| General |
| Brand |
ASUS |
| Model |
PRIME B840M-A WIFI |
| Part Number |
90MB1J20-M0EAY0 |
| Series |
PRIME |
| Form Factor |
Micro-ATX, 24.4 x 24.4 cm (9.6 x 9.6 in) |
| Power Design |
8+2+1 phase digital power (discrete MOSFETs), 6-layer PCB |
| Performance |
| Socket |
AMD AM5 |
| Chipset |
AMD B840 |
| Supported CPUs |
AMD Ryzen 9000, 8000 and 7000 Series desktop processors |
| CPU Power Support |
Up to 170W |
| Memory |
| Memory Slots |
4 x DIMM, dual channel |
| Max Memory |
256GB |
| Memory Type |
DDR5, up to 7600+ MT/s (OC), ECC and non-ECC unbuffered |
| Memory Profiles |
AMD EXPO, ASUS AEMP |
| Expansion & Storage |
| PCIe Slots |
1 x PCIe 4.0 x16 (x16 with Ryzen 9000/7000; x8/x4 with Ryzen 8000); 2 x PCIe 3.0 x16 (x1 mode) |
| M.2 Slots |
3 x M.2 (Key M): M.2_1 PCIe 4.0 x4 (2280); M.2_2 PCIe 4.0 x4; M.2_3 PCIe 3.0 x4 (chipset) |
| SATA |
4 x SATA 6Gb/s |
| RAID |
AMD RAIDXpert2: RAID 0/1/5/10 (Ryzen 9000), 0/1 (Ryzen 8000), 0/1/10 (Ryzen 7000) |
| Connectivity |
| Graphics Outputs |
2 x DisplayPort 1.4 (up to 8K@30Hz), 1 x HDMI 2.1 (4K@60Hz) |
| Ethernet |
1 x Realtek 2.5Gb with ASUS LANGuard |
| Wireless |
Wi-Fi 6E 2x2, 2.4/5/6GHz |
| Bluetooth |
Bluetooth 5.3 |
| Rear USB |
2 x USB 10Gbps Type-A, 1 x USB 5Gbps Type-C, 4 x USB 2.0 Type-A |
| Front USB |
1 x USB 5Gbps Type-C connector, 1 x USB 5Gbps header (2 ports), 2 x USB 2.0 headers (4 ports) |
| Rear I/O |
USB ports, 2 x DP, HDMI, Wi-Fi module, 2.5Gb LAN, 3 x audio jacks, BIOS FlashBack button |
| Audio |
| Audio Codec |
Realtek 7.1 HD Audio, up to 24-bit/192kHz |
| Software & BIOS |
| Fan Headers |
1 x CPU, 1 x CPU OPT, 1 x AIO pump, 3 x chassis fan (4-pin) |
| RGB Headers |
3 x Addressable Gen 2 |
| Power Connectors |
1 x 24-pin, 1 x 8-pin +12V |
| Special Features |
Q-Antenna, Q-Dashboard, Q-LED Core, M.2 heatsink, pre-mounted I/O shield, AI Cache Boost |
| BIOS |
256Mb Flash ROM, UEFI AMI BIOS, BIOS FlashBack |
| Operating System |
Windows 11, Windows 10 64-bit |
| Warranty |
| Warranty Type |
Official ASUS warranty |
