MSI PRO B660M-G DDR4 User manual

1
󸛚󳿜 Contents
Contents
2
3
 8
9
CPU Socket...............................................................................................................10
DIMM Slots................................................................................................................11
DIMM Slots................................................................................................................11
PCI_E1~2: PCIe Expansion Slots..............................................................................11
JFP1, JFP2: Front Panel Connectors.......................................................................12
JAUD1: Front Audio Connector ................................................................................12
SATA5~8: SATA 6Gb/s Connectors...........................................................................13
M2_1~2: M.2 Slots (Key M) .......................................................................................13
ATX_PWR1, CPU_PWR1: Power Connectors...........................................................14
JUSB1~2: USB 2.0 Connectors.................................................................................15
JUSB3: USB 3.2 Gen 1 5Gbps Connector.................................................................15
CPU_FAN1, SYS_FAN1~2: Fan Connectors.............................................................16
JTPM1: TPM Module Connector...............................................................................16
JCI1: Chassis Intrusion Connector...........................................................................17
JCOM1: Serial Port Connector.................................................................................17
JDASH1: Tuning controller Connector.....................................................................17
JBAT1: Clear CMOS (Reset BIOS) Jumper...............................................................18
JRAINBOW1~2: Addressable RGB LED connectors
(PRO B660M-G DDR4) .......................................................................................18
JRGB1: RGB LED connector
(PRO B660M-G DDR4) .......................................................................................19
EZ Debug LED...........................................................................................................19
20
Installing Windows 10 / Windows 11........................................................................20
Installing Drivers......................................................................................................20
MSI Center................................................................................................................20
21
BIOS Setup................................................................................................................22
Entering BIOS Setup.................................................................................................22
BIOS User Guide.......................................................................................................22
Resetting BIOS..........................................................................................................23
Updating BIOS...........................................................................................................23
Thank you for purchasing the MSI® 
motherboard. This User Guide gives
information about board layout, component overview, BIOS
setup and software installation.

2

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.
Ensure that all components are securely connected. Loose connections may cause
the computer to not recognize a component or fail to start.
Hold the motherboard by the edges to avoid touching sensitive components.
It is recommended to wear an electrostatic discharge (ESD) wrist strap when
handling the motherboard to prevent electrostatic damage. If an ESD wrist strap is
not available, discharge yourself of static electricity by touching another metal object
before handling the motherboard.
Store the motherboard in an electrostatic shielding container or on an anti-static
pad whenever the motherboard is not installed.
Before turning on the computer, ensure that there are no loose screws or metal
components on the motherboard or anywhere within the computer case.
Do not boot the computer before installation is completed. This could cause
permanent damage to the components as well as injury to the user.
If you need help during any installation step, please consult a certified computer
technician.
Always turn off the power supply and unplug the power cord from the power outlet
before installing or removing any computer component.
Keep this user guide for future reference.
Keep this motherboard away from humidity.
Make sure that your electrical outlet provides the same voltage as is indicated on
the PSU, before connecting the PSU to the electrical outlet.
Place the power cord such a way that people can not step on it. Do not place
anything over the power cord.
All cautions and warnings on the motherboard should be noted.
If any of the following situations arises, get the motherboard checked by service
personnel:
Liquid has penetrated into the computer.
The motherboard has been exposed to moisture.
The motherboard does not work well or you can not get it work according to
user guide.
The motherboard has been dropped and damaged.
The motherboard has obvious sign of breakage.
Do not leave this motherboard in an environment above 60°C (140°F), it may
damage the motherboard.

