MSI B660-A PRO DDR4 User manual

PRO B660-A
Motherboard
User Guide
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Manuel d’utilisation
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1
Thank you for purchasing the MSI® motherboard. This User Guide gives
information about board layout, component overview, BIOS setup and software
installation.
Contents
Safety Information........................................................................................................ 3
Specifications................................................................................................................ 4
Back Panel Connectors ............................................................................................... 8
LAN Port LED Status Table .................................................................................... 9
Audio Jacks Connection ......................................................................................... 9
Overview of Components........................................................................................... 10
CPU Socket ........................................................................................................... 11
DIMM Slots............................................................................................................ 12
M2_3: M.2 Slot (Key E).......................................................................................... 12
PCI_E1~5: PCIe Expansion Slots.......................................................................... 13
JFP1, JFP2: Front Panel Connectors................................................................... 13
M2_1~2: M.2 Slots (Key M) ................................................................................... 14
SATA5~8: SATA 6Gb/s Connectors....................................................................... 16
CPU_PWR1~2, ATX_PWR1: Power Connectors................................................... 17
JAUD1: Front Audio Connector ............................................................................ 18
CPU_FAN1, PUMP_FAN1, SYS_FAN1~5: Fan Connectors.................................. 18
JCI1: Chassis Intrusion Connector....................................................................... 19
JBAT1: Clear CMOS (Reset BIOS) Jumper........................................................... 19
JUSB3: USB 3.2 Gen 1 Type-C Connectors.......................................................... 20
JUSB2: USB 3.2 Gen 1 Connector ........................................................................ 20
JUSB1: USB 2.0 Connector .................................................................................. 21
JTPM1: TPM Module Connector........................................................................... 21
JCOM1: Serial Port Connector ............................................................................. 22
JLPT1: Parallel Port Connector ........................................................................... 22
JDASH1: Tuning Controller Connector ................................................................ 23
JTBT1: Thunderbolt Add-on Card Connector ...................................................... 23
EZ Debug LED....................................................................................................... 23
JRGB1: RGB LED connector ................................................................................ 24
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JRAINBOW1~2: Addressable RGB LED connectors ............................................ 24
Installing OS, Drivers & MSI Center.......................................................................... 25
UEFI BIOS.................................................................................................................... 26
BIOS Setup............................................................................................................ 27
Resetting BIOS...................................................................................................... 28
Updating BIOS....................................................................................................... 28
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3
Safety Information
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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Specifications
CPU
Supports 12th Gen Intel® Core™ Processors, Pentium®
Gold and Celeron® Processors
Processor socket LGA1700
* Please go to www.msi.com to get the newest support status as new processors
are released.
Chipset Intel® B660 Chipset
Memory
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 refer to www.msi.com for more information on compatible memory.
Expansion Slots
2x PCIe x16 slots
• PCI_E1 (From CPU)
• Support PCIe 4.0 x16
• PCI_E3 (From B660 chipset)
• Support PCIe 3.0 x4
3x PCIe x1 slots (From B660 chipset)
1x M.2 slot with E-key for PCIe WiFi module only (M2_3)
Multi-GPU Supports AMD CrossFire™ Technology
Onboard Graphics
1x VGA port, supports a maximum resolution of 2048x1536
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 */**
* Available only on processors featuring integrated graphics.
** Graphics specifications may vary depending on the CPU installed.
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SATA Ports 4x SATA 6Gb/s ports (From B660 chipset)*
* SATA7 will be unavailable when installing M.2 SATA SSD in the M2_2 slot.
M.2 SSD Slot
2x M.2 slots (Key M)
• M2_1 slot (From CPU)
• Supports PCIe 4.0 x4
• Supports 2242/ 2260/ 2280/ 22110 storage devices
• M2_2 slot (From B660 chipset)
• Supports PCIe 4.0 x4
• Supports SATA 6Gb/s
• Supports 2242/ 2260/ 2280 storage devices
• Support Intel® Optane™ Memory
Supports Intel® Smart Response Technology for Intel
Core™ processors
* SATA7 will be unavailable when installing M.2 SATA SSD in the M2_2 slot.
RAID Supports RAID 0, RAID 1, RAID 5 and RAID 10 for SATA
storage devices
Audio Realtek® ALC897 Codec
7.1-Channel High Definition Audio
LAN 1x Realtek® 8125BG 2.5Gbps LAN controller
Power Connectors
1x 24-pin ATX main power connector
1x 8-pin ATX 12V power connector
1x 4-pin ATX 12V power connector
Internal USB
Connectors
1x USB 3.2 Gen 1 5Gbps Type-C port (From B660 chipset)
1x USB 3.2 Gen 1 5Gbps connector (From B660 chipset)
• Supports additional 2 USB 3.2 Gen 1 5Gbps ports
1x USB 2.0 connector (From USB Hub GL850G)
• Supports additional 2 USB 2.0 ports
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Fan Connectors
1x 4-pin CPU fan connector
1x 4-pin water-pump fan connector
5x 4-pin system fan connectors
System Connectors
1x Front panel audio connector
2x System panel connectors
1x Chassis Intrusion connector
1x TPM module connector
1x Tuning controller connector
1x TBT connector (Supports RTD3)
Jumpers 1x Clear CMOS jumper
LED Features
1x 4-pin RGB LED connector
2x 3-pin RAINBOW LED connectors
4x EZ Debug LED
Back Panel
Connectors
1x PS/2 keyboard/ mouse combo port
4x USB 2.0 Type-A ports (From B660 chipset)
1x VGA port
1x DisplayPort port
1x HDMI port
1x LAN (RJ45) port
2x USB 3.2 Gen 2 10Gbps Type-A port (From B660 chipset)
1x USB 3.2 Gen 2 10Gbps Type-C port (From B660 chipset)
5x Audio jacks
1x Optical S/PDIF Out connector
I/O Controller NUVOTON NCT6687-R Controller Chip
Hardware Monitor
CPU core/ System/ Chipset/ MOS/ CPU socket
temperature detection
CPU/ System/ Pump fan speed detection
CPU/ System/ Pump fan speed control
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Form Factor ATX Form Factor
12 in. x 9.6 in. (30..5 cm x 24.4 cm)
BIOS Features
1x 256 Mb flash
UEFI AMI BIOS
ACPI 6.4, SMBIOS 3.4
Multi-language
Software
Drivers
MSI Center
Intel Extreme Tuning Utility
CPU-Z MSI GAMING
Google Chrome™, Google Toolbar, Google Drive
Norton™ Internet Security Solution
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Back Panel Connectors
1
910 8 7
5
2 3 54 6
Item Description
1 PS/2 keyboard/ mouse combo port
2 VGA port
3 DisplayPort port
4 2.5 Gbps LAN port
5 USB 2.0 Type-A ports (From B660 chipset)
6 Audio jacks
7 Optical S/PDIF Out connector
8 USB 3.2 Gen 2 10Gbps Type-C port (From B660 chipset)
9 USB 3.2 Gen 2 10Gbps Type-A ports (From B660 chipset)
10 HDMI port
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LAN Port LED Status Table
Link/ Activity LED
Status Description
Off No link
Yellow Linked
Blinking Data activity
Audio jacks to headphone and microphone diagram
Audio jacks to 7.1-channel speakers diagram
Audio Jacks Connection
AUDIO INPUT
Rear Front
Side Center/
Subwoofer
Speed LED
Status Speed
Off 10 Mbps
Green 100/1000 Mbps
Orange 2.5 Gbps
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JUSB3
JUSB2
ATX_PWR1
SYS_FAN1
SYS_FAN2
CPU_FAN1
PUMP_FAN1


