This publication, including all photographs, illustrations and software, is protected
under international copyright laws, with all rights reserved. Neither this manual, nor
any of the material contained herein, may be reproduced without written consent of
the author.
Version 2.0
Disclaimer
The information in this document is subject to change without notice. The manufacturer makes no representations or warranties with respect to the contents hereof and
specifically disclaims any implied warranties of merchantability or fitness for any
particular purpose. The manufacturer reserves the right to revise this publication and
to make changes from time to time in the content hereof without obligation of the
manufacturer to notify any person of such revision or changes.
Trademark Recognition
Microsoft, MS-DOS and Windows are registered trademarks of Microsoft Corp.
AMD, Phenom, Athlon, Sempron and Duron are registered trademarks of AMD
Corporation.
Other product names used in this manual are the properties of their respective
owners and are acknowledged.
Federal Communications Commission (FCC)
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the 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 the instructions, may cause harmful interference to radio 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 onto an outlet on a circuit different from that to
which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
Shielded interconnect cables and a shielded AC power cable must be employed with
this equipment to ensure compliance with the pertinent RF emission limits governing this device. Changes or modifications not expressly approved by the system’s
manufacturer could void the user’s authority to operate the equipment.
Preface
ii
Declaration of Conformity
This device complies with part 15 of the FCC rules. Operation is subject to the
following conditions:
•This device may not cause harmful interference, and
•This device must accept any interference received, including interference that may cause undesired operation
Canadian Department of Communications
This class B digital apparatus meets all requirements of the Canadian Interferencecausing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Réglement sur
le matériel brouilieur du Canada.
About the Manual
The manual consists of the following:
Chapter 1
Introducing the Motherboard
Chapter 2
Installing the Motherboard
Chapter 3
Using BIOS
Chapter 4
Using the Motherboard Software
Chapter 5
ATI CrossFireX
Hybrid Graphics® Technology
Support
Chapter 6
Setting Up AMD SB750 RAID Con-
figuration
Chapter 7
Setting Up eJIFFY
Chapter 8
Trouble Shooting
TM
Technology &
Describes features of the
motherboard.
Go to
Describes installation of
motherboard components.
Go to
Provides information on using
the BIOS Setup Utility.
Go to
Describes the motherboard soft-
ware
Go to
Describes the ATI CrossFireX
Technology & Hybrid Graphics
Technology
Thank you for choosing the A790GXM-A motherboard. This motherboard is a high
performance, enhanced function motherboard that supports socket for AMD
TM
Phenom
cessors for high-end business or personal desktop markets.
The motherboard incorporates the AMD 780D Northbridge (NB) and SB750
Southbridge (SB) chipsets. The Northbridge supports the HyperTransport
terface. The memory controller supports DDR2 memory DIMM frequencies of
1066*1 (AM2+)/800/667/533/400. It supports four DDR2 slots with maximum
memory size of 32 GB*2. Two PCI Express x16 slots, intended for Graphics Interface, are fully compliant to the PCI Express Gen2 (version 2.0).
The SB750 Southbridge supports two PCI slots which are PCI 2.3 compliant. In
addition, two PCI Express x1 slots are supported, fully compliant to the PCI Express
Gen2 (version 2.0). It integrates USB 2.0 interface, supporting up to twelve functional ports (six USB ports and three USB 2.0 headers support additional six USB
ports).One onboard IDE connector supports two IDE devices in Ultra ATA 133/100/
66/33 modes.
SATA ports with maximum transfer rate up to 3.0 Gb/s each.
There is an advanced full set of I/O ports in the rear panel, including PS/2 mouse and
keyboard connectors,COM1,one VGA port,one HDMI port, one optical SPDIFO
port, six USB ports, two LAN ports and audio jacks for microphone, line-in and 6/8channel High Definition
HyperTransportTM Technology is a point-to-point link between two devices, it
enables integrated circuits to exchange information at much higher speeds than
currently available interconnect technologies.
