Build a compact yet powerful AM5 system with this micro-ATX AMD B850 motherboard, ready for Windows 10/11 and Ryzen 7000/8000G/9000 series CPUs. It supports up to 256GB DDR5 across four DIMM slots, with overclocking up to DDR5-8200 (OC) for high-performance gaming and productivity. Storage is future-ready with 3x M.2 slots (two PCIe Gen5 and one PCIe Gen4) plus 4x SATA for additional drives. Connectivity is top-tier with 5G LAN, Wi-Fi 7, and Bluetooth 5.4, alongside fast USB including USB-C 20Gbps. Enjoy premium Realtek ALC4080 audio, 7 PWM fan headers, and Mystic Light RGB/ARGB headers for a cool, stylish build. Includes EZ Wi-Fi antenna and handy EZ M.2 accessories.
MSI MAG B850M MORTAR WIFI (AM5)
| type | Mainboard |
| Color | black |
| EAN | 4711377321150 |
| Manufacturer's No. | 7E61-001R |
| base | AM5 |
| Maximum supported CPUs | 1 |
|
operating system |
|
| Support |
Windows 10 ready, Windows 11 ready |
| processor | |
| Supported models |
Ryzen 5 7xxx (Raphael), Ryzen 5 7xxxX (Raphael), Ryzen 5 7xxxF (Raphael), Ryzen 5 7xxxX3D (Raphael), Ryzen 5 8xxxF (Phoenix), Ryzen 5 8xxxG (Phoenix), Ryzen 5 9xxx (Granite Ridge), Ryzen 5 9xxxX (Granite Ridge), Ryzen 7 7xxx (Raphael), Ryzen 7 7xxxX (Raphael), Ryzen 7 7xxxX3D (Raphael), Ryzen 7 8xxxG (Phoenix), Ryzen 7 8xxxF (Phoenix), Ryzen 7 9xxxX (Granite Ridge), Ryzen 7 9xxxX3D (Granite Ridge), Ryzen 9 7xxx (Raphael), Ryzen 9 7xxxX (Raphael), Ryzen 9 7xxxX3D (Raphael), Ryzen 9 9xxxX (Granite Ridge), Ryzen 9 9xxxX3D (Granite Ridge) |
| Chipset | AMD B850 |
| slots | |
| PCIe x16 |
1x (of which: 1x PCIe x16) |
| PCIe x4 | 1 |
| BIOS | |
| EFI BIOS | Yes |
| Form factor | µATX |
| use | PC |
| power supply |
ATX12V (24-Pin + 2x 8-Pin) |
| memory | |
| maximum | 256 GB |
| Number of sockets | 4x DDR5 |
| supported standards |
DDR5 - 8200 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s |
| Channels | 2 |
| Maximum storage ranks | 8 |
| Memory controller in CPU | Yes |
| Maximum data density | 8192 Mbit |
|
External connections |
|
| USB-C 3.2 Gen 2x2 (20 Gbit/s) | 1 |
| USB-C 3.2 Gen 2 (10 Gbit/s) | 1 |
| USB-A 3.2 Gen 2 (10 Gbit/s) | 3 |
| USB-A 3.2 Gen 1 (5 Gbit/s) | 4 |
| A notice: |
The designation USB 3.2 Gen 1 corresponds to the earlier designations USB 3.1 Gen 1 and USB 3.0. |
| HDMI | 1 |
| Line-In | 1 |
| Line-Out | 1 |
| S/PDIF output (optical) | 1 |
| RJ-45 | 1 |
| Bluetooth | Yes |
| Wi-Fi | Yes |
|
Internal connections |
|
| SATA | 4 |
| M.2 | 3 |
| M.2 Module Key | M |
| M.2 Slot 1 | PCIe Gen 5.0 |
| M.2 Slot 2 | PCIe Gen 5.0 |
| M.2 Slot 3 | PCIe Gen 4.0 |
| A notice: |
The actual usable speed of their M.2 SSDs depends on the combination of CPU, motherboard slot and chipset. |
| M.2 interface | PCIe |
| M.2 Length | 60 - 80 mm |
| RGB LED Header | 1 |
| addressable RGB LED header | 3 |
| 4-pin PWM fan | 7 |
|
Connections (optional) |
|
| USB 3.2 Gen 1 (5 Gbit/s) | 2 |
| USB-C 3.2 Gen 1 (5 Gbit/s | 1 |
| USB 2.0 | 4 |
| TPM | Yes |
| RGB Standard | Mystic Light |
| SATA controller | AMD B850 |
| directly usable RAID levels | 36535 |
| USB controller | AMD B850 |
| Onboard graphics |
The motherboard's graphics ports can only be used when using a CPU with an integrated graphics chip. |
| Sound |
Realtek ALC4080 |
| LAN |
Realtek 8126-VB 5G LAN |
|
WiFi 7 + Bluetooth 5.4 |
|
| Further information |
To support the latest processor cores, a BIOS update may be required. |
| Accesories | |
| available |
1x SATA cable, 2x EZ M.2 clips, 1x M.2 screws, EZ M.2 clip remover, EZ Wi-Fi antenna, 1 to 2 EZ Conn cable, EZ front panel cable |
| Dimensions |
Width: 244 mm x Height: 244 mm |
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