3
 


Supports 12th Gen Intel® Core™, Pentium® Gold and
Celeron® Processors*
Processor socket LGA1700
* Please go to msi.com to get the newest support status as
new processors are released.
 Intel® B660 Chipset

2x DDR4 memory slots, support up to 64GB*
Supports ADL-s 1R 2133/2666/2933/3200 MHz*
1DPC 1R Max speed up to 4600+ MHz
1DPC 2R Max speed up to 4000+ MHz
Supports Dual-Channel mode
Supports non-ECC, un-buffered memory
Supports Intel® Extreme Memory Profile (XMP)
*Please refer to www.msi.com for more information on
compatible memory
 1x PCIe 4.0 x16 slot (from CPU)
1x PCIe 3.0 x1 slot (from B660 chipset)


1x VGA port, supports a maximum resolution of 2048x1536
@50Hz, 2048x1280 @60Hz, 1920x1200 @60Hz*/**
1x HDMI 2.1 with HDR port, supports a maximum resolution
of 4K 60Hz*/**
1x DisplayPort 1.4 port, supports a maximum resolution of
4K 60Hz */** (PRO B660M-G DDR4)
* Available for the processor with integrated graphics.
** Graphics specifications may vary depending on the CPU
installed.
 Realtek® ALC897 Codec
7.1-Channel High Definition Audio
LAN 1x Realtek® RTL8125BG 2.5Gbps LAN controller
Continued on next page


Continued from previous page

4x SATA 6Gb/s ports (From B660 chipset)*
2x M.2 slots (Key M)
M2_1 slot (From CPU)
Supports PCIe 4.0 x4
Supports 2242/ 2260/ 2280 storage devices
M2_2 slot (From B660 chipset)* (PRO B660M-G DDR4)
Supports PCIe 4.0 x4
Supports SATA 6Gb/s
Supports 2242/ 2260/ 2280 storage devices
Supports Intel® Optane™ Technology
* SATA7 will be unavailable when installing M.2 SATA SSD in
the M2_2 slot.

Intel® B660 Chipset
6x USB 3.2 Gen 1 5Gbps ports (4 Type-A ports on the
back panel, 2 ports through the internal connector)
2x USB 2.0 Type-A ports on the back panel
USB Hub-GL850G
4x USB 2.0 ports available through internal connectors


1x 24-pin ATX main power connector
1x 8-pin ATX 12V power connector
4x SATA 6Gb/s connectors
2x USB 2.0 connector (support additional 4 USB ports)
1x USB 3.2 Gen 1 5Gbps connector (support additional 2
USB ports)
1x 4-pin CPU fan connector
2x 4-pin system fan connectorx
1x Front panel audio connector
2x System panel connectors
1x Serial port connector
1x TPM module connector
1x Chassis Intrusion connector
1x Clear CMOS jumper
1x JRGB (PRO B660M-G DDR4)
2x JRAINBOW (PRO B660M-G DDR4)
1x Tuning Controller Connector
Continued on next page

5
 
Continued from previous page
 4x EZ Debug LED


1x VGA port
1x HDMI port
1x DisplayPort port (PRO B660M-G DDR4)
1x PS/2 keyboard/ mouse combo port
2x USB 2.0 Type-A ports
4x USB 3.2 Gen1 5Gbps Type-A ports
1x LAN (RJ45) port
3x audio jacks
 NUVOTON NCT6687 Controller Chip


CPU/ System/ Chipset temperature detection
CPU/ System fan speed detection
CPU/ System fan speed control
 M-ATX Form Factor
9.6 in. x 8.7 in. (24.4 cm x 22.0 cm)

1x 256 Mb flash
UEFI AMI BIOS
ACPI 6.4, SMBIOS 3.4
Multi-language

Drivers
MSI CENTER
Intel® Extreme Tuning Utility
CPU-Z MSI GAMING
Google Chrome ™ , Google Toolbar, Google Drive
Norton ™ Internet Security Solution
Continued on next page


Continued from previous page


LAN Manager
Mystic Light (PRO B660M-G DDR4)
Ambient Devices
Frozr AI Cooling
User Scenario
True Color
Live Update
Hardware Monitoring
Super Charger
Devices Speed Up
Smart Image Finder
MSI Companion
System Diagnosis
Continued on next page

