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MSI MAG B850M MORTAR WIFI AM5 AMD B850 Micro ATX Motherboard
- AMD B850
- Ryzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
- Support DDR5 8200 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s
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Overview
Specs
Reviews (15)
MAG B850M MORTAR WIFI is designed for gamers with a stable, durable and DIY friendly foundation for their PC builds. Coming up with true Wi-Fi 7 solution, 5G LAN, USB 20Gbps, PCIe 5.0 solutions, Supplemental PCIe Power, and exclusive EZ DIY features, it's ready for the battlefield of AMD Ryzen 9000 series processors.
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 3 years
- Limited Warranty period (labor): 3 years
- Read full details
Return Policies
- Return for refund within: 30 days
- Return for replacement within: 30 days
- This item is covered by Newegg.ca's Standard Return Policy.
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Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-626-271-1004
- Support Website
- View other products from MSI
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The MSI MAG B850M MORTAR WIFI is a Micro ATX AM5 motherboard for Ryzen 7000, 8000, and 9000 series processors, suited to gaming and performance-focused PC builds that need DDR5, a PCIe 5.0 graphics slot, Wi-Fi 7, and 5Gbps Ethernet.
Recommended For
- mATX gaming-PC builders using a Ryzen 7000 or 9000 desktop CPU who want one full-bandwidth PCIe 5.0 graphics-card slot, Wi‑Fi 7, and room for three NVMe drives.
- Compact-workstation or creator-PC builders who need several fast NVMe drives and multiple SATA drives without moving up to a full-size ATX motherboard.
- Home or small-office PC builders who use fast wired networking, Wi‑Fi 7, and a mix of USB-A and USB-C peripherals, and want those connections built into the motherboard.
- AM5 builders pairing the board with a high-end Ryzen CPU who want a compact system; The FPS Review tested it with a Ryzen 9 7900X and reported expected performance and reasonable VRM temperatures under sustained testing.
Real-World Use Scenarios
- Building a compact gaming PC around a Ryzen AM5 processor and a discrete graphics card: the micro-ATX board fits smaller compatible cases, and review testing found gaming results broadly in line with other tested B850 boards when paired with the same class of components. Actual frame rates depend primarily on the CPU, graphics card, and game settings.
- Choosing a smaller case for a new Ryzen build: this micro-ATX board supports Ryzen 7000, 8000, and 9000 processors, making it a fit for compact AM5 systems without requiring a full-size ATX motherboard. Check the case’s motherboard, cooler, and graphics-card clearance before buying parts.
- Adding storage for a game library or project files: three M.2 slots plus four SATA ports let a builder install several SSDs and drives without relying entirely on external storage. The third M.2 slot is more limited than the two CPU-connected slots, so check the supported speed for the installed Ryzen processor and the chosen drive.
- Connecting a desktop where fast networking matters: use the 5Gb Ethernet port for a compatible wired network, or Wi-Fi 7 when paired with a compatible router. The link speed and wireless benefits depend on the network equipment, service, and signal conditions.
- Building or upgrading a PC at home: the rear Flash BIOS button can help update motherboard firmware, while the EZ PCIe release and tool-less M.2 features are intended to make graphics-card and SSD installation or removal more convenient. Follow MSI’s manual for the required BIOS-update steps and component fit.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | AM5 desktop builds with supported Ryzen processors, DDR5 memory, PCIe graphics, and multiple M.2 or SATA drives |
| Processor And Platform | AM5 socket with AMD B850 chipset; supports Ryzen 7000, 8000, and 9000 Series processors |
| Memory Support And Configuration | Four DDR5 DIMM slots support up to 256GB in dual-channel mode, with speeds of DDR5 8200–5600 MT/s (OC) or 5600–4800 MT/s (JEDEC); supports AMD EXPO, non-ECC unbuffered memory, and CUDIMMs in clock-driver-bypass mode only |
| Expansion Slots | PCI_E1 supports up to PCIe 5.0 x16 with Ryzen 9000/7000, PCIe 4.0 x8 with Ryzen 8700/8600/8400, or PCIe 4.0 x4 with Ryzen 8500/8300; PCI_E2 supports up to PCIe 4.0 x4 |
| Storage And RAID | Three M.2 slots support processor-dependent PCIe 5.0 or PCIe 4.0 modes, plus four SATA 6Gb/s ports; supports RAID 0, 1, and 10 for SATA and RAID 0, 1, and 5 for M.2 NVMe, with M.2 RAID 5 limited to Ryzen 9000 Series |
| Wired And Wireless Networking | 5Gbps Ethernet with Wi-Fi 802.11be and Bluetooth 5.4 |
| Audio | Realtek ALC4080 audio with 7.1-channel support, two audio connectors, and optical S/PDIF output |
| Rear I/O | Includes HDMI, USB 10Gbps Type-A and Type-C, USB 20Gbps Type-C, USB 5Gbps Type-A, 5G LAN, Wi-Fi/Bluetooth antenna connectors, Clear CMOS and Flash BIOS buttons, two audio connectors, and optical S/PDIF out |
| Internal Headers And Cooling | Onboard USB headers provide four USB 2.0 ports, two USB 5Gbps Type-A ports, and one USB 10Gbps Type-C port; headers also include CPU, pump/combo, and system fan connections, front-panel and front-audio connections, three addressable RGB and one RGB connector, TPM 2.0, chassis intrusion, EZ Conn, and tuning controller |
| Power Connectors | One ATX power connector, two CPU power connectors, and one 8-pin PCIe power connector |
| Form Factor And Dimensions | Micro ATX motherboard measuring 9.6 × 9.6 inches |
| Operating System Compatibility | Supports Windows 11 64-bit |
| Model Identifiers | MSI MAG B850M MORTAR WIFI; model number MAGB850MMORTARWIFI |