Processor
Socket
CPU_PWR1 CPU_PWR2
JTBT1
JUSB1 JCOM1 JDASH1
JTPM1
JFP2
JCI1 JLPT1 JRGB1 JRAINBOW2 JBAT1
PCI_E3
PCI_E4
PCI_E5
JAUD1
M2_3
PCI_E2
PCI_E1
SYS_FAN4 SYS_FAN3
M2_1
SYS_FAN5
JFP1
M2_2
DIMMA2
DIMMB1 DIMMB2
JRAINBOW1
DIMMA1
Overview of Components
BAT1
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
Important
 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.
 Confirm that the CPU heatsink has formed a tight seal with the CPU before booting
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
documentation in the heatsink/ cooler package for more details about installation.
CPU Socket
Please install the CPU into the CPU socket as shown below.
1
23
4
5
6
7
8
9
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DIMM Slots
Please install the memory module into the DIMM slot as shown below.

Important
 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
Presence Detect (SPD). Go to BIOS and find the DRAM Frequency to set the memory
frequency if you want to operate the memory at the marked or at a higher frequency.
 It is recommended to use a more efficient memory cooling system for full DIMMs
installation or overclocking.
 The stability and compatibility of installed memory module depend on installed CPU
and devices when overclocking.
 Please refer to www.msi.com for more information on compatible memory.
M2_3: M.2 Slot (Key E)
Please install PCIe Wi-Fi module into M2_3 slot as shown below.
30º
30º
13
2
1
1
32
2
3
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BAT1
PCI_E1~5: PCIe Expansion Slots
PCI_E1: Up to PCIe 4.0 x16 (From CPU)
PCI_E2: PCIe 3.0 x1 (From B660 chipset)
PCI_E3: Up to PCIe 3.0 x4 (From B660 chipset)
PCI_E4: PCIe 3.0 x1 (From B660 chipset)
PCI_E5: PCIe 3.0 x1 (From B660 chipset)

