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 1.0
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
Setting Up AMD SB850 RAID
Configuration
Chatper 6
Setting Up eJIFFY
Chapter 7
Trouble Shooting
Describes features of the motherboard.
Go to
Describes installation of motherboard
components.
Go to
Provides information on using the BIOS
Setup Utility.
Thank you for choosing the A875M-A motherboard. This motherboard is a high
performance, enhanced function motherboard that supports socket for AMD
PhenomTM II/AthlonTM II/SempronTM processors (socket AM3) for high-end business
or personal desktop markets.
1
The motherboard incorporates the AMD 870 Northbridge (NB) and SB850 Southbridge
(SB) chipsets. The Northbridge supports the HyperTransport
memory controller supports DDR3 memory DIMM frequencies of 1600(OC)/1333/
1066/800*1. It supports four DDR3 slots with maximum memory size of 32 GB*2.
One PCI Express x16 slot, intended for Graphics Interface, is fully compliant to the
PCI Express Gen2 (version 2.0). In addition, two PCI Express x1 slots are supported.
The SB850 Southbridge supports three PCI slots which are PCI v2.3 compliant. It
integrates USB 2.0 interface, supporting up to fourteen functional ports (eight USB
ports and three USB 2.0 headers support additional six USB ports).The Southbridge
integrates a Serial ATA host controller, supporting five SATA ports with maximum
transfer rate up to 6.0 Gb/s each and one eSATA port with maximum transfer rate up
to 3.0 Gb/s.
There is an advanced full set of I/O ports in the rear panel, including PS/2 mouse and
keyboard connectors, one serial port, one eSATA port, eight USB ports, one LAN
port and audio jacks for microphone, line-in and 6/8-ch line-out.
*1. Due to the limitation of AMD CPU spec, please refer to Memory QVL
for more information.
*2. Due to the DRAM maximum size (4 GB per dimm) at present, the
memory maximum size we have tested is 16 GB.
TM
3.0 interface. The
Introducing the Motherboard
2
Feature
Processor
This motherboard uses a socket AM3 that carries the following features:
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.
AMD PhenomTM II/AthlonTM II/SempronTM processors
Chipset
The AMD 870 Northbridge (NB) and SB850 Southbridge (SB) chipsets are based
on an innovative and scalable architecture with proven reliability and performance.
AMD 870
(NB)
SB850 (SB)
•Supports one x16 PCI Express (PCI-E) link for graphics.
•Supports “Hyper-Threading” technology CPU
Chipset
Memory
Expansion
Slots
Storage
Audio
LAN
Rear Panel I/O
Internal I/O
Connectors &
Headers
System BIOS
Form Factor
•NB: AMD 870 SB: SB850
•Dual-channel DDR3 memory architecture
•4 x 240-pin DDR3 DIMM sockets support up to 32 GB
•Supports DDR3 1600 (OC)/1333/1066/800 SDRAM
•1 x PCI Express Gen2 x16 slot
•2 x PCI Express Gen2 x1 slots
•3 x PCI slots
•Supported by AMD SB850 Express Chipset
•5 x Serial ATA 6.0 Gb/s Host Controllers
•1 x eSATA 3.0 Gb/s
•Supports RAID 0, 1, 5 and 10
•ALC892 6-Channel / ALC662 6-Channel (Optional)
•Realtek 811 1E PCIE GigaLAN Controller
•1 x PS/2 Keyboard & Mouse connectors
•1 x Serial port
•1 x eSATA port
•8 x USB ports
•1 x RJ45 LAN connector
•1 x Audio port (Line in, microphone in, 6/8-ch line out)
•1 x 24-pin ATX Power Supply connector
•1 x 8-pin ATA connector
•5 x Serial ATA connectors
•3 x USB 2.0 headers support additional 6 USB ports
•1 x Front panel header
•1 x CLR_CMOS jumper
•1 x SPDIF out header
•1 x Front panel audio header
•1 x Speaker header
•CPU_FAN/SYS_F AN/PWR_FAN connectors
•AMI BIOS with 8Mb SPI ROM
•Supports Plug and Play 1.0A, APM 1.2, Multi Boot, DMI
•Supports ACPI revision 1.0 specification
•ATX Size, 305mm x 210mm
Introducing the Motherboard
Motherboard Components
5
The above image is for reference only; please take the actual
motherboard for detailed parts.
