MSI MAG B850M MORTAR WIFI AM5 Micro‑ATX Motherboard (B850, DDR5, Wi‑Fi 7, 5G LAN)

Description

Overview

The MSI MAG B850M MORTAR WIFI is an AM5 micro‑ATX motherboard designed for compact gaming and productivity builds. It uses the AMD B850 chipset and supports AMD Ryzen™ 7000, 8000 and 9000 series desktop processors, offering DDR5 memory support, PCIe 5.0 for the primary GPU slot and generous storage options including two PCIe Gen5 M.2 slots. This makes it suitable for enthusiasts who want high‑speed storage and modern connectivity in an mATX footprint.

Key features

• AM5 socket supporting Ryzen™ 7000 / 8000 / 9000 series CPUs.
• 4× DDR5 UDIMM slots, maximum 256GB; memory support listed up to DDR5‑8200 (OC) with AMD EXPO support.
• PCIe: 1× PCIe 5.0 x16 (CPU), 1× PCIe 4.0 x4 (chipset).
• Storage: 3× M.2 (M.2_1 & M.2_2: PCIe Gen5 x4; M.2_3: PCIe Gen4 x2) and 4× SATA 6Gb/s.
• Connectivity: onboard Wi‑Fi 7 module (Key‑E) with Bluetooth 5.4 and Realtek 5G LAN; USB includes a USB 20Gbps Type‑C rear port.
• Audio: Realtek ALC4080 codec with 7.1‑channel support and Audio Boost features.

Physical dimensions follow the mATX standard (243.84 × 243.84 mm), giving flexibility for smaller cases while retaining high‑end connectivity. MSI supplies features such as EZ PCIe Release, M.2 Shield Frozr II, and an extended heatsink design to support sustained CPU loads. Review the motherboard’s support page for memory QVLs and the latest BIOS releases — certain CPU/memory combinations and M.2 lane behaviours depend on the CPU model and BIOS version.