Build a powerful AMD Ryzen system in a compact form factor with the PRIME B550M-A WIFI II Micro-ATX DDR4 Motherboard from ASUS. Powered by the AMD B550 chipset, this motherboard supports Ryzen 5000, 4000, and 3000 series processors with the AM4 socket. Designed for power, this micro-ATX motherboard utilizes the PCIe 4.0 data bandwidth to deliver high performance for intensive tasks such as gaming, video editing, and more. Use up to 128GB of dual-channel DDR4 memory, reaching 4866 MHz when overclocked, thanks to four memory slots. Storage wise, this motherboard supports two M.2 slots and four SATA III ports, which can be configured into RAID 0, 10, or 10 configurations. The PCIe 4.0 x16 slot can accommodate a high-end graphics card, while the additional PCIe 3.0 x16 and PCIe 3.0 x1 slots are available for compatible expansion cards.
| Chipset | AMD B550 |
| CPU Socket | AM4 |
| USB | 2x USB-A (USB 3.1/3.2 Gen 2) 4x USB-A (USB 3.0 / 3.1/3.2 Gen 1) |
| Thunderbolt | No |
| Display | 1x DVI-D 1x HDMI 1x VGA |
| Audio | 3x 1/8" / 3.5 mm |
| Ethernet / Controller | 1x Gigabit |
| PS/2 | 1x Combo |
| Buttons | BIOS Flashback, Clear CMOS |
| Memory Slots | 4x 288-Pin |
| Memory Support | DDR4 2133, 2400, 2666, 2933, 3000, 3200, 3333, 3400, 3466, 3600, 3733, 3866, 4000, 4133, 4200, 4266, 4333, 4400, 4466, 4600, 4800, 4866 MT/s |
| Maximum Capacity | 128 GB |
| Channel Architecture | Dual Channel |
| SATA | 4x SATA III |
| Storage Slots | 2x M.2 (M Key) 2242, 2260, 2280, 22110 (PCIe 4.0 x4) |
| Optane Memory Support | No |
| RAID Support | RAID 0, 1, 10 |
| Expansion Slots | 1x PCIe 4.0 x16 1x PCIe 3.0 x16 2x PCIe 3.0 x1 |
| USB | 1x USB 3.0 / 3.1/3.2 Gen 1 Header (Supports 2 USB-A Port) 2x USB 2.0 Header (Supports 4 USB-A Port) |
| Air Cooling | 2x 4-Pin CPU |
| Power Connectors | 1x 24-Pin Mainboard 1x 8-Pin ATX |
| Security | TPM Header |
| LED Header | 2x RGB |
| Audio | 1x S/PDIF 1x Speaker |
| Diagnostics | Clear CMOS, Flash BIOS |
| ROM | 256 Mb |
| Front Panel I/O | AAFP, USB 3.0 / 3.1/3.2 Gen 1 |
| Audio Codec | Realtek (7.1-Channel) |
| Wi-Fi | Wi-Fi 6 (802.11ax) with MU-MIMO Support |
| Bluetooth | 5.2 |
| OS Compatibility | Windows 10 to 11 (64-Bit Only) |
| Form Factor | Micro-ATX |
| Dimensions | 9.6 x 9.6" / 24.4 x 24.4 cm |