ASUS Prime B550M-A WiFi II AMD AM4 (3rd Gen Ryzen) Micro ATX Motherboard (PCIe 4.0, WiFi 6, ECC Memory, 1Gb LAN, HDMI 2.1/D-Sub, 4K@60HZ, Addressable Gen 2 RGB Header and Aura Sync)

The ASUS Prime B550M-A WiFi II is a versatile Micro ATX motherboard built for AMD AM4 socket Ryzen 5000, 4000 G-Series, and 3000 Series processors (with BIOS update), delivering a solid 8+2 DrMOS power stage design with enlarged VRM heatsinks for stable performance and light overclocking.

It supports dual-channel DDR4 memory up to 128 GB across four DIMM slots at speeds reaching 4866 MHz (OC) via ASUS OptiMem II, with official ECC memory compatibility for workstation use. Expansion includes one PCIe 4.0 x16 slot with SafeSlot Core reinforcement, one PCIe 3.0 x16 (x4 mode), one PCIe 3.0 x1 slot, one M.2 PCIe 4.0 x4 slot with heatsink, and four SATA 6Gb/s ports with RAID 0/1/10 support.



Connectivity is comprehensive with integrated Intel Wi-Fi 6 (802.11ax), Bluetooth 5.2, Realtek 1 GbE LAN, HDMI 2.1 and D-Sub outputs supporting 4K@60Hz, rear USB 3.2 Gen 2 Type-C, front-panel USB 3.2 Gen 1 Type-C header, one addressable Gen 2 RGB header, and Aura Sync support. Additional features such as a pre-mounted I/O shield, BIOS FlashBack button, and 5X Protection III safeguards make the Prime B550M-A WiFi II an excellent, feature-packed choice for compact, wireless-enabled Ryzen gaming and productivity systems.