MSI MS-7646M1 User Manual

MS-7646M1 (V1.X) Mainboard

i

Copyright Notice

The material in this document is the intellectual property of the company. We take
every care in the preparation of this document, but no guarantee is given as to the
correctness of its contents. Our products are under continual improvement and we
reserve the right to make changes without notice.

Trademarks

All trademarks are the properties of their respective owners.

Intel® and Pentium® are registered trademarks of Intel Corporation.
AMD, Athlon™, Athlon™ XP, Thoroughbred™, and Duron™ are registered trade­marks of AMD Corporation.
NVIDIA, the NVIDIA logo, DualNet, and nForce are registered trademarks or trade­marks of NVIDIA Corporation in the United States and/or other countries.
PS/2 and OS®/2 are registered trademarks of International Business Machines
Corporation.
Windows® 95/98/2000/NT/XP are registered trademarks of Microsoft Corporation.
Netware® is a registered trademark of Novell, Inc.
Award® is a registered trademark of Phoenix Technologies Ltd.
AMI® is a registered trademark of American Megatrends Inc.

Revision History

Revision Revision History Date
V1.0 First Release February 2010

Technical Support

If a problem arises with your system and no solution can be obtained from the user’s
manual, please contact your place of purchase or local distributor. Alternatively,
please try the following help resources for further guidance.

ii

Safety Instructions

1. Always read the safety instructions carefully.

2. Keep this User’s Manual for future reference.

3. Keep this equipment away from humidity.

4. Lay this equipment on a reliable flat surface before setting it up.

5. The openings on the enclosure are for air convection hence protects the equip
ment from overheating. DO NOT COVER THE OPENINGS.

6. Make sure the voltage of the power source and adjust properly 110/220V be
fore connecting the equipment to the power inlet.

7. Place the power cord such a way that people can not step on it. Do not place
anything over the power cord.

8. Always Unplug the Power Cord before inserting any add-on card or module.

9. All cautions and warnings on the equipment should be noted.

10. Never pour any liquid into the opening that could damage or cause electrical
shock.

11. If any of the following situations arises, get the equipment checked by service
personnel:

The power cord or plug is damaged.
Liquid has penetrated into the equipment.
The equipment has been exposed to moisture.
The equipment does not work well or you can not get it work according to

User’s Manual.

The equipment has dropped and damaged.
The equipment has obvious sign of breakage.

12. DO NOT LEAVE THIS EQUIPMENT IN AN ENVIRONMENT UNCONDITIONED, STOR
AGE TEMPERATURE ABOVE 600 C (1400F), IT MAY DAMAGE THE EQUIPMENT.

CAUTION: Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the
manufacturer.

iii

FCC-B Radio Frequency Interference Statement

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 measures listed
below.

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which

the receiver is connected.

Consult the dealer or an experienced radio/television technician for help.

Notice 1

The changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.

Notice 2

Shielded interface cables and A.C. power cord, if any, must be used in order to
comply with the emission limits.

VOIR LA NOTICE D’INSTALLATION AVANT DE RACCORDER AU RESEAU.

This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.

MS-7646M1

iv

CONTENTS

Copyright Notice..........................................................................................................ii

Trademarks..................................................................................................................ii

Revision History..........................................................................................................ii

Technical Support.......................................................................................................ii

Safety Instructions....................................................................................................iii

FCC-B Radio Frequency Interference Statement.............................................iv

Chapter 1 Getting Started.....................................................................................1-1

Mainboard Specifications.......................................................................1-2

Chapter 2 Hardware Setup...................................................................................2-1

Mainboard Layout...................................................................................2-2

CPU (Central Processing Unit)...............................................................2-3

Memory....................................................................................................2-6

Power Supply..........................................................................................2-8

Back Panel...............................................................................................2-9

Connector...............................................................................................2-11

Jumper...................................................................................................2-16

Slot.........................................................................................................2-17

v

Getting Started

Chapter 1

Getting Started

Thank you for choosing the MS-7646M1 (V1.X) Micro­ATX mainboard. The MS-7646M1 (V1.X) is based on
AMD® RX780 & SB710 chipsets for optimal system
efficiency. Designed to fit the advanced AMD® Phenom/
Athlon 64/ Sempron processors in Socket AM3, the
MS-7646M1 (V1.X) delivers a high performance and
professional desktop platform solution.

