MSI MS7797 User manual
Thank you for choosing the 7797 v1.X series Micro-ATX
mainboard. The Series mainboards are based on Intel®
B75 chipset for optimal system eciency. Designed to
t the advanced Intel® LGA1155 processor, the Series
mainboards deliver a high performance and professional
desktop platform solution.
Chapter 1
Getting Started
1-2
Getting Started
Assembly Precautions
The components included in this package are prone to damage from electrostatic
discharge (ESD). Please adhere to the following instructions to ensure successful
computer assembly.
Always turn o the power supply and unplug the power cord from the power outlet
before installing or removing any computer component.
Ensure that all components are securely connected. Loose connections may cause
the computer to not recognize a component or fail to start.
Hold the mainboard by the edges to avoid touching sensitive components.
It is recommended to wear an electrostatic discharge (ESD) wrist strap when handling
the mainboard to prevent electrostatic damage. If an ESD wrist strap is not available,
discharge yourself of static electricity by touching another metal object before han-
dling the mainboard.
Store the mainboard in an electrostatic shielding container or on an antistatic pad
whenever the mainboard is not installed.
Before turning on the computer, ensure that there are no loose screws or metal com-
ponents on the mainboard or anywhere within the computer case.
Do not use the computer in a high-temperature environment.
Do not boot the computer before installation is completed. This could cause perma-
nent damage to the components as well as injury to the user.
If you need help during any installation step, please consult a certied computer tech-
nician.
Important
A screwdriver (not included) may be required for computer assembly.
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7797
Chapter 1
Mainboard Specications
Processor Support
Support 3rd Generation Intel® Core™ i7/ Core™ i5/ Core™ i3/ Pentium®/ Celeron®
Processors for LGA 1155 socket
Chipset
Intel® B75 chipset
Supports Intel® SBA
Memory Support
2x DDR3 DIMMs support DDR3 1600/ 1333/ 1066 DRAM (16GB Max.)
Supports Dual-Channel mode
LAN
Supports LAN 10/100/1000 Fast Ethernet by Realtek® RTL8111E
Audio
Integrated HD audio codec by Realtek® ALC887
6-channel audio with jack sensing
SATA
1x SATA 6Gb/s port (SATA1) by Intel® B75
3x SATA 3Gb/s ports (SATA2~4) by Intel® B75
USB 3.0
4x USB 3.0 ports by Intel® B75
Connectors
Back panel
1x PS/2 mouse port
1x PS/2 keyboard port
4x USB 2.0 ports
2x USB 3.0 ports
1x LAN port
1x HDMI port
1x VGA port
3x audio ports
On-Board
2x USB 2.0 connectors
2x USB 3.0 ports
1x Front Panel Audio connector
Slots
1x PCIe 3.0 x16 slot
2x PCIe 2.0 x1 slots
Form Factor
Micro-ATX (24.4 cm X 21.4 cm)
Mounting Screw Holes
6x mounting holes
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1-4
Getting Started
Connectors Quick Guide
Back Panel
CPU
CPU_FAN1
ATX_CPU1
ATX_POWER1
SATA1
F_PANEL1
F_AUDIO1
PCIEX1_2
F_USB2
SATA2~4
ME_LOCK1
DDR3
F_USB1
F_USB30_1
F_USB30_2
JBAT1
PCIEX1_1
PCIEX16_1
CLR_PWD1
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7797
Chapter 1
Connectors Reference Guide
Port Name Port Type Page
Back Panel 1-6
ATX_CPU1 ATX 4-pin Power Connector 1-13
ATX_POWER1 ATX 24-pin Power Connector 1-13
CLR_PWD1 Clear BIOS Password Jumper 1-22
CPU CPU & Cooler Installation 1-9
CPU_FAN1 Fan Power Connector 1-18
DDR3 DDR3 DIMMs 1-14
F_AUDIO1 Front Panel Audio Connector 1-18
F_PANEL1 Front Panel Connector 1-19
F_USB1~2 USB 2.0 Expansion Connectors 1-20
JBAT1 Clear CMOS Jumper 1-21
F_USB30_1~2 USB 3.0 Ports 1-19
ME_LOCK1 Disable ME Jumper 1-21
PCIEX16_1 PCIe x16 Slot 1-16
PCIEX1_1~2 PCIe x1 Slot 1-16
SATA1 SATA 6Gb/s Connector 1-17
SATA2~4 SATA 3Gb/s Connector 1-17
1-6
Getting Started
Back Panel Quick Guide
Mouse/Keyboard
A combination PS/2® mouse/keyboard DIN connector for a PS/2® mouse/keyboard.
