MSI PRO B660M-A CEC WIFI User manual

1
󸛚󳿜 Contents
Contents
3
4
 10
 11
CPU Socket...............................................................................................................12
DIMM Slots................................................................................................................13
PCI_E1~4: PCIe Expansion Slots..............................................................................14
JFP1, JFP2: Front Panel Connectors.......................................................................15
JAUD1: Front Audio Connector ................................................................................15
SATA5~8, SATA_A1& SATA_B1: SATA 6Gb/s Connectors .......................................16
M2_1~2: M.2 Slot (Key M).........................................................................................16
ATX_PWR1, CPU_PWR1~2: Power Connectors.......................................................17
JUSB1~2: USB 2.0 Connectors.................................................................................18
JUSB3: USB 3.2 Gen 1 Connector ............................................................................18
JUSB4: USB 3.2 Gen 1 Type-C Connector................................................................19
JLPT1: Parallel Port Connector...............................................................................19
CPU_FAN1, PUMP_FAN1, SYS_FAN1~2: Fan Connectors......................................20
JTPM1: TPM Module Connector...............................................................................20
JCI1: Chassis Intrusion Connector...........................................................................21
JDASH1: Tuning controller Connector.....................................................................21
JBAT1: Clear CMOS (Reset BIOS) Jumper...............................................................22
JCOM1: Serial Port Connector.................................................................................22
JRGB1: RGB LED connector.....................................................................................22
JRAINBOW1~2: Addressable RGB LED connectors ................................................23
EZ Debug LED...........................................................................................................23
24
Installing Windows 10/ Windows 11.........................................................................24
Installing Drivers......................................................................................................24
MSI Center................................................................................................................24
Thank you for purchasing the MSI® 
motherboard. This User Guide gives information about
board layout, component overview, BIOS setup and software
installation.
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2Contents
25
BIOS Setup................................................................................................................26
Entering BIOS Setup.................................................................................................26
BIOS User Guide.......................................................................................................26
Resetting BIOS..........................................................................................................27
Updating BIOS...........................................................................................................27
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Contents 

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.
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4


Supports 12th Gen Intel® Core™ Processors
Processor socket LGA1700
* Please go to www.msi.com to get the newest support
status as new processors are released.
 Intel® B660 chipset

4x DDR5 memory slots, support up to 128GB*
Supports 1R 4800 MHz (by JEDEC & POR)
Max overclocking frequency:
1DPC 1R Max speed up to 6200+ MHz
1DPC 2R Max speed up to 5200+ MHz
2DPC 1R Max speed up to 4000+ MHz
2DPC 2R Max speed up to 4000+ MHz
Supports Intel® XMP 3.0 OC
Supports Dual Controller Dual-Channel mode
Supports non-ECC, un-buffered memory
*Please go to www.msi.com for more information on
compatible memory

4x PCIe x16 slots
PCI_E1 (From CPU)
Support PCIe 4.0 x16
PCI_E2 ~4 (From B660 chipset)
Support PCIe 3.0 x1

1x HDMI 2.1 with HDR port, supports a maximum
resolution of 4K 60Hz */**
* Available only on processors featuring integrated
graphics.
** Graphics specifications may vary depending on the
CPU installed.
 Realtek® ALC897 Codec
7.1-Channel High Definition Audio
 1x Realtek® 8125BG 2.5Gbps LAN controller
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 
Continued from previous page


Intel® Wi-Fi 6
The Wireless module is pre-installed in the M.2
(Key-E) slot
Supports MU-MIMO TX/RX, 2.4GHz/ 5GHz (160MHz)
up to 2.4Gbps
Supports 802.11 a/ b/ g/ n/ ac/ ax
Supports Bluetooth® 5.2

4x SATA 6Gb/s ports (SATA5~8, from B660 Chipset)*
2x SATA 6Gb/s ports (SATA_A1 & SATA_B1, from
Asmedia ASM1061)
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)*
Supports PCIe 4.0x4
Supports SATA 6Gb/s
Supports 2242/ 2260/ 2280 storage devices
Intel® Optane™ Memory Ready for M2_2 slot
Support Intel® Smart Response Technology for Intel
Core™ processors
* SATA7 will be unavailable when installing M.2 SATA
SSD in the M2_2 slot.

Supports RAID 0, RAID 1, RAID 5 and RAID 10 for
SATA storage devices*
*SATA_A1 & SATA_B1 do not support RAID function.

Intel® B660 Chipset
2x USB 3.2 Gen 2 10Gbps (Type-A+Type-C) ports
on the back panel
3x USB 3.2 Gen 1 5Gbps ports (2 Type-A ports
and 1 Type-C port available through the internal
USB connectors)
6x USB 2.0 ports (2 Type-A ports on the back
panel and 4 ports available through the internal
USB connectors)
Asmedia ASM1074
4x USB 3.2 Gen 1 5Gbps Type-A ports on the
back panel
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
Continued from previous page

1x 24-pin ATX main power connector
1x 8-pin ATX 12V power connector
1x 4-pin ATX 12V power connector
6x SATA 6Gb/s connectors
2x M.2 slots (M-Key)
1x USB 3.2 Gen 1 5Gbps Type-C port
1x USB 3.2 Gen 1 5Gbps connectors (supports
additional 2 USB 3.2 Gen 1 5Gbps ports)
2x USB 2.0 connectors (supports additional 4 USB
2.0 ports)
1x 4-pin CPU fan connector
1x 4-pin water-pump fan connector
2x 4-pin system fan connectors
1x Front panel audio connector
2x System panel connectors
1x Parallel port connector
1x Serial port connector
1x Chassis Intrusion connector
1x Clear CMOS jumper
1x TPM module connector
1x Tuning controller connector