1-1

MS-7646M1 Mainboard

Mainboard Specifications

Processor

- Supports 95W AMD® Phenom/ Athlon 64/ Sempron processors

- Supports 4-pin CPU fan pinheader with Fan Speed Control

FSB

- Hyper Transport supports up to 3.0GHz

Chipset

- North Bridge: AMD® RX780

- South Bridge: AMD® SB710

Memory

- DDR3 533/ 667/ 800/ 1066/ 1333 SDRAM (240 pins/ 1.5V)

- 4 DDR3 DIMM slots (8GB Max)

LAN

- Gigabit Fast Ethernet by Realtek® RTL8111DL

IEEE 1394

- Chip integrated by JMicron® JMB381

- Transfer rate is up to 400Mb/s

Audio

- Chip integrated by Realtek® ALC888S

- Flexible 8-channel audio with jack sensing

- Compliant with Azalia 1.0 Spec

SATA

- 6 SATA II ports by AMD® SB710

- Supports 6 SATA devices

- Supports storage and data transfers up to 3Gb/s

RAID

- SATA1~6 support RAID 0/ 1/ 0+1 or JBOD mode by AMD® SB710

1-2

Connectors
Back Panel

- 1 PS/2 mouse port

- 1 PS/2 keyboard port

- 1 LAN jack

- 4 USB ports

- 5 audio jacks

- 1 optical S/PDIF-out jack

- 1 IEEE 1394 port (Optional)

On-Board Pinheader/ Connector

- 3 USB pinheaders

- 1 CD-in connector

- 1 IEEE 1394 pinheader (Optional)

- 1 front panel audio pinheader

- 1 S/PDIF-out pinheader (for HDMI Audio)

Getting Started

Slots

- 1 PCI express x16 slot

- 2 PCI express x1 slot

- 1 PCI slot supports 3.3 V/ 5 V PCI bus interface

Form Factor

- Micro-ATX (24.4cm X 24.4 cm)

Mounting

- 8 mounting holes

1-3

Hardware Setup

Chapter 2

Hardware Setup

This chapter provides you with the information about
hardware setup procedures. While doing the installation,
be careful in holding the components and follow the
installation procedures. For some components, if you
install in the wrong orientation, the components will not
work properly. Use a grounded wrist strap before han­dling computer components. Static electricity may dam­age the components.

2-1

MS-7646M1 Mainboard

B
A
T
T

+

J1394_1 (OPTIONAL)

AMD RX780

AMD SB710

Mainboard Layout

T: MOUSE
B: KEYBOARD

PWR1

T: IEEE 1394 PORT (OPTIONAL)
B: USB PORTS

T: LAN JACK
B: USB PORTS

CPUFAN1

T: LINE-OUT
M: SS-OUT
B: LINE-IN
T: CS-OUT
M: RS-OUT
B: S/PDIF-OUT

RTL8111DL

JMB381

ALC888S

JSPDOUT1

PCIE1_X1

PCIE16_X1

PCIE1_X2
PCI1

JAUD1

JCD1

JSMI1

JSPI1

JUSB2 JUSB3

JUSB1

MS-7646M1 (V1.X)

Micro-ATX Mainboard

ATXPWR1

DIMM1

DIMM3

DIMM2

DIMM4

SATA1 SATA2 SATA3

JBAT1

JFP1

2-2

Hardware Setup

CPU (Central Processing Unit)

The mainboard supports 95W AMD® Phenom/ Athlon 64/ Sempron processors in
Socket AM3. The Socket AM3 offers easy CPU installation. When you are installing
the CPU, make sure the CPU has a heat sink and a cooling fan attached on the top to
prevent overheating. If you do not have the heat sink and cooling fan, contact your
dealer to purchase and install them before turning on the computer.

Important

Overheating

Overheating will seriously damage the CPU and system. Always make
sure the cooling fan can work properly to protect the CPU from
overheating. Make sure that you apply an even layer of thermal paste
(or thermal tape) between the CPU and the heatsink to enhance heat
dissipation.

Replacing the CPU

While replacing the CPU, always turn off the power supply or unplug the
power supply’s power cord from the grounded outlet first to ensure the
safety of CPU.

Overclocking

This mainboard is designed to support overclocking. However, please
make sure your components are able to tolerate such abnormal setting,
while doing overclocking. Any attempt to operate beyond product speci­fications is not recommended. We do not guarantee the damages or
risks caused by inadequate operation or beyond product specifications.

