MSI B550-A Pro (AM4)

CPU

Supports AMD Ryzen™ 5000 & 3000 Series desktop processors (not compatible with AMD Ryzen™ 5 3400G & Ryzen™ 3 3200G) and AMD Ryzen™ 4000 G-Series desktop processors

See supported processors

CHIPSET

AMD B550 Chipset

MEMORY

• 4x DDR4 memory slots, support up to 128GB ¹
  
  
  
  
  • Supports DDR4 1866/ 2133/ 2400/ 2667/ 2800/ 2933/ 3000/ 3066/ 3200 MHz by JEDEC
  
  
  • Supports DDR4 2667/ 2800 /2933 /3000 /3066 /3200 /3466 /3600/ 3733 /3866 /4000 /4133 /4266 /4400+ MHz by A-XMP OC MODE
    
    
    
    • 1DPC 1R Max speed 4800 MHz
    
    
    • 1DPC 2R max speed 3866 MHZ
    
    
    • 2DPC 1R max speed 4000 MHZ
    
    
    • 2DPC 2R max speed 3600 MHZ
    
    
    
    
  
  
  
  


• Dual channel memory architecture


• Supports non-ECC UDIMM memory


• Supports ECC UDIMM memory (non-ECC mode)


• Supports un-buffered memory

1. Please refer www.msi.com for more information on compatible memory.

See supported memory

EXPANSION SLOT

• 1x PCIe 4.0/ 3.0 x16 slot (PCI_E1) ¹


• 1x PCIe 3.0 x16 slot (PCI_E3), supports x4 speed ²


• 2x PCIe 3.0 x1 slots

1. The supported specification depends on installed processor.


2. When installing PCIe SSD in M.2_2, PCI_E3 slot will be unavailable.

MULTI-GPU

• Supports 2-Way AMD CrossFire^™ Technology

ONBOARD GRAPHICS

• 1x HDMI™ 2.1 port, supports a maximum resolution of 4096x2160 @60Hz ^1 2
  
  Support HDCP 1.4 & 2.3


• 1x DisplayPort, supports a maximum resolution of 4096x2160 @60Hz ¹


• Maximum shared memory of 16 GB

1. Available for the processor with integrated graphics.


2. Graphics specifications may vary depending on the CPU installed.

STORAGE

AMD B550 Chipset

• 6x SATA 6Gb/s ports


• 2x M.2 slots (Key M)
  
  
  
  • M2_1 slot (from AMD Processor)
    
    
    
    • Supports PCIe 4.0/ 3.0 x4 ¹
    
    
    • Supports SATA 6Gb/s
    
    
    • Supports 2242/ 2260/ 2280/ 22110 storage devices
    
    
    
    
  
  
  • M2_2 slot (from AMD B550 chipset)
    
    
    
    • Supports PCIe 3.0x4
    
    
    • Supports 2242/ 2260/ 2280 storage devices
    
    
    
    
  
  
  
  

1. The supported specification depends on installed processor.

RAID

• Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices


• Supports RAID 0 and RAID 1 for M.2 NVMe storage devices

USB

AMD B550 Chipset

• 3x USB 3.2 Gen 1 5Gbps ports (1 Type-C internal connector, and 2 ports are available through the internal USB 3.2 Gen 1 5Gbps connector)


• 8x USB 2.0 ports (4 Type-A ports on the back panel, 4 ports through the internal USB 2.0 connectors)

AMD Processor

• 2x USB 3.2 Gen 2 10Gbps ports (1 Type-C port and 1 Type-A port on the back panel)


• 2x USB 3.2 Gen 1 5Gbps Type-A ports on the back panel

AUDIO

Realtek^® ALC892/ALC897 Codec

• 7.1-Channel High Definition Audio

LAN

• 1x Realtek^® 8111H Gigabit LAN controller