Build a compact, high-performance AM5 system with this micro-ATX motherboard based on the AMD B850 chipset. It supports Ryzen processors and up to 256GB DDR5 across four DIMM slots, including overclocked speeds up to 8000 MT/s and ECC support. Storage is next-gen ready with one PCIe 5.0 x4 M.2 slot plus two PCIe 4.0 x4 M.2 slots, alongside four SATA 6G ports for extra drives. Expansion includes a PCIe 5.0 x16 slot for your GPU and a PCIe 4.0 x4 slot. Stay connected with 2.5Gb Dragon RTL8125BG LAN, Wi-Fi 6E, and Bluetooth 5.2. Cooling is covered with VRM and M.2 heatsinks plus a backplate, and you get 5 fan headers. Rear I/O includes USB-C, multiple USB-A, HDMI, and DisplayPort. RGB and ARGB headers let you customize lighting to match your build.
ASROCK B850M Pro A WiFi (AM5) (D)
| Color | |
| Main color | Black |
| Form factor | |
| Mainboard form factor | Micro-ATX |
| CPU | |
| CPU manufacturer | AMD |
| CPU socket | AM5 |
| Mainboard | |
| Motherboard chipset | AMD B850 |
| RAM | |
| max. RAM | 256 GB |
| Storage type | DDR5 |
| Storage design | DIMM |
| Maximum memory speed (OC) | 8000 MT/s |
| ECC Support | Yes |
| Memory slots | 4x |
| Performance profile | Intel XMP |
| Wi-Fi & LAN | |
| LAN | Yes |
| LAN ports | 1x 2.5 Gbit/s |
| LAN chip |
Dragon RTL8125BG |
| Wi-Fi / Bluetooth | Yes |
| WLAN standard | Wi-Fi 6E |
| Bluetooth standard | 5.2 |
| cooling | |
| Backplate | Yes |
| M.2 cooler | Yes |
| VRM heatsink | Yes |
|
Internal connections |
|
| CPU power supply |
1x 4-pin + 1x 8-pin |
| USB 3.0 / 3.1 / 3.2 (internal) Type-C header | 1 |
| USB 3.0 / 3.1 / 3.2 (internal) Type C possible connections | 1 |
| USB 3.0 (internal) header | 2 |
| USB 3.0 (internal) possible connections | 4 |
| USB 2.0 (internal) header | 2 |
| USB 2.0 (internal) possible connections | 4 |
| RGB / LED connections |
1x RGB (4-Pin 5050 12VGRB), 3x Digital RGB (3-Pin 5VDG) |
| Front panel audio header | Yes |
| SPI-TPM header | Yes |
| External ports | |
| USB 3.1 (external) Type C | 1 |
| USB 3.1 (external) Type A | 1 |
| USB 3.0 (external) Type A | 2 |
| USB 2.0 (external) Type A | 4 |
| Display connections |
DisplayPort (1x), HDMI (1x) |
|
Storage connections |
|
| M.2 PCIe 4.0 x4 | 2 |
| M.2 PCIe 5.0 x4 | 1 |
| SATA 6G (internal) | 4 |
| Back Connect | |
| Back Connect | No |
| Expansion slots | |
| PCIe x16 slots (total) | 1 |
| PCIe x4 slots (total) | 1 |
| PCIe 5.0 x16 (mechanical) | 1 |
| PCIe 4.0 x4 (mechanical) | 1 |
| Fan header | |
| 4-pin fan connectors | 5 |
| Audio | |
| Sound chip | Realtek ALC897 |
| lighting | |
| Lighting / RGB | Yes |
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