MSI B550-A PRO / B550 / AM4 / 4x DDR4 DIMM / 2x M.2 / HDMI / DP / USB Type-C / ATX

• 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

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

• 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
  The supported specification depends on installed processor.When installing PCIe SSD in M.2_2, PCI_E3 slot will be unavailable.

• Supports 2-Way AMD CrossFire™ Technology

• 1x HDMI™ 2.1 port, supports a maximum resolution of 4096x2160 @60Hz Support HDCP 1.4 & 2.3
• 1x DisplayPort, supports a maximum resolution of 4096x2160 @60Hz
• Maximum shared memory of 16 GB
  Available for the processor with integrated graphics.

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
• The supported specification depends on installed processor.

• Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices
• Supports RAID 0 and RAID 1 for M.2 NVMe storage devices

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

• Realtek ALC892 Codec
  7.1-Channel High Definition Audio

• 1x Realtek 8111H Gigabit LAN controller

• 1x 24-pin ATX main power connector
• 1x 8-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 connector (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
• 6x 4-pin system fan connectors
• 1x Front panel audio connector
• 2x System panel connectors
• 1x Chassis Intrusion connector
• 1x 4-pin RGB LED connector
• 2x 3-pin RAINBOW LED connectors
• 1xTPM module connector
• 1x Clear CMOS jumper

• Keyboard / Mouse
• DisplayPort
• LAN
• HD Audio Connectors
• Flash BIOS Button
• USB 2.0
• HDMI
• USB 2.0
• USB 3.2 Gen 1 5Gbps Type-A
• USB 3.2 Gen 2 10Gbps Type-A+C

• 9 mounting holes

• ATX Form Factor
• 12 in. x 9.6 in. (30.5 cm x 24.4 cm)