MSI B550-A Pro ATX Motherboard PCIE 4GEN


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Model B550-A PRO

Manufacturer Part#  B550APRO

UPC Code: 824142219362

Provantage Code:  MSTB10U

Condition:  Factory New

  • Product Type: Desktop Motherboard
  • Form Factor: ATX
  • Memory Technology: DDR4 SDRAM
  • Total Number of USB Ports: 8
  • Maximum Memory Supported: 128 GB
  • TAA Compliant: No

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MSI B550APRO Specifications

    B550-A Pro ATX Motherboard PCIE 4GEN



    PRO series helps users work smarter by delivering an efficient and productive experience. Featuring stable functionality and high-quality assembly, PRO series motherboards provide not only optimized professional workflows but also less troubleshooting and longevity.

Additional Product Images


Product NameB550-A Pro ATX Motherboard PCIE 4GEN
Manufacturer Part NumberB550APRO
Product TypeDesktop Motherboard
Chipset ManufacturerAMD
Chipset ModelB550
Number of Memory Slots4
Multi GPU SupportedCrossFire
Gigabit EthernetYes
Number of SATA Interfaces6
Number of PCI Express x1 Slots2
Onboard VideoCPU Dependent Video
RAID SupportedYes
Number of Total Expansion Slots4
Number of PCI Express x16 Slots2
Total Number of USB Ports8
Total Number of Onboard USB Ports7
Total Number of PCI Express Slots4
Memory Form FactorDIMM


Number of M.2 Interfaces2
Number of USB 3.2 Ports4
Number of Onboard USB 3.2 Ports3
Memory TechnologyDDR4 SDRAM
Processor SocketSocket AM4
Form FactorATX
Processor SupportedRyzen 3

Ryzen 5

Ryzen 7

Ryzen 9

Total Processor Supported1
Controller TypeSerial ATA/600
Maximum Memory Supported128 GB
Audio Channels7.1
Number of Network (RJ-45) Ports1
Number of USB 2.0 Ports4
Number of Onboard USB 2.0 Ports4
Memory Speed Supported1866 MHz

2133 MHz

2400 MHz

2667 MHz

2800 MHz

2933 MHz

3000 MHz

3066 MHz

3200 MHz

3466 MHz

3600 MHz

3733 MHz

3866 MHz

4000 MHz

4133 MHz

4266 MHz

4400 MHz

Country of OriginChina
Product SeriesPRO
Product ModelB550-A PRO
RAID Levels0



Limited Warranty3 Year
WARNING: This product contains a chemical known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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MSI Model B550-A PRO B550APRO