| Key Features | |
| Form Factor | Micro ATX |
| Connectivity | |
| HDMI | 1 x HDMI |
| Basic Information | |
| Supported 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 | Type DDR4 Slots 1x PCIe 3.0 x1 slot 1 1x PCIe 4.0/3.0 x16 slot The supported specification depends on the installed processor. Supported 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 Maximum Mamory 64GB |
| Memory | |
| Slots | PCI PCI-E X16 x 1 PCI-E (Gen4 / Gen3) M.2 Socket 1 x M.2 Socket |
| Network & Connectivity | |
| Lan | 1x Realtek RTL8111H Gigabit LAN |
| General information | |
| Graphics | Graphics 1x HDMI 2.1 port, supports a maximum resolution of 4096x2160 @60Hz 1x DVI-D port, supports a maximum resolution of 1920x1200@60Hz Available for the processor with integrated graphics. Graphics specifications may vary depending on the CPU installed. Max Shared Memory 16 GB |
| Main Features | |
| Audio | 7.1-Channel High Definition Audio |
| Connector & Ports | |
| Supported Storage | AMD B550 Chipset 4x SATA 6Gb/s ports 1x M.2 slot (Key M) (from AMD Processor) Supports PCIe 4.0/ 3.0 Supports SATA 6Gb/s Supports 2242/ 2260/ 2280 storage devices The supported specification depends on the 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 |
| Internal I/O Ports | 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 |
| Physical Specification | |
| 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 |
| Warranty Information | |
| Warranty | 03 Years |
The MSI B550M-A PRO AM4 Micro ATX Motherboard is designed for PC enthusiasts, gamers, and professionals looking for a reliable and high-performance motherboard. Built on the AMD B550 chipset, it supports AMD Ryzen 5000, 4000 G-Series, and 3000 series processors, providing a powerful foundation for gaming, content creation, and productivity tasks. However, it's important to note that this motherboard is not compatible with AMD Ryzen 5 3400G and Ryzen 3 3200G.
High-Speed Memory and Storage Options
The MSI B550M-A PRO comes with two DDR4 memory slots, supporting up to 64GB of RAM. It offers speeds of up to 4600+ MHz (A-XMP OC Mode), ensuring smooth multitasking and optimal gaming performance. The dual-channel memory architecture enhances memory bandwidth, providing better system responsiveness.For storage, the motherboard includes four SATA 6Gbps ports and one M.2 slot (PCIe 4.0/3.0 & SATA support). This allows users to install ultra-fast NVMe SSDs for quick boot times and high-speed data transfers. The board supports RAID 0, RAID 1, and RAID 10 for SATA devices and RAID 0 and RAID 1 for M.2 NVMe SSDs, ensuring reliable data storage solutions.
Graphics and Display Connectivity
This motherboard features one HDMI 2.1 port, supporting a maximum resolution of 4096x2160 @60Hz, and one DVI-D port, supporting 1920x1200 @60Hz. The availability of integrated graphics depends on the installed Ryzen processor with Radeon Graphics. With a maximum shared memory of 16GB, this board is a great option for budget gaming and office use.
Networking and Audio
The Realtek RTL8111H Gigabit LAN provides a stable and fast 1Gbps wired network connection, ensuring seamless online gaming, video streaming, and downloads. On the audio side, the motherboard features 7.1-Channel High Definition Audio, delivering immersive sound quality for gaming and entertainment setups.