Driver Installation .............................................. 6- 1
Realtek Sound Manager Quick Guide ........................ 6- 2
Appendix Appendix A
Update Your System BIOS ......................................... A- 1
Appendix B
VIA RAID BIOS Utility ................................................ B- 1
Silicon Image SiI3114 RAID BIOS Utility (Optional) ..... B- 7
Appendix C
POST Codes ............................................................... C- 1
v
Page Left Blank
vi
1-1 Package Contents
Introduction
Section 1
INTRODUCTION
Contents
A. Mainboard
B. User’s manual
C. Floppy drive cable
D. HDD drive cable
E. CD (drivers and utilities)
F. I/O Shield
G. S-ATA data and power cable
A
USER’S
MANUAL
B
Powerpack items (Optional)
H. Mini heatsink
I. Tool Pen
J. Extra USB2.0 port cable
Optional Items
K. Game & COM bracket cable
L. S/PDIF Module
If you need the optional item, please
contact your dealer for assistance.
E
C
D
F
G
H
I
J
K
L
Page 1-1
Introduction
1-2 Mainboard Features
Brief Introduction
2 Athlon
TM
64 Processor
The AMD AthlonTM 64 processor family is designed to support performance
desktop. It provides a high performance HyperTransportTM link to I/O, as well
as a single 64-bit high-performance DDR memory controller.
For more information about all the new features AthlonTM 64 Processor deliver, check out
the AMD website at http://www.amd.com
2 Chipset
The board is designed with VIA chipset, K8T800 as North Bridge and VT8237 as
South Bridge, providing a feature rich and scalable platform. The K8T800 North
Bridge is designed with an ultra fast HyperTransport link to the AthlonTM 64 and
comes equipped with AGP 8X features for VGA card expansion.
The K8T800 North Bridge connects to the VT8237 South Bridge through the fast
Ultra V-Link connection at 1.06GB/s. With support for two Serial ATA channels
at 150MB/s bandwidth, integrated RAID (0, 1 & JBOD) capability as well as up
to eight USB 2.0 ports, the VT8237 offers the highest possible peripheral
performance for professional users. Additional features include a VIA MAC for
10/100Mbps Fast Ethernet, integrated PCI support.
2 Accelerated Graphics Port (AGP)
The AGP slot is compliant with the new AGP 3.0 specification. This new specifi-
cation enhances the functionality of the original AGP specification by allowing
8X data transfers ( 8 data samples per clock) resulting in maximum bandwidth of
2.1GB/s. Only 1.5V AGP cards are supported.
2 Ultra ATA100/133
The mainboard provides an Ultra ATA100/133 Bus Master IDE controller. This
controller supports Ultra ATA100/133 protocols which are ideal to support
demanding applications such as real-time video, multimedia, and a high perfor-
mance operating system. A new IDE cable is required for Ultra ATA100/133.
Page 1-2
Introduction
2 Hardware Monitoring
Hardware monitoring enables you to monitor various aspects of the system
operation and status. The features include CPU temperature, voltage and fan
speed in RPMs.
2 10/100 LAN (Optional)
This mainboard is mounted with a ethernet LAN PHY. It allows the mainboard to
connect to a local area network by means of a network hub.
2 GbE LAN (Optional)
This mainboard is optionally mounted with a Gigabit ethernet LAN chipset. The
new Gigabit Ethernet LAN allows data transmission at 1,000 megabits per second
(Mbps), which runs 10 times faster than conventional 10/100BASE-T Ethernet
LANs.
2 Serial ATA
Support Serial ATA, an evolutionary replacement for Parallel ATA IDE storage
interface. Increases the peak data transfer speed up to 150MB/sec and allows
future enhancements to the computing platform.
2 More S-ATA (Optional)
Extra Silicon Image SiI3114 S-ATA controller onboard for 4 additional S-ATA
ports with 150MB/sec supporting RAID 0, 1 , 10, 5.
2 USB2.0
A popular USB standard for plugging in peripherals with up to 480Mbps transfer
speed while maintaining backward compatibility with older USB1.1 device.
2 Audio
Delivers multi-channel audio to bring you the latest in audio realism from DVD
movies and games. Perfect for your home theatre system.
Page 1-3
Introduction
Special Features
Cool ‘n’Quiet Technology
&
AMD Cool’n’QuietTM Technology enables the processor to operate at a lower
speed to reduce system noise and heat dissipation.
80 Port
&
An onboard LED-display trouble-shooting device, facilitating user to detect
boot-up problems.
