- Model:B550M-A PRO
- AMD B550 chipset, Socket AM4, Micro-ATX
- DDR4 memory up to 64GB, PCIe 4.0 support
- 4x SATA, 1x M.2 slot, Lightning Gen 4
- HDMI 4K, DVI-D, Gigabit LAN, Audio Boost
- 3 Years Warranty from MSI
Overview
The MSI B550M-A PRO is a Micro-ATX motherboard built for AMD Ryzen 5000 and 3000 Series processors. It features the AMD B550 chipset with Socket AM4 compatibility and supports DDR4 memory up to 64GB with speeds up to 4600MHz (OC). The board includes PCIe 4.0 support with Lightning Gen 4 M.2 technology delivering up to 64GB/s transfer speeds.
Designed for professional workflows and gaming, the B550M-A PRO offers robust connectivity with 4x SATA 6Gb/s ports, 1x M.2 slot, and comprehensive USB support including 4x USB 3.2 Gen 1 rear ports. The onboard graphics support 4K resolution via HDMI 2.1 and DVI-D outputs. Premium features include 2oz thickened copper PCB for improved heat dissipation, Core Boost technology for enhanced CPU performance, and Audio Boost for studio-grade sound quality.
The motherboard comes with comprehensive cooling controls, RAID support (0/1/10), and Realtek ALC892/ALC897 audio codec. Its user-friendly design includes multiple fan connectors and extensive BIOS/software tuning options through MSI's Dragon Center software.
- AMD B550 Chipset with Socket AM4 support
- Supports AMD Ryzen 5000 & 3000 Series processors
- DDR4 memory up to 64GB, speeds up to 4600MHz (OC)
- PCIe 4.0 x16 slot with Lightning Gen 4 M.2
- 4x SATA 6Gb/s ports with RAID support
- HDMI 2.1 (4K UHD) and DVI-D video outputs
- 4x USB 3.2 Gen 1 rear ports + 2x USB 3.2 Gen 1 front
- 2oz Thickened Copper PCB design
- Core Boost technology for CPU performance
- Audio Boost with Realtek ALC892/ALC897 codec
- Gigabit LAN (Realtek RTL8111H)
- Micro-ATX form factor (23.6cm x 20cm)
Specifications
- Chipset
- AMD® B550 Chipset
- 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
- Memory
- 2x DDR4 memory slots, support up to 64GB 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.
- Onboard Graphics
- 1x HDMI™ 2.1 port, supports a maximum resolution of 4096x2160 @60Hz Support HDCP 1.4 & 2.3 1x DVI-D port, supports a maximum resolution of 1920x1200@60Hz Maximum shared memory of 16 GB Available for the processor with integrated graphics. Graphics specifications may vary depending on the CPU installed.
- Slot
- 1x PCIe 4.0/3.0 x16 slot 1x PCIe 3.0 x1 slot The supported specification depends on installed processor.
- Audio
- Realtek® ALC892/ALC897 Codec 7.1-Channel High Definition Audio
- Storage
- 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 installed processor.
- RAID
- Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices
- USB
- 4x USB 3.2 Gen 1 5Gbps Type-A ports on the back panel 2x USB 3.2 Gen 1 5Gbps ports are available through the internal USB 3.2 Gen 1 5Gbps connector 2 Type-A ports on the back panel 4 ports through the internal USB 2.0 connectors
- LAN
- 1x Realtek® RTL8111H Gigabit LAN controller
- Internal IO
- 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
- 1. LAN port 2. HDMI™ 3. DVI-D 4. Keyboard / Mouse 5. USB 3.2 Gen 1 5Gbps Type-A 6. USB 3.2 Gen 1 5Gbps Type-A 7. USB 2.0 Ports 8. Audio Connectors
- Dimensions
- Micro-ATX Form Factor 9.3 in. x 7.9 in. (23.6 cm x 20 cm)
- MOUNTING
- 8 mounting holes
Warranty
3 Years manufacturer warranty from MSI. Warranty service is provided by the brand's authorised service centre under the brand's own terms; keep the original invoice and the serial number for any claim, and we will guide you through the process. Details are in our Warranty Policy.