MSI B550M A PRO MOTHERBOARD

MSI B550M-A PRO Motherboard Specifications

​The MSI B550M-A PRO is a professional-grade Micro-ATX motherboard designed for reliability and essential performance. Built on the AMD B550 chipset, it supports modern Ryzen processors and introduces high-speed PCIe 4.0 technology for both graphics and storage in a compact, budget-friendly form factor.

​Core Specifications

• ​Socket: AMD Socket AM4
• ​Chipset: AMD B550
• ​Form Factor: Micro-ATX (23.6 cm x 20 cm)
• ​CPU Support: Supports AMD Ryzen™ 5000 & 3000 Series (not compatible with Ryzen™ 5 3400G & Ryzen™ 3 3200G) and Ryzen™ 4000 G-Series.

​Memory Support

• ​Slots: 2 x DDR4 DIMM Slots
• ​Max Capacity: Up to 64GB
• ​Speeds: Supports up to 4600+ MHz (OC) via A-XMP
• ​Architecture: Dual Channel

​Expansion & Storage

• ​PCIe Slots:
  • ​1 x PCIe 4.0/3.0 x16 slot (Primary)
  • ​1 x PCIe 3.0 x1 slot
• ​M.2 Slots: 1 x M.2 slot (Key M) supporting PCIe 4.0/3.0 x4 and SATA 6Gb/s.
• ​SATA Ports: 4 x SATA 6Gb/s ports (supports RAID 0, 1, 10).

​Rear I/O Ports

• ​1 x HDMI 2.1 (Supports 4K @60Hz)
• ​1 x DVI-D
• ​4 x USB 3.2 Gen 1 5Gbps (Type-A)
• ​2 x USB 2.0 (Type-A)
• ​1 x Realtek® RTL8111H Gigabit LAN port
• ​3 x Audio Jacks (Realtek® ALC892/ALC897 Codec)
• ​1 x PS/2 Keyboard/Mouse combo port

​Internal Connectors

• ​1 x USB 3.2 Gen 1 5Gbps header (supports 2 additional ports)
• ​2 x USB 2.0 headers (supports 4 additional ports)
• ​1 x 4-pin CPU fan connector
• ​1 x 4-pin System fan connector
• ​1 x TPMS module header

​Key Highlights

• ​Lightning Gen 4: Harness the power of PCIe 4.0 for faster SSD speeds and optimized GPU performance.
• ​Core Boost: Premium power layout and digital power design to support high-core CPUs with stable current delivery.
• ​DDR4 Boost: Fully isolated memory circuitry to ensure pure data signals for the best gaming and overclocking stability.
• ​Audio Boost: Dedicated audio processor and high-quality capacitors for studio-grade sound quality.
• ​2oz Thickened Copper PCB: Improved heat dissipation and structural reliability for long-term use.