QuickSPDIF
&
On board SPDIF-out connector for quick connection to multi-channel speakers.
Not only removes cable cluttering but also delivers loss-free digital audio to let
you enjoy DVD movies and games with crystal clear sound.
Magic Health
&
Reports your system hardware status for every boot-up to help detect faults
early. Monitor hardware status including CPU temperature, CPU/Memory/AGP
voltage, fan RPM speed for chassis fan, CPU fan & Power supply fan.
EZ-Boot
&
Simply press “ESC” to select your bootable device. No more hassle to search the
BIOS menu, change and re-start.
PowerBIOS
&
Supporting a full range of overclocking setting via BIOS. Various adjustable
feature include clock and voltage tweaking for FSB/AGP/Memory.
Page 1-4
1-3 System Block Diagram
Introduction
Page 1-5
Introduction
Page 1-6
Mainboard Specification
Processor
Supports 754-pin Socket for AMD Athlon 64 processors with 1.6GTs Hyper
Transport FSB up to 3700+
Chipset
VIA K8T800 AGPset : VIA K8T800 + VT8237
Main Memory
Three 184-pin DDR DIMM sockets for 64-bit, Unbuffered, Single/Double-
side and DDR-266/333/400 DIMMs
Supports up to 3GB memory size
Specification
Section 2
SPECIFICATION
BIOS
Flash EEPROM with Award BIOS
- ACPI v2.0 compliant
- S3 (Suspend to DRAM) sleep-state support
- SMBIOS (System Management BIOS) v2.2 compliant
- Supports Power failure recovery
- Able to wake the computer from specific states by LAN, Power switch,
PME#, RTC alarm, USB, PS2 K/B, PS2 Mouse, Modem Ring-in COM#1…
Onboard PCI Devices
LAN --> Embedded 10/100Mbps Fast Ethernet controller with onboard
VIA 6103 PHY (Optional)
Integrates 1Gbps Ethernet controller with onboard Marvell
88E8001 LAN Chipset (Optional)
Page 2-1
Specification
S-ATA --> Integrated Serial ATA controller from Silicon Image SiI3114
(Optional)
for 4 ports solution with RAID 0, 1 ,10, 5 and support up to
150MB/sec transfer rate
For more detailed information about SiI3114, refer to
user’s manual in the bundled CD.
Legacy IO Controller
Winbond W83687THF LPC IO controller with floppy, printer, game (optional),
serial and SIR interface
Supports Hardware Monitoring function
Intelligent CPU fan speed control to lower system noise
Audio
Six channel audio with analog and digital output using Realtek ALC655
AC’97 CODEC, or
Eight channel audio with analog and digital output using Realtek ALC850
AC’97 CODEC (for high-end model only)
- AC’97 v2.3 compliant
- Supports CD-In, Aux-In and S/PDIF-in/out interface
- Supports Line-out and Mic-In for front panel
- Supports automatic “jack-sensing”
- Rear panel audio jacks configuration, please refer to one of the following
table:
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eulBthgiLni-eniLtuo-oeretsraeR
emiLtuo-eniLtuo-oeretstnorF
kniPni-ciMrefoowbuS&retneC
noitarugifnoC058CLAroF
roloCkcaJenohP lennahc2 lennahc6 lennahc8
eulBthgiLni-eniLni-eniLni-eniL
emiLtuo-eniLtuo-oeretstnorFtuo-oeretstnorF
kniPni-ciMni-ciMni-ciM
yarGtuo-oeretsediS
kcalBtuo-oeretsraeRtuo-oeretsraeR
egnarOrefoowbuS&retneCrefoowbuS&retneC
Page 2-2
Specification
Peripheral Interfaces
))
) At Rear Panel
))
PS/2 keyboard and mouse ports
One Parallel (printer) port
One S/PDIF-Out Coaxial jack
One S/PDIF-Out Optical (Optional)
One Serial port
One RJ45 LAN connector (Dual LAN optional for high-end level only)
Four USB2.0 ports
Three Audio jacks, (or Six Audio jacks for high-end model only)
))
) Onboard connector and pin-header
))
One floppy drive connector
Two ATA-133 IDE connectors
Four extra USB2.0 ports
One CD-IN and One AUX-IN connector
One S/PDIF in/out connector
One IR connector
One Game port connector (Optional)
One COM2 connector (Optional)
Six S-ATA connectors ( 4 optional from Silicon Image SiI3114 chip)
Three Fan connectors
Front Panel Controller
Supports Reset & Soft-Off switches
Supports HDD & Power LEDs
Supports PC speaker
Supports Front Panel Audio connector
Expansion Slots
One AGP slot supporting 1.5v 4X/8X AGP card
- AGP v3.0 compliant
Page 2-3
Specification
Five PCI slots with Bus Master support
- PCI v2.2 compliant
Other Features
Magic Health – a H/W monitoring software utility, for voltages, tempera-
tures and fan-speeds sensing
EZ Boot – Simply press “ESC” to select your bootable device. No more
hassle to search the BIOS menu, change and re-start.
