This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with instructions contained in this manual, may cause harmful interference
to radio and television communications. However, there is no guarantee that interference
will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
-REORIENT OR RELOCATE THE RECEIVING ANTENNA
-INCREASE THE SEPARATION BETWEEN THE EQUIPMENT AND THE RECEIVER
-CONNECT THE EQUIPMENT INTO AN OUTLET ON A CIRCUIT DIFFERENT FROM
THAT OF THE RECEIVER
-CONSULT THE DEALER OR AN EXPERIENCED AUDIO/TELEVISION TECHNICIAN
NOTE: Connecting this device to peripheral devices that do not comply with Class B
requirements, or using an unshielded peripheral data cable, could also result in
harmful interference to radio or television reception.
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The user is cautioned that any changes or modifications not expressly approved
by the party responsible for compliance could void the user’s authority to operate
this equipment.
To ensure that the use of this product does not contribute to interference, it is
necessary to use shielded I/O cables.
Copyright
This manual is copyrighted with all rights reserved. No portion of this manual may be
copied or reproduced by any means.
While every precaution has been taken in the preparation of this manual, no responsibility
for errors or omissions is assumed. Neither is any liability assumed for damages resulting
from the use of the information contained herein.
Trademarks
All brand names, logos and registered trademarks mentioned are property of their
respective owners.
•Supports 128Mb, 256Mb, 512Mb technologies implemented as X8,
X16 devices.
•Supports DDRII400/DDRII533/DDRII667.
•Support for Non-ECC memory only.
•Maximum memory size: 2GB.
System BIOS
•PnP, APM, ATAPI and Windows® 2000/XP.
•Full support of ACPI & DMI.
•Auto detects and supports LBA harddisks with capacities over 160GB.
•Easy to upgrade BIOS by end-user.
Plug and Play
•Supports Plug and Play specification 1.1.
•Plug and play for Windows® 2000, as well as Windows® XP.
•Fully steerable PCI interrupts.
On-board VGA
•Integrated ATI PCI-E X300 graphic core.
•Supports CRT or TV out display.
•Integrated DAC and CRT controllers.
•Full screen/full speed video playback.
•Up to 2048 x 1536, non-interlaced screen resolution for CRT.
Technical Reference Booklet
On-board I/O
•Two on board PCI fast IDE ports supporting up to 4 ATA, ATA2 , Ultra
ATA33/66/100/133 IDE HDDs, CD-ROMs, ZIP drives and LS-120
drives as boot drive.
•One ECP/EPP parallel port.
•One 16550 Compatible UART serial port.
•One floppy port which supports two FDD of 1.44MB, 2.88MB capacity.
•Eight USB ports (four ports via two headers).
•PS/2 keyboard support.
•PS/2 mouse support.
•One front panel sound connector.
•Infrared (IrDA) support via a header.
Expanded USB Support
•Includes 2 OHCI host controllers, increasing the number of external
ports to eight.
•Includes 1 EHCI USB2.0 Host Controller that supports all eight
ports (Bandwidth is shared between the eight ports).
•This motherboard support USB 2.0 only on Windows
or above) and Windows
® XP (with SP1 or above) operating systems.
® 2000 (with SP4
On-board Realtek RTL8100C/RTL8110S PCI LAN (optional)
•Provides 32-bit performance, PCI bus master capability.
•Full compliance with IEEE 802.3u 100 Base-T specifications and
IEEE 802.3X Full Duplex Flow Control.
•Supports 10 Mb/s, 100 Mb/s and 1000 Mb/s (only for RTL8110S)
operation.
•Supports Wake-On-LAN function and remote wake-up.
•Supports ACPI, PCI Power management and PCI VPD.
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TV Out
•Integrated TV encoder.
•10-bit DAC with 4-tap filter.
•PAL/NTSC TV Out with Composite and S-Video outputs (via a header).
•ATI’s exclusive “Composite Dot Crawl” freeze option for PAL and
NTSC to improve the picture quality.
•TV-Out power management support.
PCI Express Graphics interface
•One 16-lane (X16 port) PCI Express Graphics port, Fully compliant
with the PCI Express Base Specification revision 1.0a.
•A base PCI Express frequency of 2.5GB/s only.
•PCI Express support and Enhanced Addressing Mechanism.
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Power Management
•Supports SMM, APM and ACPI.
•Break switch for instant suspend/resume on system operations.
•Energy star “Green PC” compliant.
•Hardware monitoring circuit provides voltage, fan speed, etc.
monitoring (optional).
•External Modem Ring-in Wake-up support.
•Supports suspend-to-RAM (STR) (optional).
Note: Make sure that the current of your 5VSB power supply is more than
1.5A.
Please use a 300 watt power supply or greater.
On-board AC97 Sound
•Integrated AC97 controller with standard AC97 Codec.
•Direct Sound and Sound Blaster compatible.
•Full-Duplex 16-bit record and play back.
•PnP and APM 1.2 support.
•Windows® 2000/XP ready.
•Line-in, Line-out, Mic-in.
•Supports ALC655 AC97 codes for six sound channel output (optional).
On board Serial ATA host Controller (optional)
•Independent DMA operation on two ports.
•Data transfer rates of 150Mb/s.
•RAID feature support .
Expansion Slots
•1 PCI Express X16 slot.
•2 PCI slots, - ver. 2.2 compliant.
Static electricity can harm delicate components of the motherboard.