7
 
Continued from previous page


Audio
Audio Boost
Cooling
Smart Fan Control
EZ DEBUG LED
Network
2.5G LAN
LAN Manager
Performance
Lightning Gen 4 PCI-E Slot
Memory Boost
Core Boost
Protection
PCI-E Steel Armor
Experience
MSI Center
Frozr AI Cooling
Click BIOS 5
LED
Mystic Light Extension (RGB) (PRO B660M-G DDR4)
Mystic Light Extension (RAINBOW) (PRO B660M-G
DDR4)
Mystic Light SYNC (PRO B660M-G DDR4)
Ambient Devices Support
EZ DEBUG LED

8


Status 
Off No link
Yellow Linked
Blinking Data activity

Status 
Off 10 Mbps connection
Green 100/ 1000 Mbps connection
Orange 2.5 Gbps connection


To configure 7.1-channel audio, you have to connect front audio I/O module to JAUD1
connector and follow the below steps.
 Click on the Realtek HD Audio Manager > Advanced Settings to open the dialog
below.
 Select Mute the rear output device, when a front headphone plugged in.
 Plug your speakers to audio jacks on rear and front I/O panel. When you plug into
a device at an audio jack, a dialogue window will pop up asking you which device
is current connected.
USB 3.2 Gen 1
5Gbps Type A
USB 3.2 Gen 1
5Gbps Type A
USB 2.0 Type A
2.5Gbps LAN
PS/2
Mic
Line-out
Line-in
VGA
DisplayPort
(PRO B660M-G DDR4)

9
 

* Distance from the center of the CPU to the nearest DIMM slot.
BAT1
SYS_FAN1
SYS_FAN2
CPU_FAN1
CPU Socket
JRAINBOW1
(PRO B660M-G
DDR4)
JRAINBOW2
(PRO B660M-G
DDR4)
M2_2
(PRO B660M-G
DDR4)
M2_1
PCI_E1
PCI_E2
DIMMA1
DIMMB1
JBAT1
JDASH1
JFP1
JCOM1
JAUD1
ATX_PWR1
CPU_PWR1
JUSB3
JUSB2
JTPM1
JUSB1
JCI1


JRGB1
(PRO B660M-G
DDR4)

10 

Please install the CPU into the CPU socket as shown below.


 Always unplug the power cord from the power outlet before installing or removing
the CPU.
 Please retain the CPU protective cap after installing the processor. MSI will deal
with Return Merchandise Authorization (RMA) requests if only the motherboard
comes with the protective cap on the CPU socket.
 When installing a CPU, always remember to install a CPU heatsink. A CPU heatsink
is necessary to prevent overheating and maintain system stability.
 
your system.
 Overheating can seriously damage the CPU and motherboard. 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.
 Whenever the CPU is not installed, always protect the CPU socket pins by covering
the socket with the plastic cap.
 If you purchased a separate CPU and heatsink/ cooler, Please refer to the docu-
mentation in the heatsink/ cooler package for more details about installation.
1


57
8
9
3
2

11
 
BAT1

Please install the memory module into the DIMM slot as shown below.

Please install the memory module into the DIMM slot as shown below.


 Always insert memory modules in the 
 To ensure system stability for Dual channel mode, memory modules must be of the
same type, number and density.
 Some memory modules may operate at a lower frequency than the marked value
when overclocking due to the memory frequency operates dependent on its Serial

frequency if you want to operate the memory at the marked or at a higher frequency.
 󽙎
installation or overclocking.
 The stability and compatibility of installed memory module depend on installed
CPU and devices when overclocking.
 Please refer www.msi.com for more information on compatible memory.



