MotherboardsMSI
MSI AMD B550 B550-A PRO PCIe 4 DDR4 ATX Motherboard
MPN: B550-A PRO
Key specifications
SocketAM4
Form factorATX
ChipsetAMD B550
Memory typeDDR4
M.2 slots2
Max Memory128 GB
Full Specifications31 fields
Additional Information
Model Number
B550-A PRO
Gtin
4719072733667
Additional Specifications
Water Cooled
No
Cooling
Passive Heatsinks
Qpi Speed
N/A
Dimensions
305 x 244 mm
Note
-
Core Specifications
Edition
B550-A PRO
Form Factor
ATX
Socket
AM4
Chipset
AMD B550
External Connectivity
Network Interface Type
Wired Gigabit LAN (10/100/1000)
Network Chip Modules
1 x Realtek RTL8111H (Gigabit LAN)
Rear I O Connectors
1 x 10/100/1000 (LAN)
1 x Center/Subwoofer Speaker Out
1 x DisplayPort
1 x HDMI
1 x Line In
1 x Line Out
1 x Mic-In
1 x PS/2 Keyboard/
Mouse Combo
1 x Rear Speaker Out
4 x USB 2.0
2 x USB 3.2 Gen1 Type-A
1 x USB 3.2 Gen1 Type-C
1 x USB 3.2 Gen2 Type-A
Graphics Support
Primary Gpu Interface
PCIe 4.0 (x16)
Nvidia Sli Support
Not Supported
Amd Crossfire Support
2-Way CrossFire
Integrated Graphics
Requires Processor Graphics or Discrete GPU
On Board Graphics Connectors
DisplayPort
HDMI
Internal Connectivity
Expansion Slots
1 x M.2, 22-42/60/80, PCIe Gen3x4
1 x M.2, 22-42/60/80/
110, PCIe Gen4x4/SATA
2 x PCIe 3.0 x1
1 x PCIe 3.0 x16
1 x PCIe 4.0 x16
Sata Support
SATA3
Raid Support Via
SATA3 / M.2
Storage Mode Support
RAID 0
RAID 1
RAID 10
Internal I O
1 x 24-pin (Power)
2 x 3-pin RAINBOW LED connector
6 x 4-pin CHA_FAN connector
1 x 4-pin CPU Fan Connector
1 x 4-pin RGB LED connector
1 x 4-pin Water Pump Connector
1 x 8-pin (Power)
1 x Chassis Intrusion connector
1 x Clear CMOS jumper
1 x Front Panel Audio Header
6 x SATA III - 6Gb/s
2 x System panel connector
1 x TPM Header
2 x USB 2.0 Header
1 x USB 3.2 Gen1 Header
1 x USB 3.2 Gen1 Type-C Front Panel Header
RAM Memory Support
Memory Type
DDR4
Memory Channel
Dual (2)
Memory Type Ecc
ECC/Non-ECC
Memory Type R U
UDIMM (Unbuffered)
Memory Speed Mhz
DDR4 - 1866
DDR4 - 2133
DDR4 - 2400
DDR4 - 2667
DDR4 - 2800(OC)
DDR4 - 2933(OC)
DDR4 - 3000(OC)
DDR4 - 3066(OC)
DDR4 - 3200
DDR4 - 3200(OC)
DDR4 - 3466(OC)
DDR4 - 3600(OC)
DDR4 - 3733(OC)
DDR4 - 3866(OC)
DDR4 - 4000(OC)
DDR4 - 4133(OC)
DDR4 - 4266(OC)
DDR4 - 4400+(OC)
Max Memory Capacity
128GB
General
Audio
Realtek ALC892 7.1 HD Audio
Best indexed price
£94.99GBP
Indexed 25 May 2026 — verify at retailer
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