2-3

MS-7646M1 Mainboard

Open the lever

Gold arrow

Gold arrow

Gold arrow

Correct CPU

O

Incorrect CPU

the lever

CPU Installation Procedures for Socket AM3

1. Please turn off the power and unplug

the power cord before installing the
CPU.

Sliding
the plate

2. Pull the lever sideways away from

the socket. Make sure that you raise
the lever up to a 90-degree angle.

90 degree

3. Look for the gold arrow on the CPU.

The gold arrow should point as
shown in the picture. The CPU can
only fit in the correct orientation.
Lower the CPU down onto the
socket.

4. If the CPU is correctly installed, the

pins should be completely embedded
into the socket and can not be seen.
Please note that any violation of the
correct installation procedures may
cause permanent damage to your
mainboard.

5. Press the CPU down firmly into the

socket and close the lever. As the
CPU is likely to move while the lever
is being closed, always close the
lever with your fingers pressing
tightly on top of the CPU to make
sure the CPU is properly and com­pletely embedded into the socket.

placement

placement

Press down
the CPU

Close

2-4

Hardware Setup

Installing CPU Cooler Set

When you are installing the CPU, make sure the CPU has a heat sink and a cooling fan
attached on the top to prevent overheating. If you do not have the heat sink and
cooling fan, contact your dealer to purchase and install them before turning on the
computer.

1.Position the cooling set onto the

retention mechanism. Hook one end
of the clip to hook first.

3.Fasten down the lever. 4.Attach the CPU Fan cable to the CPU

2. Then press down the other end of
the clip to fasten the cooling set on
the top of the retention mechanism.
Locate the Fix Lever and lift up it .

fan connector on the mainboard.

Important

Mainboard photos shown in this section are for demonstration of the
CPU/ cooler installation only. The appearance of your mainboard may
vary depending on the model you purchase.

2-5

MS-7646M1 Mainboard

Installed

Memory

These DIMM slots are intended for memory modules.

DDR3

240 pins, 1.5V

64x2=128 pins56x2=112 pins

Dual-Channel Memory Population Rules

In Dual-Channel mode, the memory modules can transmit and receive data with two
data bus lines simultaneously. Enabling Dual-Channel mode can enhance the system
performance. Please refer to the following illustrations for population rules under
Dual-Channel mode.

DIMM1
DIMM2
DIMM3
DIMM4

DIMM1
DIMM2
DIMM3
DIMM4

Empty

2-6

Hardware Setup

Installing Memory Modules

1. The memory module has only one notch on the center and will only fit in the right
orientation.

2. Insert the memory module vertically into the DIMM slot. Then push it in until the
golden finger on the memory module is deeply inserted in the DIMM slot. The plastic
clip at each side of the DIMM slot will automatically close when the memory module
is properly seated.

Important

You can barely see the golden finger if the memory module is properly
inserted in the DIMM slot.

3. Manually check if the memory module has been locked in place by the DIMM slot
clips at the sides.

Volt Notch

Important

1. In Dual-Channel mode, make sure that you install memory modules of
the same type and density in different channel DIMM slots.

2. To enable successful system boot-up, always insert the memory modules
into the DIMM1 first.

3. Due to the chipset resource deployment, the system density will only be
detected up to 7+GB (not full 8GB) when each DIMM is installed with a
2GB memory module.

2-7

MS-7646M1 Mainboard

Power Supply

ATX 24-Pin Power Connector: ATXPWR1

This connector allows you to connect an ATX 24-pin power supply.
To connect the ATX 24-pin power supply, make sure the plug of the
power supply is inserted in the proper orientation and the pins are
aligned. Then push down the power supply firmly into the connector.
You may use the 20-pin ATX power supply as you like. If you’d like
to use the 20-pin ATX power supply, please plug your power sup­ply along with pin 1 & pin 13 (refer to the image at the right hand).
There is also a foolproof design on pin 11, 12, 23 & 24 to avoid wrong installation.

Pin Definition

12

1

24

13

PIN SIGNAL

1 +3.3V
2 +3.3V
3 GND
4 +5V
5 GND
6 +5V
7 GND
8 PWR OK
9 5VSB
10 +12V
11 +12V
12 +3.3V

PIN SIGNAL

13 +3.3V
14 -12V
15 GND
16 PS-ON#
17 GND
18 GND
19 GND
20 Res
21 +5V
22 +5V
23 +5V
24 GND

ATXPWR1

pin 13

pin 12

ATX 12V Power Connector: PWR1

This power connector is used to provide power to the CPU.