KBPO – Keyboard power on, turn on the computer from keyboard
Supports “Cool’n’ Quiet” power saving technology
Excellent Overclocking capabilities through
- subtle voltage tuning for CPU, Memory, AGP
- subtle frequency tuning on FSB with 1MHz
- Supports complete Asynchronous FSB/Memory and Asynchronous FSB/
AGP, PCI scheme for overclocking
P80P for system debugging
Form Factor
305mm x 245 mm ATX size
Page 2-4
Mainboard Layout
Installation
Section 3
INSTALLATION
Note: Depending on the model you purchased, some components
are optional and may not be available.
Page 3-1
Installation
Easy Installation Procedure
The following must be completed before powering on your new system:
3-1. CPU Installation
3-2. Jumper Settings
3-3. System Memory
3-4. Expansion Slots
3-5. Device Connectors
3-1 CPU Installation
<Figure 1> <Figure 2>
Step 1
Place the back plate into the two holes
around the CPU area behind the mainboard.
Step 2
Place the retention mechanism on the
mainboard as shown.
<Figure 3>
Step 3
Screw in the two pan head screws.
Page 3-2
<Figure 4>
Step 4
Open the socket by raising the actuation
lever.
Installation
<Figure 5>
Step 5
Align pin 1 on the CPU with pin 1 on
the CPU socket and gently insert the
CPU. The CPU is keyed to prevent
incorrect insertion. Do not force the
processor into the socket. If it does not
go in easily, check for mis-orientation
and reinsert the CPU.
Make sure the processor is fully
inserted into the socket.
<Figure 7>
Step 7
Insert the heatsink as shown above.
Press the clips in the direction of the
arrows shown in Figure 7 to secure the
assembly to the CPU socket.
<Figure 6>
Step 6
Close the socket by lowering and
locking the actuation lever.
Apply thermal compound to the top of
the CPU.
Note:
Thermal compound and qualified
heatsink recommended by AMD are a
must to avoid CPU overheat damage
.
<Figure 8>
Step 9
Plug the CPU fan power into the
mainboard’s CPU fan connector.
The installation is complete.
Page 3-3
Installation
3-2 Jumper Settings
JCMOS:
Clear CMOS data Jumper
If the CMOS data becomes corrupted or
you forgot the supervisor or user
password, clear the CMOS data to
reconfigure the system back to the
default values stored in the ROM BIOS.
Settings:
1-2: Normal (Default)
1
To CMOS Clear data, please follow the steps below.
1. Turn off the system.
2. Change the jumper from “1-2” to “2-3” position for
a few seconds.
3. Replace the jumper back to the “1-2” position.
4. Turn on the system and hold down the <Del> key
to enter BIOS setup.
2-3: Clear CMOS
Page 3-4
Installation
3-3 System Memory Configuration
Memory Layout
The mainboard accommodates three PC2100/PC2700/PC3200 184-pin DIMMs (Dual
In-line Memory Modules):
• Supports up to 3.0GB of 266/333/400MHz DDR SDRAM.
• Supports unbuffered DIMM configurations defined in JEDEC DDR DIMM
specification.
DDR DIMM 1
<Figure 9>
DDR DIMM 2
DDR DIMM 3
Follow the recommendation below for maximum memory performance :
oNtolS
1#MMIDSSSSSSSDSDSS/SD
2#MMIDSSSDSSSS/SD
3#MMIDSSSDSSSS/SD
sMMID3sMMID2MMID1
004RDD
* DS - Double-sided DIMM, * SS - Single-sided DIMM
For 1 DIMM:
- Mount on any slot to obtain DDR400 speed.
For 2 DIMM:
- Mount DS DIMM on Slot 1 and the remaining DIMM on Slot 2 or 3
with SS DIMM.
- Mount SS DIMM on Slot 1 and the remaining DIMM on Slot 2 or 3
with DS DIMM.
For 3 DIMM:
- Use SS DIMM on all 3 three slots for DDR400 speed.
NOTES:
• Using non-compliant memory with higher bus speeds (overclocking)
may severely compromise the integrity of the system.
