MSI B550M-A PRO AM4 mATX Motherboard

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

Chipset

AMD B550 Chipset

Memory

2x DDR4 memory slots, support up to 64GB 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/ 4600+ MHz by A-XMP OC MODE

1DPC 1R max speed 4600 MHz

1DPC 2R max speed 3866 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.

Expansion Slot

1x PCIe 3.0 x1 slot 1

1x PCIe 4.0/3.0 x16 slot

The supported specification depends on installed processor.

Onboard Graphics

1x HDMI™ 2.1 port, supports a maximum resolution of 4096x2160 @60Hz12

Support HDCP 1.4 & 2.3

1x DVI-D port, supports a maximum resolution of 1920x1200@60Hz1

Maximum shared memory of 16 GB

Available for the processor with integrated graphics. Graphics specifications may vary depending on the CPU installed.

Storage

AMD B550 Chipset

4x SATA 6Gb/s ports

1x M.2 slot (Key M) (from AMD Processor)

Supports PCIe 4.0/ 3.0 1

Supports SATA 6Gb/s

Supports 2242/ 2260/ 2280 storage devices

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

2x USB 3.2 Gen 1 5Gbps ports are available through the internal USB 3.2 Gen 1 5Gbps connector

6x USB 2.0 ports (2 Type-A ports on the back panel, 4 ports through the internal USB 2.0 connectors)

AMD Processor

4x 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® RTL8111H Gigabit LAN controller

Internal connectors

1x 24-pin ATX main power connector

1x 4-pin ATX 12V power connector

4x SATA 6Gb/s connectors

1x M.2 slots (M-Key)

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 system fan connectors

1x Front panel audio connector

2x System panel connectors

1x Chassis Intrusion connector

1xTPM module connector

1x Clear CMOS jumper

Back panel ports

LAN port

HDMI™

DVI-D

Keyboard / Mouse

USB 3.2 Gen 1 5Gbps Type-A

USB 3.2 Gen 1 5Gbps Type-A

USB 2.0 Ports

Audio Connectors

Dimensions

Micro-ATX Form Factor

9.3 in. x 7.9 in. (23.6 cm x 20 cm)

Mounting

8 mounting holes

Box content

B550M-A PRO Motherboard

2 x SATA Cables

I/O Shielding

Driver DVD

MSI Case Badge

Product Registration Card

Quick Installation Guide