1x 4-pin RGB LED connector
2x 3-pin RAINBOW LED connectors
4x EZ Debug LED


1x PS/2 keyboard/ mouse combo port
2x USB 2.0 Type-A ports
1x HDMI port
4x USB 3.2 Gen 1 5Gbps Type-A ports
1x LAN (RJ45) port
1x USB 3.2 Gen 2 10Gbps Type-A port
1x USB 3.2 Gen 2 10Gbps Type-C port
2x Wi-Fi Antenna connectors
3x audio jacks
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 
Continued from previous page
 NUVOTON NCT6687D Controller Chip

CPU/ System/ Chipset temperature detection
CPU/ System/ Pump fan speed detection
CPU/ System/ Pump fan speed control
 Micro-ATX Form Factor
9.6 in. x 9.6 in. (24.4 cm x 24.4 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

LAN Manager
Mystic Light
Ambient Devices
Frozr AI Cooling
User Scenario
True Color
Live Update
Hardware Monitoring
Super Charger
Speed Up
Smart Image Finder
MSI Companion
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Continued from previous page

Audio
Audio Boost
Network
2.5G LAN
LAN Manager
Intel WiFi
Cooling
M.2 Shield Frozr
7W/mK MOSFET thermal pad
Pump Fan
Smart Fan Control
LED
Mystic Light
Mystic Light Extension(RGB)
Mystic Light Extension(RAINBOW)
Mystic Light Extension
Ambient Devices Support
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 
Continued from previous page

Performance
Lightning Gen 4 PCI-E Slot
Lightning Gen 4 M.2
Memory Boost
Core Boost
Game Boost
USB 3.2 Gen 2 10G
USB with Type A+C
Front USB Type-C
Dual CPU Power
2oz Copper thickened PCB
Protection
PCI-E Steel Armor
Experience
MSI Center
Click BIOS 5
EZ M.2 Clip
Forzr AI Cooling
CPU Cooler Tuning
EZ DEBUG LED
App Player
Tile
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10 


 
Off No link
Yellow Linked
Blinking Data activity

 
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
PS/2 Combo port 2.5 Gbps LAN
USB 2.0 Type-A
Line-in
Mic-in
Line-out
USB 3.2 Gen 2
10Gbps Type-A
USB 3.2 Gen 2
10Gbps Type-C
Wi-Fi Antenna
connectors
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 
SATA_A
SATA_B
M2_2
JFP2
JTPM1
JRGB1


JBAT1
M2_1
SYS_FAN2 JUSB4
JUSB3
JUSB2
JUSB1
JCOM1
JLPT1
CPU_FAN1
PUMP_FAN1
SYS_FAN1
PCI_E1
PCI_E2
PCI_E3
JCI1
PCI_E4
JAUD1
Processor Socket
CPU_PWR1
CPU_PWR2
JRAINBOW1
JDASH1
JRAINBOW2 JFP1
ATX_PWR1
DIMMB1
DIMMB2
DIMMA1
DIMMA2

* Distance from the center of the CPU to the nearest DIMM slot.
52mm*
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12 

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
4

57
8
9
3
2
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13
 

Please install the memory module into the DIMM slot as shown below.

DIMMB2
DIMMA2 DIMMA2
DIMMB2
DIMMB1
DIMMA2
DIMMA1
1
2
3
2
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14 


 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
 to set the memory
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.
 For a single PCIe x16 expansion card installation with optimum performance, using
the  slot is recommended.
: PCIe 4.0 x16 (From CPU)
: PCIe 3.0 x1 (From B660 chipset)
: PCIe 3.0 x1 (From B660 chipset)
: PCIe 3.0 x1 (From B660 chipset)
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15
 

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
JFP2 1
+
+- -
Speaker
Buzzer 1 Speaker - 2 Buzzer +
3 Buzzer - 4 Speaker +
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
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 

These connectors are SATA 6Gb/s interface ports. Each connector can connect to one
SATA device.
SATA5
SATA7
SATA6
SATA_B1
SATA_A1
SATA8


 SATA7 will be unavailable when installing M.2 SATA SSD in the M2_2 slot.
 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)
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17
 

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
3
2 1
4CPU_PWR2 1 Ground 3 +12V
2 Ground 4 +12V
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18 

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
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19
 

This connector allows you to connect USB 3.2 Gen 1 Type-C connector on the front
panel. The connector possesses a foolproof design. When you connect the cable, be
sure to connect it with the corresponding orientation.
JUSB4
USB Type-C Cable
USB Type-C port on the
front panel
1
2 26
25
1 RSTB# 2 AFD# 3 PRND0
4 ERR# 5 PRND1 6 PINIT#
7 PRND2 8 LPT_SLIN# 9 PRND3
10 Ground 11 PRND4 12 Ground
13 PRND5 14 Ground 15 PRND6
16 Ground 17 PRND7 18 Ground
19 ACK# 20 Ground 21 BUSY
22 Ground 23 PE 24 Ground
25 SLCT 26 No Pin

This connector allows you to connect the optional parallel port with bracket.
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20 
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
PUMP_FAN1 PWM mode 3A 36W
SYS_FAN1~2 DC mode 1A 12W
1

1 Ground 2 Voltage Control
3 Sense 4 NC
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