MSI MAG B550 Tomahawk AM4 DDR4 AMD Motherboard

The MSI MAG B550 Tomahawk is a full-size ATX motherboard built on the AMD B550 chipset, designed for the AM4 socket and compatible with 3rd Gen AMD Ryzen processors, with support for future AMD Ryzen processors via BIOS update. It is a strong choice for PC builders who want a well-rounded platform combining PCIe 4.0 connectivity, robust power delivery, and a thoughtful thermal design without moving into X570 territory. At the heart of its power design sits a 10+2+1 Duet Rail Power System paired with Digital PWM, Core Boost, and DDR4 Boost technologies. The extended heatsink design incorporates choke thermal pads rated for 7 W/mK, and the PCB uses 2 oz thickened copper layers to handle sustained loads and keep temperatures in check during extended sessions. For storage, the board offers six SATA 6Gb/s ports and two M.2 Key-M slots. The primary M.2 slot (M2_1, fed by the AMD processor) supports PCIe 4.0/3.0 x4 and SATA 6Gb/s, accommodating 2242/2260/2280/22110 form factors. The secondary M.2 slot (M2_2, fed by the B550 chipset) supports PCIe 3.0 x4 and 2242/2260/2280 drives. RAID 0, RAID 1, and RAID 10 are available for SATA devices; RAID 0 and RAID 1 for M.2 NVMe drives. Memory support spans four DDR4 DIMM slots with a maximum capacity of 128 GB. JEDEC speeds up to 3200 MHz are natively supported, and A-XMP overclocking profiles extend that to 4866 MHz (1 DIMM per channel, single rank). The board supports non-ECC and ECC UDIMM memory (ECC in non-ECC mode only) in a dual-channel configuration. Connectivity is a clear highlight: dual onboard LAN controllers — a Realtek RTL8125B for 2.5 Gbps and a Realtek RTL8111H for 1 Gbps — are provided simultaneously. The rear USB array includes two USB 3.2 Gen 2 (10 Gbps) ports (one Type-A, one Type-C) and two USB 3.2 Gen 1 (5 Gbps) Type-A ports, all driven by the AMD processor. Audio is handled by a Realtek ALC1200 codec delivering 7.1-channel HD audio with optical S/PDIF output. MSI's Mystic Light system supports 16.8 million colours across 29 effects, with two 4-pin RGB and two 3-pin ARGB headers onboard. Verified Specifications: - Chipset: AMD B550 - Socket: AM4 - Form Factor: ATX (30.5 cm x 24.4 cm / 12 in. x 9.6 in.) - Memory: 4x DDR4 DIMM, up to 128 GB; JEDEC up to 3200 MHz; A-XMP OC up to 4866 MHz - Primary PCIe Slot: PCIe 4.0/3.0 x16 - M.2 Slots: 2x Key-M (M2_1: PCIe 4.0/3.0 x4 + SATA; M2_2: PCIe 3.0 x4) - SATA Ports: 6x SATA 6Gb/s - LAN: Realtek RTL8125B (2.5 Gbps) + Realtek RTL8111H (1 Gbps) - USB: 2x USB 3.2 Gen 2 10Gbps + 4x USB 3.2 Gen 1 5Gbps + 6x USB 2.0 - Audio: Realtek ALC1200, 7.1-CH HD, S/PDIF out - Multi-GPU: 2-Way AMD CrossFire - Power Design: 10+2+1 Duet Rail, Digital PWM - OS Support: Windows 10 64-bit - Warranty: 3 Years