3 4

1 2

PWR1

Pin Definition

PIN SIGNAL

1 GND
2 GND
3 12V
4 12V

Important

1. Make sure that all the connectors are connected to proper power sup­plies to ensure stable operation of the mainboard.

2. Power supply of 350 watts (and above) is highly recommended for
system stability.

2-8

Back Panel

Hardware Setup

Mouse

IEEE 1394

(Optional)

LAN

Line-Out

SS-Out

CS-Out

RS-Out

Keyboard USB

Line-In

Optical
S/PDIF-Out

Mouse/ Keyboard

The standard PS/2® mouse/keyboard DIN connector is for a PS/2® mouse/keyboard.

IEEE 1394 Port (Optional)

The 1394 port on the back panel provides connection to 1394 devices.

USB Port

The USB (Universal Serial Bus) port is for attaching USB devices such as keyboard,
mouse, or other USB-compatible devices.

LAN

The standard RJ-45 LAN jack is for connection to Local Area Network (LAN). You
can connect a network cable to it.

Link IndicatorActivity Indicator

LED Color LED State Condition

Off LAN link is not established.

Left Green On (steady state) LAN link is established.

On (brighter & pulsing)The computer is communicating with another computer on the LAN.

Green Off 10 Mbit/sec data rate is selected.

Right On 100 Mbit/sec data rate is selected.

Orange On 1000 Mbit/sec data rate is selected.

2-9

MS-7646M1 Mainboard

Audio Ports

These audio connectors are used for audio devices. You can differentiate the color
of the audio jacks for different audio sound effects.

Line-Out (Green) - Line Out, is a connector for speakers or headphones.
SS-Out (Gray) - Side-Surround Out 7.1 channel mode.
Line-In (Blue) - Line In, is used for external CD player, tape player or other

audio devices.

CS-Out (Orange) - Center/ Subwoofer Out in 5.1/ 7.1 channel mode.
RS-Out (Black) - Rear-Surround Out in 4/ 5.1/ 7.1 channel mode.
Optical S/PDIF-Out - This S/PDIF (Sony & Philips Digital Interconnect Format)

connector is provided for digital audio transmission to external speakers
through an optical fiber cable.

2-10

Connector

SPI Flash ROM Connector: JSPI1

This connector is used to flash SPI flash ROM.

1 2

9 10

JSPI1

Pin Description Pin Description

1 VCC3_SB 2 VCC3_SB
3 SPI_MISO_F 4 SPI_MOSI_F
5 SPI_CS0_F# 6 SPI_CLK_F
7 GND 8 GND
9 SPI_HOLD# 10 NC

Hardware Setup

Pin Definition

Serial ATA Connector: SATA1~6

This connector is a high-speed Serial ATA interface port. Each connector can con­nect to one Serial ATA device.

SATA6

SATA5

SATA4

SATA3

SATA2

SATA1

Important

Please do not fold the Serial ATA cable into 90-degree angle. Otherwise,
data loss may occur during transmission.

2-11

MS-7646M1 Mainboard

Fan Power Connector: CPUFAN1

The fan power connectors support system cooling fan with +12V. When connecting
the wire to the connectors, always note that the red wire is the positive and should
be connected to the +12V; the black wire is Ground and should be connected to GND.
If the mainboard has a System Hardware Monitor chipset onboard, you must use a
specially designed fan with speed sensor to take advantage of the CPU fan control.

C

S

O

E

N

N

T

+

S

G

R

1

O

N

O

2

R

D

V

L

CPUFAN1

Important

1. Please refer to the recommended CPU fans at processor’s official
website or consult the vendors for proper CPU cooling fan.

2. CPUFAN1 supports fan control. You can activate the Smart Fan function
in the BIOS Setup Utility to automatically control the CPU fan speed
according to the actual CPU temperature.

3. Fan/heatsink with 3 or 4 pins are both available for CPUFAN1.

2-12

CD-In Connector: JCD1

This connector is provided for external audio input.

GND

Hardware Setup

L

R

JCD1

Front Panel Audio Connector: JAUD1

This connector allows you to connect the front panel audio and is compliant with
Intel® Front Panel I/O Connectivity Design Guide.