This board supports CPU up to 140W TDP only.
Chipset
The AMD 780D Northbridge (NB) and SB750 Southbridge (SB) chipsets are
based on an innovative and scalable architecture with proven reliability and
performance.
AMD 780D
(NB)
SB750
(SB)
•One x4 A-Link Express II interface (PCI Express 1.1
compliant) for connection to an AMD Southbridge
•Supports two PCI Express x16 for Graphics Interface,
fully compliant to the PCI Express Generation 2.0 (version 2.0)
•Proven Radeon
TM
graphics powering DirectX®10
•Enhanced Digital Display integration
•Fully ACPI 2.0, OnNow, and IAPC (Instantly Available
PC) power management
•Single chip solution in 55nm, 1.1 V CMOS technology
•Integrated ATI Hybrid Graphics,ATI AvivoTM HD1, ATI
1TM
HD
, Low Power Design, AMD Cool'n'Quiet
TM
2.0, ATI
SurroundViewTM, AMD OverDrive and AMD RAIDXpert
•Compliant with PCI 2.3 specification at 33 MHz
•Supports six Serial ATA devices which speeds up to 3.0
Gb/s
•Complies with SATA 2.5 specification
•Supports both SATA 1.5 and SATA3.0 compliance devices
•Supports AHCI hardware assist to support advanced
features such as NCQ ( Native Command Queuing), Hot
Plug, and Device or Host initiated power Management
(DIIPM/HIPM)
•Integrated USB 2.0 Host Controller supporting up to
twelve USB 2.0 ports
•Integrated IDE controller supports Ultra AT A 133/100/66/
33 modes
TM
Introducing the Motherboard
Memory
•Supports DDR2 1066 (AM2+)/800/667/533/400 DDR2 SDRAM with
Dual-channel architecture
•Accommodates four unbuffered DIMMs
•Up to 8 GB per DIMM with maximum memory size up to 32 GB
Audio
•All DACs support 192K/96K/48K/44.1KHz DAC sample rate
•High-quality analog differential CD input
•Software selectable 2.5V/3.75V VREFOUT
•Meets Microsoft WLP 3.08 audio requirements
•Direct Sound 3D
TM
compatible
Onboard LAN
•Supports PCI ExpressTM 1.1
•Integrated 10/100/1000 transceiver
•Wake-on-LAN and remote wake-up support
Expansion Options
The motherboard comes with the following expansion options:
•Two PCI Express x16 slots for Graphics Interface
•Two PCI Express x1 slots
•Two 32-bit PCI v2.3 compliant slots
•One IDE connector supporting up to two IDE devices
•One floppy disk drive interface
•Six 7-pin SATA connectors
This motherboard supports Ultra DMA bus mastering with transfer rates of
133/100/66/33 MB/s.
Integrated I/O
The motherboard has a full set of I/O ports and connectors:
•Two PS/2 ports for mouse and keyboard
•One serial port
•One VGA port
•One HDMIport
•One optical SPDIFO port
•Six USB ports
•Two LAN ports
•Audio jacks for microphone, line-in and 6/8-channel High Definition
Audio output.
BIOS Firmware
The motherboard uses AMI BIOS that enables users to configure many system
features including the following:
•Power management
•Wake-up alarms
•CPU parameters
•CPU and memory timing
The firmware can also be used to set parameters for different processor clock
speeds.
1. Some hardware specifications and software items are subject to change
without prior notice.
2. Due to chipset limitation, we recommend that motherboard be operated in
the ambiance between 0 and 50°C.
