The MSI MAG B850M MORTAR WIFI is a compact Micro-ATX motherboard designed for AMD processors, built around the AMD B850 chipset and compatible with AMD Ryzen 7000, 8000, and 9000 Series CPUs using the Socket AM5 platform. Finished in black, the board measures 244 x 243.8 mm and offers a solid foundation for both everyday builds and performance-oriented systems. It supports up to 256 GB of DDR5 memory across four DIMM slots in a dual-channel configuration, with speeds starting at 4800 MHz and overclocked speeds reaching beyond 8200 MHz. For display output, the board includes one HDMI 2.1 port.
Storage and Expansion
The MSI MAG B850M MORTAR WIFI offers extensive storage options, featuring three M.2 slots, with the first two supporting PCIe 5.0 and the third supporting PCIe 4.0, all accommodating up to 2280 form factor drives. In addition, four SATA III connectors provide further storage flexibility. For expansion, one PCIe 5.0 x16 slot is available for a dedicated graphics card.
Connectivity and Audio
The board is well-equipped for both wired and wireless connectivity, featuring Wi-Fi 7 (802.11be), Bluetooth 5.4, and a 5 Gbps wired LAN port powered by a Realtek RTL8126VB controller. The USB offering is extensive, including USB 3.2 Gen 2 Type-A and Type-C ports alongside multiple USB 3.2 Gen 1 and USB 2.0 connections. Audio is handled by a Realtek ALC4080 chip delivering 7.1 channel output, complemented by S/PDIF output support.
Product number manufacturer:
MAG B850M MORTAR WIFI
Audio
BIOS
Connectivity
USB 3.2 (Gen 1) type A ports:
6
USB 3.2 (Gen 2) type A ports:
3
USB 3.2 (Gen 2) type C ports:
1
Expansion slots
Internal I/O
1st M.2 maximum slot size:
2280
1st M.2 slot PCI Express generation:
5.0
2nd M.2 maximum slot size:
2280
2nd M.2 slot PCI Express generation:
5.0
3rd M.2 maximum slot size:
2280
3rd M.2 slot PCI Express generation:
4.0
ATX Power connector (24-pin):
Front panel audio connector:
USB 3.1 (3.1 Gen 2) connectors:
1
USB 3.1 (Gen 1) header(s):
2
Memory
Supported memory clock speeds:
4800 MHz
Supported memory clock speeds (OC):
8200+ (OC) MHz
Networking
Network technology (wired):
Physical characteristics
Processor
Compatible processor series:
AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Sockets
Technical details
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