Page 3-5
Installation
3-4 Expansion Slots
AGP Slot
The mainboard is equipped with an AGP
slot. Make sure you install a card that
supports the 1.5V specification.
AGP Slot
PCI Slots
The mainboard is equipped with 5 PCI
slots.
PCI Slots
AGP Card Installation Caution
When installing the AGP card make sure the AGP card edge
connector is inserted fully into the slot and the slot clicker is locked.
Page 3-6
Installation
3-5 Device Connectors
The I/O back panel for this mainboard is shown below. When installing the mainboard
into the computer case, use the bundled I/O shield to protect this back panel.
RJ45 LAN
Parallel Port
(Optional)
PS/2
Mouse
PS/2
Keyboard
S/PDIF-out
Coaxial Jack
JCPU_FAN
S/PDIF-out
Optical
(Optional))
JPWR_FAN
JSYS_FAN
or
COM1
USB2.0 x 4 ports
5.1 Audio
Channel
7.1 Audio Channel
(for high-end
model only)
Figure 10 - I/O Ports
JCPU_FAN / JPWR_FAN / JSYS_FAN:
CPU/Power/Chassis Fan Power Connectors
JCPU_FAN: The CPU must be kept cool by using a
heatsink with fan assembly.
JPWR_FAN: If you are installing an additional fan
in the unit, connect to this fan
connector.
JSYS_FAN: The chassis fan will provide adequate
airflow throughout the chassis to
prevent overheating the CPU.
JCPU_FAN
Sense
+12V
Ground
JPWR_FAN
Sense
Ground
+12V
JSYS_FAN
Sense
+12V
Ground
This mainboard is equipped with intelligent fan
speed control. Refer to the PC Health Status
submenu of the BIOS.
Page 3-7
Installation
FDD
IDE2
FDD: Floppy Controller Connector
This connects to the floppy disk drive.
IDE1/IDE2: Ultra DMA-100/133 Primary/Secondary
IDE Connector
IDE1
This mainboard is equipped with 2 IDE connectors
to support up to 4 ATA-100/133 IDE drives.
It supports PIO and DMA mode operations for
maximum data transfer rate of 133MB/sec per channel.
34 33
2
FDD
PW1
PW12
3
1
PW12
40 39
When using two IDE drives on the same
connector, one must be set to Master mode and
the other to Slave mode. Refer to your disk
drive user’s manual for details.
1
1
2
IDE1/IDE2
PW1: 20-pin ATX Power Connector
PW12: 4-pin ATX12V Power Connector
The mainboard is equipped with a standard 20-pin
ATX main power connector and a 4-pin +12V
power connector for connecting an ATX12V
power supply. The plugs of the power cables are
designed to fit in only one orientation. Insert the
plugs into the connectors until they fit in place.
Caution:
10
20
+5V+12V
+5V5VSB
4
+12V+12V
GroundGround
2
-5VPW-OK
GroundGround
Ground+5V
GroundGround
PS-ON+5V
GroundGround
-12V3.3V
3.3V3.3V
1
11
PW1
The PW1 and PW12 Power Connector must be used simultaneously.
The board requires a minimum of 300 Watt power
supply to operate. Your system configuration (amount
of memory, add-in cards, peripherals, etc.) may
exceed this minimum power requirement. To ensure
that adequate power, use a 350 Watt or greater power
supply.
Page 3-8
Installation
CFPA: Front Panel Audio Connector
When the jumpers are removed this connector can
be used for front panel audio. The front panel
phone jack should have “normal close” switch.
Without phone plug inserted, the rear panel audio is
enabled. With phone plug inserted, the rear panel
audio will be disabled.
1
MIC_In
Front Line-out-R
Settings
Pins (5-6) & (9-10) Short (default): Only the onboard rear
panel audio jack can be used.
Pins (5-6) & (9-10) Open: Only front panel audio jack can
be used.
In 2-Channel audio mode, Mic-In is shared for both front panel and rear panel.
NC
Front Line-out-L
9210
In 6-Channel audio mode, the Mic-In is dedicated for front panel use, and rear
panel Mic-In function will switch to Center and Subwoofer support.
GND
+5V
Rear Line-out-FR
Key
Rear Line-out-FL
AUX-IN
CD-IN
CD-IN/AUX-IN: CD Audio_IN Connector
The CD-IN and AUX-IN connectors are used to
receive audio form a CD-ROM drive, TV tuner or
MPEG card.