To prevent damage caused by static electricity, discharge the static
electricity from your body before you touch any of the computers
electronic components.
Technical Reference Booklet
MOTHERBOARD LAYOUT
The following diagram shows the relative positions of the jumpers, connectors,
major components and memory banks on the motherboard.
LGA775 Socket
77
7
77
FOXCONN
REMOVE
NOTE
1) Be sure to check the cable orientation in order to match the colored strip to the
pin 1 end of the connector.
2)When you start up the system, please wait for 5 seconds after you power on
AC.
3) Adding a metal spaced plate to the back of the Socket 775 is not recommended
as this will short motherboard components and damage the system.
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REAR PANEL
The back panel provides the following connectors:
Mouse Connector
The motherboard provides a standard PS/2® mouse mini DIN connector for
attaching a PS/2
connector.
Keyboard Connector
The motherboard provides a standard PS/2® keyboard mini DIN connector for
attaching a PS/2
connector.
USB 2.0 Connector
The motherboard provides an OHCI (Open Host Controller Interface) Universal
Serial Bus root for attaching USB devices such as keyboard, mouse or other
USB-compatible devices.You can plug the USB device directly into the
connector.
®
mouse.You can plug a PS/2® mouse directly into this
®
keyboard.You can plug a PS/2® keyboard directly into this
Technical Reference Booklet
USB 2.0 Connector DescriptionUSB 2.0 Connector
PINSIGNALDESCRIPTION
1VCC+5V/5VSB (optional)
2-Data 0 Negative Data Channel 0
3+Data0Positive Data Channel 0
4GNDGround
5VCC+5V/5VSB (optional)
6-Data 1Negative Data Channel 1
7+Data 1Positive Data Channel 1
8GNDGround
Serial Port Connectors: COM1
The Port is 16550A high speed communication port that send/receive 16 bytes
FIFOs. You can attach a serial mouse or other serial devices directly to the
connectors.
Video Out Connector
The motherboard provides a Video out port to connect a 15-pin analog
video monitor.
LAN Jack
The motherboard provides one standard RJ-45 jack for connecting to a Local
Area Network (LAN). You can connect a network cable to the LAN jack.
Parallel Port Connector: LPT1
The motherboard provides a 25-pin female centronic connector. A parallel port
is a standard printer port that supports Enhanced Parallel Port (EPP) and
Extended Capabilities Parallel Port (ECP) mode.
Audio Port Connector
Line_Out is a connector for Speakers or Headphones. Line_In is used for
external CD player, tape players, or other audio devices. Mic_In is the
microphone connector.
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The ALC655 embeds an internal analog switch (by driver software) to select
LINE input or Surround output, and to select MIC input or CENTER/LFE output.
1010
10
1010
AUDIO CONFIGURATION
After installing the audio driver, you can select 2/4/6 channel surround
audio output in the software utility and then connect surround speakers to
appropriate audio ports.
There are two ways to obtain 2/4/6 channel surround audio output:
1. Using the 4/6 surround audio output of the back panel only. All surround
speaker connect to this audio connector.
2. Using the S-Bracket (optional cable). You have installed the S-Bracket into
the computer. Connect two front speakers to back panel’s “Line Out” port,
and the rest of speakers to S-Bracket. For connection details, please refer to
page 15.
SPEAKER CONFIGURATION
Method 1: 4/6 Surround audio output of back panel only.
After installing the audio drivers, you can attach the speakers for 2-/4-/6-channel
audio output. Always connect the speakers to the LINE OUT connectors.
Different connector configurations for 2-/4-/6-channel operations are listed
below:
2-Channel
In 2-channel configuration,
Line Out, Line In and MIC
functions all exist.
Technical Reference Booklet
4-Channel6-Channel
When set to 4-channel
configuration, Line In
is replaced by Rear
Speaker Out. The Line in
function does not exist.
When set to 6-channel
configuration, Line In is replaced
by Rear Speaker Out. Mic is
replaced by Center/Subwoofer
Speaker Out. Line in and Mic
functions do not exist.
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1111
In the software utility, double click “AC97 Audio configuration” icon from
the window tray on the right bottom.
The “AC97 Audio Configuration” box will appear. Click on the SpeakerConfiguration tab to select the audio mode.
A. When you choose 4-channel mode for 4 speaker output, the selected item
is shown (Figure1).
(Figure1)
B. When you choose 6-channel mode for 5.1 speaker output, the selected
item is shown (Figure2)
(Figure2)
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Method 2: Using S-BRACKET connectors:
The S-Bracket (shown on page 15) is an optional accessory. It gives access to
analog and digital audio output by integrating both SPDIF and analog LINE
OUT connectors. To use the S-Bracket, you should select the correct settings
in the software utility. For information about the setting, refer to selecting 4- or
6- Channel Settings later in the section.
Connector configurations for 4- and 6- channel using S-Bracket are described
below:
4-Channel Analog Audio Output
Back PanelS-Bracket
+
1
(Front channels)
1
SPDIF jack (coaxial)
2
Rear Speaker Out
3
No function
Description:Description:
Description:
Description:Description:
Connect two speakers to the back panel’s Line Out connector and two
speakers to one Line Out connector on the S-Bracket, or connect all four
speakers to one connector on the S-Bracket. If you want to use the LineIn
function, please click the Rear Speaker Out button (shown below).
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Technical Reference Booklet
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