Introducing the Motherboard
3
*
4
Motherboard Components
Introducing the Motherboard
Table of Motherboard Components
p
LABELCOMPONENTS
1. CPU Socket
2. CPU_FAN1
3. DDR2_1~4
4. ATX_POWER
5. IDE1
6. PWR_FAN1
7. FDD
8. SATA1~6
9. RST_BOT
10. PWR_BOT
11. SPK
12. PANEL1
13. F_USB1~3
14. WOL1*
15. CLR_CMOS
16. SPDIFO
17. F_AUDIO1
18. PCI1~2
19. PCIE16X_1~2
20. PCIE1~2
21. ATX4P1
22. SYS_FAN1
23. ATX12V
* Stands for optional components
Socket for AMD PhenomTM processor (socket AM2+)/AMD
AthlonTM 64 X2/AthlonTM 64/Sempron
CPU cooling fan connector
240-pin DDR2 SDRAM slots
Standard 24-
Primary IDE connector
Power cooling fan connector
Floppy disk drive connector
Serial ATA connectors
Reset button
Power on button
Internal speaker header
Front Panel switch/LED header
Front Panel USB headers
Wake On LAN Connector
Clear CMOS jumper
SPDIF out header
Front Panel Audio header
32-bit add-on card slots
PCI Express x16 slots for graphics interface
PCI Express x1 slots
Auxiliary power connector for graphics card
System cooling fan connector
8-pin +12V power connector
in ATX power connector
TM
processors
5
This concludes Chapter 1. The next chapter explains how to install the motherboard.
Introducing the Motherboard
6
Memo
Introducing the Motherboard
Chapter 2
Installing the Motherboard
Safety Precautions
•Follow these safety precautions when installing the motherboard
•Wear a grounding strap attached to a grounded device to avoid damage from static electricity
•Discharge static electricity by touching the metal case of a safely
grounded object before working on the motherboard
•Leave components in the static-proof bags they came in
•Hold all circuit boards by the edges. Do not bend circuit boards
Choosing a Computer Case
There are many types of computer cases on the market. The motherboard complies
with the specifications for the FULL ATX system case. Firstly, some features on the
motherboard are implemented by cabling connectors on the motherboard to indicators and switches on the system case. Make sure that your case supports all the
features required. Secondly, this motherboard supports one floppy diskette drive and
two enhanced IDE drives. Make sure that your case has sufficient power and space for
all drives that you intend to install.
Most cases have a choice of I/O templates in the rear panel. Make sure that the I/O
template in the case matches the I/O ports installed on the rear edge of the
motherboard.
This motherboard carries a FULL ATX form factor of 305 x 244 mm. Choose a case
that accommodates this form factor.
7
Installing the Motherboard in a Case
Refer to the following illustration and instructions for installing the motherboard in
a case.
Most system cases have mounting brackets installed in the case, which correspond
the holes in the motherboard. Place the motherboard over the mounting brackets
and secure the motherboard onto the mounting brackets with screws.
Ensure that your case has an I/O template that supports the I/O ports and expansion
slots on your motherboard.
Installing the Motherboard
8
Do not over-tighten the screws as this can stress the motherboard.
Checking Jumper Settings
This section explains how to set jumpers for correct configuration of the motherboard.
Setting Jumpers
Use the motherboard jumpers to set system configuration options. Jumpers with
more than one pin are numbered. When setting the jumpers, ensure that the jumper
caps are placed on the correct pins.
The illustrations show a 2-pin jumper. When
the jumper cap is placed on both pins, the
jumper is SHORT. If you remove the jumper
cap, or place the jumper cap on just one pin,
the jumper is OPEN.
This illustration shows a 3-pin jumper. Pins
1 and 2 are SHORT.
SHORT OPEN
Installing the Motherboard
Checking Jumper Settings
The following illustration shows the location of the motherboard jumpers. Pin 1 is
labeled.
9
Jumper Settings
JumperType Description
CLR_CMOS
To avoid the system unstability after clearing CMOS, we recommend
users to enter the main BIOS setting page to “Load Default Settings”
and then “Save Changes and Exit”.
3-pin
Clear CMOS
Installing the Motherboard
Setting (default)
1-2: NORMAL
2-3: CMOS CLEAR
Before clearing the
CMOS, make sure to
turn off the system.