Introducing the Motherboard
6
Table of Motherboard Components
LABELCOMPONENTS
1. CPU Socket
Socket for AMD Phenom
TM
II/AthlonTM II/Sempron
TM
processors (socket AM3)
2. CPU_FAN
3. DDR3_1~4
4. ATX_POWER
5. PWR_FAN
6. SATA1~5
7. USBPWR_F1~2
8. F_PANEL
9. SPK
10. F_USB1~4
11. CLR_CMOS
12. SYS_FAN
13. SPDIFO
14. F_AUDIO
15. PCI1~3
16. PCIEX16
17. PCIE1~2
18. USBPWR_R1~2
CPU cooling fan connector
240-pin DDR3 SDRAM slots
Standard 24-pin ATX power connector
Power cooling fan connector
Serial ATA connectors
Front panel USB power select jumpers
Front panel switch/LED header
Speaker header
Front Panel USB headers
Clear CMOS jumper
System cooling fan connector
SPDIF out header
Front panel audio header
32-bit add-on card slots
PCI Express x16 slot for graphics interface
PCI Express x1 slots
Rear USB/PS2 power select jumpers
19. ATX12V 8-pin +12V power connector
This concludes Chapter 1. The next chapter explains how to install the motherboard.
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 ATX system case. 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. 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 an ATX form factor of 305 X 210 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.
Jumper Settings
9
JumperType Description
CLR_CMOS
USBPWR_R1~2 3-pin
USBPWR_F1~2
1. 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 & Exit Setup”.
2. Make sure the power supply provides enough 5VSB voltage before
selecting the 5VSB function.
3. It is required that users place the USBPWR_R1~2 & USBPWR_F1~2
cap onto 2-3 pin rather than 1-2 pin as default if you want to wake up the
computer by USB/PS2 KB/Mouse.
3-pin
3-pin
Clear CMOS
Rear USB PS/2
Power Select
Jumper
Front Panel
USB Power
Select Jumper
Installing the Motherboard
Setting (default)
1-2: NORMAL
2-3: CLEAR
Before clearing the
CMOS, make sure to
turn off the system.
1-2: VCC
2-3: 5VSB
1-2: VCC
2-3: 5VSB
1
CLR_CMOS
1
USBPWR_R1~2
1
USBPWR_F1~2
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 surface-mount 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 these settings by making
changes to jumpers on the motherboard, or changing 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 AM3 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.
Fail-Safe Procedures for Over-clocking
When end-users encounter failure after attempting over-clocking, please take
the following steps to recover from it.
1. Shut down the computer.
2. Press and hold the “Page Up Key (PgUp)” of the keyboard, and then boot the
PC up.
3. Two seconds after the PC boots up, release the “Page Up Key (PgUp)”.
4. The BIOS returns to the default setting by itself.
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 CPUFAN 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 four memory modules. It can support four 240-pin
DDR3 1600(OC)/1333/1066/800. The total memory capacity is 32 GB.
11
DDR3 SDRAM memory module table
Memory moduleMemory Bus
DDR3 800 400 MHz
DDR3 1066 533 MHz
DDR3 1333 667 MHz
DDR3 1600(OC) 800 MHz
You must install at least one module in any of the four slots. Each module can be
installed with 8 GB of memory.
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 DDR3 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 4AM3
1
2
3
4
: operation with normal performance
: operation with the best performance
KingsMax FLGE85F-B8KG9 NEES KingsMax KFB8FNGXF-ANX-12ADS2GB
9
DS2GB
Size
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.
15
PCIE1~2 Slots
PCIEX16 Slot
PCI1~3 Slots
The PCI Express x1 slots are fully compliant to the PCI
Express Gen2 (version 2.0).
The PCI Express x16 slot is 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 three 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
16
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 reference only
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:
17
SAT A1~5: Serial A T A connectors
These connectors are used to support the new Serial ATA devices for the highest data
transfer rates (6.0 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
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
Installing the Motherboard
18
F_USB1~3: Front Panel USB headers
The motherboard has eight 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 GND Ground
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
F_AUDIO: Front Panel Audio header
This header allows the user to install auxiliary front-oriented microphone and lineout ports for easier access.
This section describes how to install a SATA hard drive.
About SAT A Connectors
Your motherboard features five SATA connectors supporting a total of five 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 an SATA power cable. You can
connect either end of the SATA cable to the SATA hard drive or the connector on the
motherboard.
19
SATA cable
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.
(optional)
SATA power cable (optional)
Installing the Motherboard
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