Important
 If you install a large and heavy graphics card, you need to use a tool such as MSI
Graphics Card Bolster to support its weight to prevent deformation of the slot.
 For a single PCIe x16 expansion card installation with optimum performance, using
the PCI_E1 slot is recommended.
 When adding or removing expansion cards, always turn off the power supply and
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.
JFP1, JFP2: Front Panel Connectors
The JFP1 connector controls the power on, power reset, and the LEDs on your PC
case/chassis. Power Switch/ Reset Switch headers allow you to connect power button/
reset button. Power LED header connects to LED light on the PC case, and HDD LED
header indicates the activity of the hard disk. The JFP2 connector is for Buzzer and
Speaker. To connect the cables from PC case to the right pins, please refer to the
following images below.
1
2 10
9
Power LED
Reserved
Power Switch
JFP1
Reset SwitchHDD LED
1
JFP2
Buzzer
Speaker

Important
Please note that Power LED and HDD LED have positive and negative connection,
you need to link up the cable to the corresponding positive and negative port on the
motherboard. Otherwise, LEDs won’t work properly.
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M2_1~2: M.2 Slots (Key M)
Please install the M.2 solid-state drive (SSD) into the M.2 slot as shown below.
Installing M.2 module
For M2_1 slot
1. Loosen the screws of M.2 SHIELD FROZR heatsink.
2. Remove the M.2 SHIELD FROZR and remove the protective films from the thermal
pads.
2
1
1
3. Remove (for 22110 SSD) or move (for 2260/ 2242 SSD) the EZ M.2 Clip according to
your SSD length. Skip this step, if you install 2280 SSD.
4. Insert your M.2 SSD into the M.2 slot at a 30-degree angle.
5. Rotate the EZ M.2 Clip to fix the M.2 SSD. Skip this step, if you install 22110 SSD.
30º30º
3
3
4
5
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For M2_2 slot
1. Please install the supplied EZ M.2 Clip kit in the M.2 slot according to your SSD
length.
2. Insert your M.2 SSD into the M.2 slot at a 30-degree angle.
3. Rotate the EZ M.2 Clip to fix the M.2 SSD.
30º30º
1
3
2
6. Put the M.2 SHIELD FROZR heatsink back in place and secure it.
6
6
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SATA5~8: SATA 6Gb/s Connectors
These connectors are SATA 6Gb/s interface ports. Each connector can connect to one
SATA device.
SATA5
SATA7
SATA6
SATA8

Important
 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
recommended that the flat connector be connected to the motherboard for space
saving purposes.
 SATA7 will be unavailable when installing M.2 SATA SSD in the M2_2 slot.
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
Important
Make sure that all the power cables are securely connected to a proper ATX power
supply to ensure stable operation of the motherboard.
CPU_PWR1~2, ATX_PWR1: Power Connectors
These connectors allow you to connect an ATX power supply.
CPU_PWR1
Pin Signal Name Pin Signal Name
1 Ground 2 Ground
3 Ground 4 Ground
5 +12V 6 +12V
7 +12V 8 +12V
ATX_PWR1
Pin Signal Name Pin Signal Name
1 +3.3V 2 +3.3V
3 Ground 4 +5V
5 Ground 6 +5V
7 Ground 8 PWR OK
9 5VSB 10 +12V
11 +12V 12 +3.3V
13 +3.3V 14 -12V
15 Ground 16 PS-ON#
17 Ground 18 Ground
19 Ground 20 Res
21 +5V 22 +5V
23 +5V 24 Ground
5
4 1
8
CPU_PWR1
CPU_PWR2
24
131
12
ATX_PWR1
CPU_PWR2
Pin Signal Name Pin Signal Name
1 Ground 2 +12V
3 Ground 4 +12V
12 34
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JAUD1: Front Audio Connector
This connector allows you to connect audio jacks on the front panel.
1
2 10
9
Pin Signal Name Pin Signal Name
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
CPU_FAN1, PUMP_FAN1, SYS_FAN1~5: Fan Connectors
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.
1
1
PWM Mode pin definition
Pin Signal Name Pin Signal Name
1 Ground 2 +12V
3 Sense 4 Speed Control Signal
DC Mode pin definition
Pin Signal Name Pin Signal Name
1 Ground 2 Voltage Control
3 Sense 4 NC
Fan connector specifications
Connector Default fan mode Max. current Max. power
CPU_FAN1 PWM mode 2A 24W
PUMP_FAN1 PWM mode 3A 36W
SYS_FAN1~5 DC mode 1A 12W

Important
You can adjust fan speed in BIOS > HARDWARE MONITOR.
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