MSI B550M-A PRO AM4 DDR4 Micro-ATX Motherboard

MSI B550M-A PRO AM4 DDR4 Micro-ATX Motherboard

The MSI B550M-A PRO is a Micro-ATX motherboard on the AMD B550 chipset for the AM4 socket, bringing PCIe 4.0 to a compact DDR4 build. It supports AMD Ryzen 5000 and 3000 Series desktop processors, excluding Ryzen 5 3400G and Ryzen 3 3200G, along with AMD Ryzen 4000 G-Series processors, and suits gamers and professionals who want modern storage speed in a smaller case.

Key Specifications

• Socket AM4 with AMD B550 chipset in a Micro-ATX form factor
• 2 DDR4 memory slots supporting up to 64GB, with DDR4 speeds up to 4600 MHz by A-XMP OC mode
• 1 PCIe 4.0 and 3.0 x16 slot and 1 PCIe 3.0 x1 slot
• 1 M.2 Gen4 x4 slot plus 4 SATA 6Gb/s ports, with RAID 0, RAID 1 and RAID 10 support
• Realtek RTL8111H Gigabit LAN and Realtek ALC892 and ALC897 codec with 7.1-channel high definition audio
• HDMI and DVI-D display outputs, requiring a processor with integrated graphics
• Rear USB: 4 USB 3.2 Gen 1 5Gbps Type-A ports and 2 USB 2.0 ports; front headers add 2 USB 3.2 Gen 1 ports and 4 USB 2.0 ports

Lightning Gen4 Solution

The Lightning Gen4 solution pairs the latest Gen4 PCI-E slot with a Gen4 x4 M.2 slot offering up to 64GB/s of bandwidth for maximum transfer speed, so both the graphics card and the primary SSD run on the fastest interface this chipset generation offers. PCI-E Steel Armor protects the graphics card slot against bending and electromagnetic interference, while Core Boost, DDR4 Boost and a 2oz thickened copper PCB support stable performance under load.

1. Pair a Ryzen 5000 Series processor with a PCIe 4.0 graphics card for a compact gaming build.
2. Fit a Gen4 NVMe SSD as the primary drive and add SATA storage as needed.
3. Populate the two DDR4 slots with up to 64GB of dual-channel memory.