1
CLR_CMOS
10
Installing Hardware
Installing the Processor
Caution: When installing a CPU heatsink and cooling fan, make sure
that you DO NOT scratch the motherboard or any of the surfacemount resistors with the clip of the cooling fan. If the clip of the
cooling fan scrapes across the motherboard, you may cause serious
damage to the motherboard or its components.
On most motherboards, there are small surface-mount resistors near
the processor socket, which may be damaged if the cooling fan is
carelessly installed.
Avoid using cooling fans with sharp edges on the fan casing and the
clips. Also, install the cooling fan in a well-lit work area so that you
can clearly see the motherboard and processor socket.
Before installing the Processor
This motherboard automatically determines the CPU clock frequency and system
bus frequency for the processor. You may be able to change the settings in the system
Setup Utility. We strongly recommend that you do not over-clock processors or
other components to run faster than their rated speed.
Warning:
1. Over-clocking components can adversely affect the reliability of the
system and introduce errors into your system. Over-clocking can permanently damage the motherboard by generating excess heat in components that are run beyond the rated limits.
2. Always remove the AC power by unplugging the power cord from
the power outlet before installing or removing the motherboard or
other hardware components.
This motherboard has a socket AM2+/AM2 processor socket. When choosing a
processor, consider the performance requirements of the system. Performance is
based on the processor design, the clock speed and system bus frequency of the
processor
, and the quantity of internal cache memory and external cache memory.
Installing the Motherboard
CPU Installation Procedure
The following illustration shows CPU installation components.
1Install your CPU. Pull up the lever away from
the socket and lift up to 90-degree angle.
2Locate the CPU cut edge (the corner with
the pin hold noticeably missing). Align and
insert the CPU correctly.
3Press the lever down and apply thermal
grease on top of the CPU.
4Put the CPU Fan down on the retention mod-
ule and snap the four retention legs of the
cooling fan into place.
5Flip the levers over to lock the heat sink in
place and connect the CPU cooling Fan power
cable to the CPU fan connector. This completes the installation.
To achieve better airflow rates and heat dissipation, we suggest that you
use a high quality fan with 4800 rpm at least. CPU fan and heatsink
installation procedures may vary with the type of CPU fan/heatsink supplied. The form and size of fan/heatsink may also vary.
Installing Memory Modules
This motherboard accommodates fourmemory modules. It can support four 240-pin
DDR2 1066 (AM2+)/800/667/533/400. The total memory capacity is 32GB*.
11
DDR2 SDRAM memory module table
Memory moduleMemory Bus
DDR2 400 200 MHz
DDR2 533 266 MHzDDR2 667 333 MHzDDR2 800 400 MHz
DDR2 1066 533 MHz
You must install at least one module in any of the four slots. Each module can be
installed with 8 GB of memory.
The four DDR2 memory sockets (DDR2_1, DDR2_2, DDR2_3, DDR2_4) are divided into two channels and each channel has two memory sockets as following:
Channel 0: DDR2_1, DDR2_2
ff
Channel 1: DDR2_3, DDR2_4
ff
Do not remove any memory module from its antistatic packaging until
you are ready to install it on the motherboard. Handle the modules only
by their edges. Do not touch the components or metal parts. Always
wear a grounding strap when you handle the modules.
Installing the Motherboard
12
Installation Procedure
Refer to the following to install the memory modules.
1This motherboard supports unbuffered DDR2 SDRAM only.
2Push the latches on each side of the DIMM slot down.
3Align the memory module with the slot. The DIMM slots are keyed with
notches and the DIMMs are keyed with cutouts so that they can only
be installed correctly.
4Check that the cutouts on the DIMM module edge connector match the
notches in the DIMM slot.
5Install the DIMM module into the slot and press it firmly down until it
seats correctly. The slot latches are levered upwards and latch on to
the edges of the DIMM.
