| General |
| Brand |
ASRock |
| Series |
Pro |
| Model |
B850 Pro-A WiFi |
| Part Number |
90-MXBQN0-A0UAYZ |
| Form Factor |
ATX, 8-layer PCB |
| Chipset |
AMD B850 |
| Socket |
AMD AM5 |
| Supported CPUs |
AMD Ryzen 9000, 8000 and 7000 Series Processors |
| Colour |
Black |
| Operating System |
Windows 10 64-bit / Windows 11 64-bit |
| Memory |
| DIMM Slots |
4x DDR5, dual channel |
| Max Capacity |
256GB |
| Speeds |
Up to 8000+ MT/s (OC) |
| Memory Type |
DDR5 ECC/non-ECC, un-buffered |
| Profiles |
AMD EXPO, XMP |
| Expansion Slots |
| PCIe x16 (CPU) |
1x PCIe 5.0 x16 (PCIE1), x16 mode |
| PCIe x16 (Chipset) |
1x PCIe 4.0 x16 (PCIE2), x4 mode |
| M.2 Key E |
1x M.2 Key E 2230 for the Wi-Fi/BT module |
| Storage |
| M2_1 (CPU) |
Blazing M.2, PCIe Gen5 x4 (128 Gb/s), 2280 |
| M2_2 (CPU) |
Hyper M.2, PCIe Gen4 x4 (64 Gb/s), 2280 |
| M2_3 (Chipset) |
Hyper M.2, PCIe Gen4 x4 (64 Gb/s), 2230/2242/2260/2280 |
| M2_4 (Chipset) |
Ultra M.2, PCIe Gen3 x4 (32 Gb/s), 2280 |
| SATA |
4x SATA3 6.0 Gb/s |
| RAID |
RAID 0/1 for SATA; RAID 0/1/10 for M.2 NVMe |
| Networking |
| LAN |
2.5 Gigabit LAN (Realtek Dragon RTL8125BG) |
| Wi-Fi |
Wi-Fi 6E (802.11ax), 2x2, 2.4/5/6GHz |
| Bluetooth |
Bluetooth 5.2 |
| Audio |
| Codec |
7.1 CH HD Audio, Realtek ALC897 |
| Rear Jacks |
Line in / Front speaker / Microphone |
| Rear I/O |
| USB-C |
1x USB 3.2 Gen2 Type-C (10 Gb/s), 1x USB 3.2 Gen1 Type-C (DP Alt Mode, DP 1.4a, up to 4K 60Hz) |
| USB 3.2 Gen1 |
4x Type-A |
| USB 2.0 |
6x Type-A |
| Video |
1x HDMI 2.1 (TMDS/FRL 8G, HDR, HDCP 2.3, up to 4K 120Hz) |
| Network |
1x RJ-45 2.5Gb LAN, 2x Wi-Fi antenna ports |
| Audio |
3x HD audio jacks |
| Buttons |
BIOS Flashback button |
| Internal Connectors |
| Fan Headers |
2x CPU Fan (4-pin), 4x Chassis Fan (4-pin), 1x AIO Pump (4-pin) |
| RGB |
1x RGB LED header (12V), 3x Addressable LED headers (5V) |
| USB Headers |
1x Front Type-C USB 3.2 Gen2x2 header (20 Gb/s), 1x USB 3.2 Gen1 header (2 ports), 2x USB 2.0 headers (3 ports) |
| Other |
SPI TPM header, power LED and speaker header, front panel audio connector |
| Power |
| VRM |
14+2+1 phase power design, 80A Dr.MOS (VCore + SOC + MISC) |
| Main Power |
1x 24-pin ATX |
| CPU Power |
2x 8-pin 12V (Hi-Density) |
| BIOS & Features |
| BIOS |
256Mb AMI UEFI Legal BIOS with GUI support |
| BIOS Features |
BIOS Flashback |
| Dimensions |
| Size |
30.5 x 24.4 cm (12.0 x 9.6 inch) |
