The ASUS Prime B550M-A CSM is a microATX motherboard built for AMD AM4 desktop systems. It supports AMD Ryzen 5000, 4000 G, and 3000 series processors, DDR4 memory up to 128 GB, and modern storage with dual M.2 slots plus four SATA 6 Gbps ports. Rear connectivity includes HDMI, D-Sub, DVI-D, USB 3.2, Gigabit Ethernet, and audio outputs, making it a practical foundation for a flexible AMD-based PC build.
Compatibility
AMD AM4 desktop processors
AMD Ryzen 5000 Series
AMD Ryzen 4000 G-Series
AMD Ryzen 3000 Series
microATX PC builds
Frequently asked questions
Which processors does it support?
It is designed for AMD Ryzen desktop processors in the 5000, 4000 G, and 3000 series on the AM4 socket.
Which rear ports are available?
The rear panel includes HDMI, D-Sub, DVI-D, USB 3.2 ports, Gigabit Ethernet, and audio jacks.
How much memory can it take?
It supports DDR4 memory across four DIMM slots, with a maximum capacity of 128 GB.