 󽙋
unplug the power supply power cable from the power outlet. Read the expansion
card’s documentation to check for any necessary additional hardware or software
changes.
 If you install a large and heavy graphics card, you need to use a tool such as 
 to support its weight to prevent deformation
of the slot.
: PCIe 4.0 x16 slot (From CPU)
: PCIe 3.0 x1 slot (From B660 chipset)
1
2
3
2

12 

These connectors connect to the switches and LEDs on the front panel.
1
2 10
9
+
+
+- -- -
+
Power LED
HDD LED Reset Switch
Reserved
Power Switch 1 HDD LED + 2 Power LED +
3 HDD LED - 4 Power LED -
5 Reset Switch 6 Power Switch
7 Reset Switch 8 Power Switch
9 Reserved 10 No Pin
HDD LED
RESET SW
HDD LED HDD LED -
HDD LED +
POWER LED -
POWER LED +
POWER LED
JFP1

This connector allow you to connect audio jacks on the front panel.
1
2 10
9
1 MIC L 2 Ground
3 MIC R 4 NC
5 Head Phone R 6 MIC Detection
7 SENSE_SEND 8 No Pin
9 Head Phone L 10 Head Phone Detection

13
 

These connectors are SATA 6Gb/s interface ports. Each connector can connect to one
SATA device.
SATA5
SATA7
SATA6
SATA8


 Please do not fold the SATA cable at a 90-degree angle. Data loss may result
during transmission otherwise.
 SATA cables have identical plugs on either sides of the cable. However, it is

saving purposes.

Please install the M.2 solid-state drive (SSD) into the M.2 slot as shown below.
30º30º
3
2
1
(Optional)

 

These connectors allow you to connect an ATX power supply.


Make sure that all the power cables are securely connected to a proper ATX power
supply to ensure stable operation of the motherboard.
24
131
12
ATX_PWR1
1 +3.3V 13 +3.3V
2 +3.3V 14 -12V
3 Ground 15 Ground
4 +5V 16 PS-ON#
5 Ground 17 Ground
6 +5V 18 Ground
7 Ground 19 Ground
8 PWR OK 20 Res
9 5VSB 21 +5V
10 +12V 22 +5V
11 +12V 23 +5V
12 +3.3V 24 Ground
5
41
8
CPU_PWR1
1 Ground 5 +12V
2 Ground 6 +12V
3 Ground 7 +12V
4 Ground 8 +12V

15
 

This connector allows you to connect USB 3.2 Gen 1 5Gbps ports on the front panel.
1
10 11
20
1 Power 11 USB2.0+
2 USB3_RX_DN 12 USB2.0-
3 USB3_RX_DP 13 Ground
4 Ground 14 USB3_TX_C_DP
5 USB3_TX_C_DN 15 USB3_TX_C_DN
6 USB3_TX_C_DP 16 Ground
7 Ground 17 USB3_RX_DP
8 USB2.0- 18 USB3_RX_DN
9 USB2.0+ 19 Power
10 Ground 20 No Pin


Note that the Power and Ground pins must be connected correctly to avoid possible
damage.

These connectors allow you to connect USB 2.0 ports on the front panel.


 Note that the VCC and Ground pins must be connected correctly to avoid possible
damage.
 In order to recharge your iPad,iPhone and iPod through USB ports, please install
MSI® Center utility.
1
2 10
9
1 VCC 2 VCC
3 USB0- 4 USB1-
5 USB0+ 6 USB1+
7 Ground 8 Ground
9 No Pin 10 NC

 
1
212
11
1 SPI Power 2 SPI Chip Select
3
Master In Slave Out
(SPI Data)
4
Master Out Slave In
(SPI Data)
5 Reserved 6 SPI Clock
7 Ground 8 SPI Reset
9 Reserved 10 No Pin
11 Reserved 12 Interrupt Request

This connector is for TPM (Trusted Platform Module). Please refer to the TPM
security platform manual for more details and usages.

Fan connectors can be classified as PWM (Pulse Width Modulation) Mode or DC
Mode. PWM Mode fan connectors provide constant 12V output and adjust fan speed
with speed control signal. DC Mode fan connectors control fan speed by changing
voltage.


You can adjust fan speed in 
1

1 Ground 2 +12V
3 Sense 4 Speed Control Signal
   
CPU_FAN1 PWM mode 2A 24W
SYS_FAN1 DC mode 1A 12W
SYS_FAN2 DC mode 1A 12W
1

1 Ground 2 Voltage Control
3 Sense 4 NC

17
 

This connector allows you to connect the optional serial port with bracket.