2
1

JAUD1

HD Audio Pin Definition

PIN SIGNAL DESCRIPTION

1 MIC_L Microphone - Left channel
2 GND Ground
3 MIC_R Microphone - Right channel
4 NC No control
5 LINE out_R Analog Port - Right channel
6 MIC_JD Jack detection return from front panel microphone JACK1
7 Front_JD Jack detection sense line from the High Definition Audio CODEC

jack detection resistor network
8 NC No control
9 LINE out_L Analog Port - Left channel
10 LINEout_JD Jack detection return from front panel JACK2

10

9

2-13

MS-7646M1 Mainboard

S/PDIF-Out Connector: JSPDOUT1

This connector is used to connect S/PDIF (Sony & Philips Digital Interconnect Format)
interface for digital audio transmission.

VCC

SPDIF

GND

JSPDOUT1

Front USB Connector: JUSB1~3

This connector, compliant with Intel® I/O Connectivity Design Guide, is ideal for con­necting high-speed USB interface peripherals such as USB HDD, digital cameras,
MP3 players, printers, modems and the like.

Pin Definition

PIN SIGNAL PIN SIGNAL

2

1

JUSB1~3

10

9

1 VCC 2 VCC
3 USB0- 4 USB1­5 USB0+ 6 USB1+
7 GND 8 GND
9 Key (no pin) 10 USBOC

Important

Note that the pins of VCC and GND must be connected correctly to
avoid possible damage.

2-14

Hardware Setup

Front Panel Connectors: JFP1

The mainboard provides one front panel connector for electrical connection to the
front panel switches and LEDs. JFP1 is compliant with Intel® Front Panel I/O Connec­tivity Design Guide.

2 10
1 9

JFP1

Pin Definition

PIN SIGNAL DESCRIPTION

1 HD_LED + Hard disk LED pull-up
2 FP PWR/SLP MSG LED pull-up
3 HD_LED - Hard disk active LED
4 FP PWR/SLP MSG LED pull-up
5 RST_SW - Reset Switch low reference pull-down to GND
6 PWR_SW + Power Switch high reference pull-up
7 RST_SW + Reset Switch high reference pull-up
8 PWR_SW - Power Switch low reference pull-down to GND
9 RSVD_DNU Reserved. Do not use.

IEEE 1394 Connector: J1394_1 (Optional)

This connector allows you to connect the IEEE 1394 device via an optional IEEE 1394
bracket.

Pin Definition

PIN SIGNAL PIN SIGNAL

2

1

10
9

J1394_1

1 TPA+ 2 TPA­3 Ground 4 Ground
5 TPB+ 6 TPB­7 Cable power 8 Cable power
9 Key (no pin) 10 Ground

2-15

MS-7646M1 Mainboard

Jumper

Clear CMOS Jumper: JBAT1

There is a CMOS RAM onboard that has a power supply from an external battery to
keep the data of system configuration. With the CMOS RAM, the system can auto­matically boot OS every time it is turned on. If you want to clear the system configuration,
set the jumper to clear data.

1

1

Important

1

3

3

Clear DataKeep DataJBAT1

You can clear CMOS by shorting 2-3 pin while the system is off. Then
return to 1-2 pin position. Avoid clearing the CMOS while the system is
on; it will damage the mainboard.

2-16

Hardware Setup

Slot

PCI (Peripheral Component Interconnect) Express Slot

The PCI Express slot supports the PCI Express interface expansion card. The PCI
Express x16 slot supports up to 4.0 GB/s transfer rate. The PCI Express x1 slot

supports up to 250 MB/s transfer rate.

PCI Express x16 Slot

PCI Express x1 Slot

PCI (Peripheral Component Interconnect) Slot

The PCI slot supports LAN card, SCSI card, USB card, and other add-on cards that
comply with PCI specifications.

32-bit PCI Slot

Important

When adding or removing expansion cards, make sure that you unplug
the power supply first. Meanwhile, read the documentation for the ex­pansion card to configure any necessary hardware or software settings
for the expansion card, such as jumpers, switches or BIOS configuration.

PCI Interrupt Request Routing

The IRQ, acronym of interrupt request line and pronounced I-R-Q, are hardware lines
over which devices can send interrupt signals to the microprocessor. The PCI IRQ
pins are typically connected to the PCI bus pins as follows:

Order 1 Order 2 Order 3 Order 4

PCI Slot 1 INT A# INT B# INT C# INT D#

2-17