ASUS PRIME B550M-K ARGB AMD B550 Ryzen AM4 mATX motherboard M.2 slot PCIe 4.0 Realtek 1G wired LAN

AM4 socket for Ryzen 3000 4000 5000 series

This micro-ATX motherboard fits the AMD AM4 socket and supports Ryzen 3000 4000 and 5000 series desktop processors. It delivers PCIe 4.0 connectivity for graphics and storage, dual M.2 slots, Realtek 1G wired LAN and USB 3.2 Gen 1 ports front and rear. A PCH heatsink and Fan Xpert 2 plus hybrid fan headers handle thermals while addressable second-generation RGB headers work with Aura Sync.

Builders wanting PCIe 4.0 on a compact board

The board suits builders who want PCIe 4.0 graphics and storage bandwidth in a micro-ATX form factor and who need addressable RGB headers for lighting sync. It is not for systems that require more than two M.2 slots or more than one gigabit Ethernet port. It also does not suit builds needing built-in Wi-Fi or Bluetooth.

PCIe 4.0 and dual M.2 on micro-ATX

The deciding specification is the combination of PCIe 4.0 support and two M.2 slots on a micro-ATX layout. This determines whether the board can feed a modern GPU and two high-speed drives in a small case.