LAN
The standard RJ-45 LAN jack is for connecting to
a Local Area Network (LAN).
LED Color LED State Condition
Left Yellow O LAN link is not established.
On(Steady) LAN link is established.
On(ashing) The computer is communicating with another computer on the network.
Right Green O 10 Mbits/sec data rate
On 100 Mbits/sec data rate
Orange On 1000 Mbits/sec data rate
USB 2.0 Port
The USB 2.0 port is for attaching USB 2.0 devices such as keyboard, mouse, or other
USB 2.0-compatible devices.
USB 3.0 Port
USB 3.0 port is backward-compatible with USB 2.0 devices. It supports data transfer
rate up to 5 Gbit/s (SuperSpeed).
Important
In order to use USB 3.0 devices, you must connect to a USB 3.0 port. If a USB cable is
used, it must be USB 3.0 compliant.
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Yellow Green/ Orange
Line-In
Line-Out
Mic
USB 3.0 Port
LAN
Mouse
USB 2.0 Port
VGA Port
HDMI PortUSB 2.0 PortKeyboard
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7797
Chapter 1
HDMI Port
The High-Denition Multimedia Interface (HDMI) is an all-digital audio-video interface
that is capable of transmitting uncompressed streams. HDMI supports all types of TV
formats, including standard, enhanced, or high-denition video, plus multi-channel
digital audio on a single cable.
VGA Port
The DB15-pin female connector is provided for monitor.
Audio Ports
These connectors are used for audio devices. The color of the jack refers to the function
of the connector.
Blue-Line in: Used for connecting external audio outputting devices.
Green- Line out: Used as a connector for speakers or headphone.
Pink- Mic: Used as a connector for a microphone.
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1-8
Getting Started
CPU (Central Processing Unit)
Introduction to the LGA 1155 CPU
The surface of the LGA 1155 CPU
has two alignment keys and a
yellow triangle to assist in correctly
lining up the CPU for mainboard
placement. The yellow triangle is the
Pin 1 indicator.
Yellow triangle is the
Pin 1 indicator
Alignment Key
Important
Overheating
Overheating can seriously damage the CPU and mainboard. Always make sure the
cooling fans work properly to protect the CPU from overheating. Be sure to apply an
even layer of thermal paste (or thermal tape) between the CPU and the heatsink to
enhance heat dissipation.
Replacing the CPU
When replacing the CPU, always turn o the system’s power supply and unplug the
power supply’s power cord to ensure the safety of the CPU.
Overclocking
This mainboard is designed to support overclocking. Before attempting to overclock,
please make sure that all other system components can tolerate overclocking. Any
attempt to operate beyond product specications is not recommend. MSI does not
guarantee the damages or risks caused by inadequate operation beyond product
specications.
1-9
7797
Chapter 1
CPU & Cooler Installation
When installing a CPU, always remember to install a CPU cooler. A CPU cooler is
necessary to prevent overheating and maintain system stability. Follow the steps below
to ensure correct CPU and CPU cooler installation. Wrong installation can damage both
the CPU and the mainboard.
Unhook and lift the loading lever to
the fully open position.
1. The loading plate should
automatically lift up as the loading
lever is pushed to the fully open
position. Do not touch any of the
CPU socket pins.
2.
Line up the CPU to t the CPU
socket. Be sure to hold the CPU by
the base with the metal contacts
facing downward. The alignment
keys on the CPU will line up with the
edges of the CPU socket to ensure a
correct t.
3. Close the loading plate and remove
the plastic protective cap.
4.
Alignment Key
1-10
Getting Started
Inspect the CPU to check if it is
properly seated in the socket. Press
the loading lever down and lock it
under the retention tab.
5. Evenly spread a thin layer of
thermal paste (or thermal tape) on
the top of the CPU. This will help in
heat dissipation and prevent CPU
overheating.
6.
Locate the CPU fan connector on the
mainboard.
7. Place the heatsink on the mainboard
with the fan’s wires facing towards the
fan connector and the hooks matching
the holes on the mainboard.
8.
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