CD-IN AUX-IN
1
CD_IN_Right
CD_Reference
CD_IN_Left
1
AUX_IN_Right
GND
AUX_IN_Left
Page 3-9
Installation
SPDIF1: Sony/Philips Digital InterFace connector
This connector links digital audio between the
mainboard and your audio devices, such as CD
player, sampler or DAT recorder. It allows the
digital transmission of audio data in S/PDIF format.
VCC
SPDIF_IN
5
6
GND
1
2
NC
SPDIF_OUT
GAME1: Game/MIDI connector (Optional)
This port works well with any application that is
compatible with the standard PC joystick.
J1CX
J1CY
J1B1
J1B2
GND
J2CX
J2B1
MIDI_Out
+5V
+5V
1
2
15
16
+5V
MIDI_In
J2B2
J2CY
Page 3-10
COM2: Serial Port Connector (Optional)
The serial port can be used with modems, serial
printers, remote display terminals, and other serial
device.
RTS
RI
DSR
CTS
TXD
10
9
Ground
DTR
2
1
DCD
RXD
SATA3 SATA4
SATA2
SATA1
SATA5
SATA6
Installation
SATA1 / SATA2: Two Serial ATA Connectors
SATA3 / SATA4 / SATA5 / SATA6 (Optional):
Four Serial ATA Connectors from Silicon Image
SiI3114 chip.
These connectors enable you to connect Serial
ATA devices that conform to the Serial ATA
specification.
GND
B+
GND
1
A+
GND
A-B-
LED1: 80 Port Debug LED
Provides two-digit POST code to show why the
system fail to boot. Allows quick and easy
optimization.
80 Port Debug 7-segment LED display
(Refer to Appendix C for POST codes)
CUSB3/CUSB4: Four USB 2.0 ports
This mainboard includes 2 additional USB2.0 ports,
identified by two 10-pin connector.
If you wish to use the additional USB ports, install
the card-edge bracket to the system chassis then
insert its cables to this 10-pin connector.
CUSB3 CUSB4
Please make sure the USB cable has the same pin assignment. A different pin assignment
may cause damage to the system. If you need the USB cable, please contact our retailer.
CAUTION !
Page 3-11
Installation
CFP
CFP: Front Panel Connector
HD_LED
This LED will light up whenever the hard drive
is being accessed.
PWR_LED
This connects to the power button of the
system chassis
CIR&
CSPK
RST
CFP
This switch allows you to reboot without
having to power off the system thus prolonging
the life of the power supply or system.
PW_ON
This is connected to the power button on the
case. To use the Soft-Off by PWR-BTTN
feature, refer to the Power Management Setup
in the BIOS setup section of this manual.
CIR
CSPK
Page 3-12
CIR: IR connector
Connect the IrDA cable (if available) to this IR
connector.
CSPK: Speaker
Connect to the system’s speaker for beeping
Installation
3-6 Power-On/Off (Remote)
This board has a 20-pin ATX and a 4-pin ATX12V power supply connector to support
power supplies with Remote On/Off feature. The 4-pin ATX12V connector must be
plugged in for the system to operate safely. The chassis power button should be
connected to the mainboard front panel PW_ON header (Figure 11).
You can turn off the system in two ways: by pressing the front panel power On/Off
button or using the "Soft Off" function that can be controlled by an operating
system such as Windows®XP/ME/2000/98.
Note: For m ai ntain ing the DDR SDRAM power during STR (ACPI S3) function, it is strongly
recommended to use power supplies that have a +5VSB current of (>=) 2A. Please check the
5VSB’s specification printed on the power supply’s outer case.
Note: The board requires a minimum of 300 Watt power supply to operate. Your system configura-
tion (amount of memory, add-in cards, peripherals, etc.) may exceed this minimum power
requirement. To ensure that adequate power, use a 350 Watt (or higher) power supply.
12V 4-pin
20-pin
PW-ON
Case (chassis) Power ON/OFF button (PW-ON)
Figure 11: Simple ATX power ON/OFF controller
3-7 External Modem Ring-in Power ON and
Keyboard Power ON Functions (KBPO)
Modem-Ring Power ON Function
The mainboard supports External Modem Ring-in Power ON function. Once you connect
an external modem to COM port, you can turn on the system through remote and host
dial-up control.
Keyboard Power ON Function
The mainboard features a keyboard power on function to turn on the power supply
using a keypress. Refer to the Power Management Setup in the BIOS setup section
for details. To enable this feature, the BIOS default setting is Keyboard Hot Key
(<Ctrl> + <F1>). To power off the system, use the Soft-OFF function under Windows
XP/ME/2000/98. (refer to Windows online help).
Page 3-13
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