This connector is used to connect an optional Tuning Controller module.
1
2 10
9
1 DCD 2 SIN
3 SOUT 4 DTR
5 Ground 6 DSR
7 RTS 8 CTS
9 RI 10 No Pin
1
2 6
5
1 No pin 2 NC
3 MCU_SMB_SCL_M 4 MCU_SMB_SDA_M
5 VCC5 6 Ground

This connector allows you to connect the chassis intrusion switch cable.
Normal
(default) Trigger the chassis intrusion event

 Connect the  connector to the chassis intrusion switch/ sensor on the
chassis.
 Close the chassis cover.
 Go to .
 Set  to .
 Press F10 to save and exit and then press the  key to select .
 Once the chassis cover is opened again, a warning message will be displayed on
screen when the computer is turned on.

 Go to .
 Set  to Reset.
 Press to save and exit and then press the  key to select .

18 

There is CMOS memory onboard that is external powered from a battery located on
the motherboard to save system configuration data. If you want to clear the system
configuration, set the jumpers to clear the CMOS memory.
Keep Data
(default) Clear CMOS/ Reset BIOS

 Power off the computer and unplug the power cord.
 Use a jumper cap to short  for about 5-10 seconds.
 Remove the jumper cap from .
 Plug the power cord and power on the computer.


The JRAINBOW connector allows you to connect the WS2812B Individually
Addressable RGB LED strips 5V.


Do not connect the wrong type of LED strips. The JRGB connector and the JRAINBOW
connector provide different voltages, and connecting the 5V LED strip to the JRGB
connector will result in damage to the LED strip.


 The JRAINBOW connector supports up to 75 LEDs WS2812B Individually Address-
able RGB LED strips (5V/Data/Ground) with the maximum power rating of 3A (5V). In
the case of 20% brightness, the connector supports up to 200 LEDs.
 󽙋
before installing or removing the RGB LED strip.
 Please use MSI’s software to control the extended LED strip.
11 +5V 2 Data
3 No Pin 4 Ground

19
 


The JRGB connector allows you to connect the 5050 RGB LED strips 12V.


 The JRGB connector supports up to 2 meters continuous 5050 RGB LED strips
(12V/G/R/B) with the maximum power rating of 3A (12V).
 󽙋
before installing or removing the RGB LED strip.
 Please use MSI’s software to control the extended LED strip.
11 +12V 2 G
3 R 4 B

These LEDs indicate the status of the motherboard.
 - indicates CPU is not detected or fail.
 - indicates DRAM is not detected or fail.
 - indicates GPU is not detected or fail.
 - indicates booting device is not detected or fail.

20 

Please download and update the latest utilities and drivers at www.msi.com

 Power on the computer.
 Insert the Windows 10 / Windows 11 installation disc/USB into your computer.
 Press the  button on the computer case.
 Press F11 key during the computer POST (Power-On Self Test) to get into Boot
Menu.
 Select the Windows 10 / Windows 11 installation disc/USB from the Boot Menu.
 Press any key when screen shows 
message.
 Follow the instructions on the screen to install Windows 10 / Windows 11.

 Start up your computer in Windows 10 / Windows 11.
 Insert MSI® Drive disc into the optical drive.
 Click the  pop-up notification,
then select  to open the installer. If you turn off the AutoPlay
feature from the Windows Control Panel, you can still manually execute the
 from the root path of the MSI Drive disc.
 The installer will find and list all necessary drivers in the  tab.
 Click the button in the lower-right corner of the window.
 The drivers installation will then be in progress, after it has finished it will prompt
you to restart.
 Click  button to finish.
 Restart your computer.

MSI Center is an application that helps you easily optimize game settings and
smoothly use content creation softwares. It also allows you to control and
synchronize LED light effects on PCs and other MSI products. With MSI Center, you
can customize ideal modes, monitor system performance, and adjust fan speed.

If you would like to know more information about MSI Center, please
refer to
http://download.msi.com/manual/mb/MSICENTER.pdf
or scan the QR code to access.


Functions may vary depending on the product you have.