MSI MAG B550M Mortar Wifi AM4 DDR4 AMD Motherboard

The MSI MAG B550M Mortar WiFi is a Micro-ATX motherboard built on the AMD B550 chipset with an AM4 socket, designed to support 3rd Gen AMD Ryzen processors and compatible with future AMD Ryzen processors via BIOS update. Its compact 9.6 x 9.6 in (24.4 x 24.4 cm) footprint makes it well suited for space-efficient gaming and productivity builds that do not compromise on connectivity or expandability. For storage, the board provides six SATA 6Gb/s ports and two M.2 Key-M slots. The primary M.2 slot (M2_1) draws its bandwidth directly from the AMD processor and supports both PCIe 4.0/3.0 x4 and SATA 6Gb/s, while the secondary slot (M2_2) operates via the B550 chipset at PCIe 3.0 x4. Both slots accommodate 2242, 2260, and 2280 form-factor drives. RAID configurations (0, 1, 10) are supported for SATA devices and RAID 0/1 for M.2 NVMe drives. Memory is handled by four DDR4 UDIMM slots in a dual-channel configuration supporting up to 128 GB. Native JEDEC speeds run from 1866 to 3200 MHz, while A-XMP overclocking profiles extend support to 4400 MHz (1DPC 1R). The board accepts non-ECC unbuffered memory and ECC UDIMM modules operated in non-ECC mode. Connectivity is a clear strength. Wired networking is served by a Realtek RTL8125B 2.5 Gbps LAN controller, and wireless is handled by an Intel Wi-Fi 6 AX200 module pre-installed in the M.2 Key-E slot — supporting 802.11 a/b/g/n/ac/ax, MU-MIMO TX/RX, 2.4 GHz and 5 GHz (160 MHz) up to 2.4 Gbps, plus Bluetooth 5.1. USB options span USB 3.2 Gen 2 10 Gbps (Type-A and Type-C on the rear panel), USB 3.2 Gen 1 5 Gbps, and USB 2.0 across both rear-panel and internal headers. Audio is provided by a Realtek ALC1200 codec delivering 7.1-channel HD audio with S/PDIF optical output. Display output for APU-based configurations reaches 4096×2160 at 60 Hz via DisplayPort and 4096×2160 at 24 Hz via HDMI. Expansion slots include one PCIe 4.0/3.0 x16 (PCI_E1), one PCIe 3.0 x16 running at x4 (PCI_E4), and two PCIe 3.0 x1 slots, with support for 2-Way AMD CrossFire. The power delivery uses an 8+2+1 Duet Rail Power System with Digital PWM and Core Boost technology. Thermal management includes an extended heatsink with a choke thermal pad rated at 7 W/mK and a PCB featuring 2 oz thickened copper layers. Fan control headers include one 4-pin CPU fan, one 4-pin water-pump fan connector, and three 4-pin system fan headers. RGB lighting is accommodated via one 4-pin RGB LED header and two 3-pin ARGB (RAINBOW) headers. A Flash BIOS Button on the rear I/O panel allows firmware updates without a CPU installed. Verified Specifications: - Form Factor: Micro-ATX, 9.6 x 9.6 in (24.4 x 24.4 cm) - Socket / Chipset: AM4 / AMD B550 - Memory: 4x DDR4, up to 128 GB, JEDEC up to 3200 MHz, A-XMP OC up to 4400 MHz - Storage: 6x SATA 6Gb/s; 2x M.2 (PCIe 4.0/3.0 x4 + PCIe 3.0 x4) - LAN: Realtek RTL8125B 2.5 Gbps - Wireless: Intel Wi-Fi 6 AX200, up to 2.4 Gbps, Bluetooth 5.1 - Audio: Realtek ALC1200, 7.1-channel HD, S/PDIF out - USB (rear): 2x USB 3.2 Gen 2 10 Gbps (1x Type-A, 1x Type-C), 2x USB 3.2 Gen 1 5 Gbps Type-A, 2x USB 2.0 Type-A - Display: 1x HDMI (4K@24Hz), 1x DisplayPort (4K@60Hz) - Warranty: 3 Years