6Install any remaining DIMM modules.
For best performance and compatibility, we recommend that users install
DIMMs in the sequence of DIMM3, DIMM4, DIMM1 and DIMM2.
Recommend configuration for best performance and compatibility
Number of DIMMs DIMM 1DIMM 2DIMM 3DIMM 4AM2AM2+ *
1
2
3
4
Single Channel
Dual Channel
Single Channel
Dual Channel
Unganged Mode
Ganged Mode
Unganged Mode
Ganged Mode
* When Unganged Mode is disabled
: operation with normal performance
: operation with the best performance
HynixHYMP512U64FP8-G7 AB2.0 V
Infinity04701G16CY5U2A2.0 V
KingstonKVR1066D2N7/1G1.9 V
MicronMT8HTF12864AY-1GAE11.9 V
QimondaHYB18T512800CF19F 1.9 V
Apacer78.AAGAL.9KF2.0 V
MicronDMT16HTF25664AY-1GAE11.9 V
Module Name
PQIMEAHR521PA0101-08B11.9 V
Due to the Phenom CPU and memory module limitation, the DRAM
may need to adjust the voltage for supporting DDR2 1066. The memory
modules which can be used stably are listed in the above QVL table for
reference.
Memory
Reco m m end V olt
Installing the Motherboard
Expansion Slots
Installing Add-on Cards
The slots on this motherboard are designed to hold expansion cards and connect
them to the system bus. Expansion slots are a means of adding or enhancing the
motherboard’s features and capabilities. With these efficient facilities, you can
increase the motherboard’s capabilities by adding hardware that performs tasks that
are not part of the basic system.
17
PCIE1~2 Slots
PCIE16X_1~2
Slots
PCI1~2 Slots
The PCI Express x1 slots are fully compliant to the PCI Express
Gen2 (version 2.0).
The PCI Express x16 slots are used to install an external PCI
Express graphics card that is fully compliant to the PCI Express
Gen2 (version 2.0).
This motherboard is equipped with two standard PCI slots. PCI
stands for Peripheral Component Interconnect and is a bus standard for expansion cards, which for the most part, is a supplement of the older ISA bus standard. The PCI slots on this board
are PCI v2.3 compliant.
Before installing an add-on card, check the documentation for
the card carefully. If the card is not Plug and Play, you may have
to manually configure the card before installation.
Installing the Motherboard
18
Follow these instructions to install an add-on card:
1Remove a blanking plate from the system case corresponding to the
slot you are going to use.
2Install the edge connector of the add-on card into the expansion slot.
Ensure that the edge connector is correctly seated in the slot.
3Secure the metal bracket of the card to the system case with a screw.
For some add-on cards, for example graphics adapters and network
adapters, you have to install drivers and software before you can
begin using the add-on card.
Installing the Motherboard
Connecting Optional Devices
Refer to the following for information on connecting the motherboard’s optional
devices:
19
SAT A1~6: Serial A T A connectors
These connectors are used to support the new Serial ATA devices for the highest data
transfer rates (3.0 Gb/s), simpler disk drive cabling and easier PC assembly. It eliminates limitations of the current Parallel ATA interface. But maintains register compatibility and software compatibility with Parallel ATA.
Pin Signal Name
1Ground 2TX+
3TX- 4Ground
5RX- 6RX+
7Ground--
Pin Signal Name
Installing the Motherboard
20
F_USB1~3: Front Panel USB headers
The motherboard has six USB ports installed on the rear edge I/O port array. Additionally, some computer cases have USB ports at the front of the case. If you have
this kind of case, use auxiliary USB connector to connect the front-mounted ports to
the motherboard.
