MSI B550M-A PRO AM4 Micro ATX AMD Motherboard

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Brand: MSI
Model: B550M-A PRO

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Key Features

- Supports AMD Ryzen 5000 & 3000 Series desktop processors
- Supports DDR4 4600(OC)MHz
- PCIe 4.0, Lightning Gen4 x4 M.2
- 2oz Thickened Copper PCB

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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
Audio	Realtek ALC892/ALC897 Codec
Expansion Slots
PCI	PCI-E X16 x 1 PCI-E (Gen4 / Gen3)
M.2 Socket	1 x M.2 Socket
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
Memory
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
Type	DDR4
Maximum Memory	64GB
Connector & Ports
HDMI	1 x HDMI
USB (s)	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
LAN Port (s)	1x Realtek RTL8111H Gigabit LAN
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
Audio	7.1-Channel High Definition Audio
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)V 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 1x Clear CMOS jumper
TPM (Trusted Platform Module )	1 x TPM module connector
Warranty Information
Warranty	3 Years Warranty

MSI B550M-A PRO AM4 Micro ATX AMD Motherboard

The MSI B550M-A PRO AM4 Micro-ATX Motherboard is a versatile and high-performance solution for gamers, PC builders, and professionals seeking stability, reliability, and future-ready features in a compact design. Built on the AMD B550 chipset, this motherboard supports AMD Ryzen 5000 Series, 3000 Series, and 4000 G-Series desktop processors, offering wide compatibility with modern AM4 CPUs. Note that it is not compatible with AMD Ryzen 5 3400G and Ryzen 3 3200G. Designed in a Micro-ATX form factor (9.6 x 9.6 inches), the B550M-A PRO efficiently balances compactness with expandability. It includes 1x PCIe 4.0/3.0 x16 slot for high-performance graphics cards and 1x PCIe 3.0 x1 slot for additional expansion cards. Storage options are robust, with 1x M.2 slot supporting PCIe 4.0/3.0 NVMe SSDs and 4x SATA 6Gb/s ports for traditional drives. It also supports RAID 0, RAID 1, and RAID 10 configurations for SATA devices, and RAID 0/1 for M.2 NVMe devices, providing flexible storage options. Memory support is strong, featuring 2x DDR4 DIMM slots with a maximum capacity of 64GB. With A-XMP overclocking, memory speeds can reach 4600+ MHz, ensuring smooth multitasking and high system responsiveness. Integrated graphics support is available via 1x HDMI 2.1 (4K @60Hz) and 1x DVI-D (1920x1200 @60Hz), depending on the CPU installed. Connectivity includes multiple USB 3.2 Gen 1 and USB 2.0 ports, Gigabit LAN powered by Realtek RTL8111H, and 7.1-channel HD audio with Realtek ALC892/ALC897 codec. Additional features include a TPM module connector, fan headers, and a Clear CMOS jumper for easy system maintenance. Backed by a 3-year manufacturing warranty, the MSI B550M-A PRO AM4 Micro-ATX motherboard delivers reliable performance, high-speed storage, flexible memory support, and future-proof connectivity, making it an ideal choice for compact gaming PCs, professional builds, and productivity systems. This motherboard combines compact design, robust features, and AMD’s latest platform technology for a balanced, high-performance AM4 solution.

Features Of MSI B550M-A PRO AM4 Micro ATX AMD Motherboard

Supports AMD Ryzen 5000 & 3000 Series Desktop Processors: Compatible with a wide range of AM4 CPUs, including Ryzen 5000, 3000, and 4000 G-Series desktop processors, delivering high performance for gaming, productivity, and professional applications.
Dual DDR4 Memory Support up to 64GB: Equipped with 2x DDR4 DIMM slots supporting speeds up to 4600+ MHz via A-XMP overclocking for smooth multitasking, faster load times, and responsive performance.
High-Speed Storage Options with PCIe 4.0 M.2 Slot: Features 1x M.2 slot for NVMe SSDs and 4x SATA 6Gb/s ports, supporting RAID 0, 1, and 10 configurations for enhanced storage performance and redundancy.
Advanced Graphics Output: Offers 1x HDMI 2.1 (4K @60Hz) and 1x DVI-D port for high-resolution displays, compatible with CPUs featuring integrated graphics.
Robust Expansion Slots: Includes 1x PCIe 4.0/3.0 x16 slot for high-performance graphics cards and 1x PCIe 3.0 x1 slot for additional expansion devices.
Reliable Networking and Audio: Comes with Gigabit LAN powered by Realtek RTL8111H and 7.1-channel HD audio with Realtek ALC892/ALC897 codec for immersive sound and stable connectivity.
Durable Design with 2oz Thickened Copper PCB: Ensures efficient heat dissipation, stable power delivery, TPM module support, multiple fan headers, and system reliability for long-lasting performance.