PinSignal Name
1USBPWRFront Panel USB Power
2USBPWRFront Panel USB Power
3USB_FP_P0-USB Port 0 Negative Signal
4USB_FP_P1-USB Port 1 Negative Signal
5USB_FP_P0+USB Port 0 Positive Signal
6USB_FP_P1+USB Port 1 Positive Signal
7GNDGround
8GNDGround
9KeyNo pin
10 USB_FP_OC0Overcurrent signal
Please make sure that the USB cable has the same pin assignment as
indicated above. A different pin assignment may cause damage or
system hang-up.
Function
SPDIFO: SPDIF out header
This is an optional header that provides an S/PDIF (Sony/Philips Digital Interface)
output to digital multimedia device through optical fiber or coaxial connector.
Pin Signal Name Function
1SPDIF SPDIF digital output
2+5VA 5V analog Power
3Key No pin
4 GND Ground
F_AUDIO1: Front Panel Audio header
This header allows the user to install auxiliary front-oriented microphone and lineout ports for easier access.
PinSignal Name
PinSignal NameFunction
1PORT 1L2 AUD_GND
3PORT 1R 4 PRESENCE#
5PORT 2R6 SENSE1_RETURN
7SENSE_SEND 8 KEY
9PORT 2L 10 SENSE2_RETURN
PinSignal Name
Installing the Motherboard
WOL1: Wake On LAN connector (optional)
If you have installed a LAN card, use the cable provided with the card to plug into the
WOL connector onboard. This enables the Wake On LAN (WOL) feature. When
your system is in a power-saving mode, any LAN signal automatically resumes the
system. You must enable this item using the Power Management page of the Setup
Utility in the BIOS. See Chapter 3 for more information.
Pin Signal Name Function
15VSB+5V stand by power
2GNDGround
3Ring#Wake up signal (low active)
21
Installing the Motherboard
22
Installing a Hard Disk Drive/CD-ROM/SAT A Hard Drive
This section describes how to install IDE devices such as a hard disk drive and a CDROM drive.
About IDE Devices
Your motherboard hasoneIDE interface. An IDE ribbon cable supporting two IDE
devices is bundled with the motherboard.
ou must orient the cable connector so that the pin1 (color) edge of the
Y
cable corresponds to the pin 1 of the I/O port connector.
IDE: IDE Connector
This motherboard supports six high data transfer SATA ports with each runs up to 3.0
Gb/s. To get better system performance, we recommend users connect the CD-ROM
to the IDE channel, and set up the hard drives on the SATA ports.
IDE devices enclose jumpers or switches used to set the IDE device as MASTER or
SLAVE. Refer to the IDE device user’s manual. Installing two IDE devices on one
cable, ensure that one device is set to MASTER and the other device is set to SLAVE.
The documentation of your IDE device explains how to do this.
About SAT A Connectors
Your motherboard features six SATA connectors supporting a total of six drives.
SATA refers to Serial ATA (Advanced Technology Attachment) is the standard interface for the IDE hard drives which are currently used in most PCs. These connectors
are well designed and will only fit in one orientation. Locate the SATA connectors on
the motherboard and follow the illustration below to install the SATA hard drives.
Installing Serial A T A Hard Drives
To install the Serial ATA (SATA) hard drives, use the SATA cable that supports the
Serial ATA protocol. This SATA cable comes with a SATA power cable. You can
connect either end of the SATA cable to the SATA hard drive or the connector on the
motherboard.
SATA cable (optional)
SATA power cable (optional)
Installing the Motherboard
Refer to the illustration below for proper installation:
1Attach either cable end to the connector on the motherboard.
2Attach the other cable end to the SATA hard drive.
3Attach the SATA power cable to the SATA hard drive and connect the
other end to the power supply.
This motherboard supports the “Hot-Plug” function.
Installing a Floppy Diskette Drive
FDD: Floppy Disk Connector
Connect the single end of the of the floppy connector to the onboard floppy
connector firstly, and then connect the remaining plugs on the other end to the
floppy drives correspondingly.
You must orient the cable connector so that the pin 1 (color) edge of
the cable corresponds to the pin 1 of the I/O port connector.
23
Installing the Motherboard
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