MSI MPG B550 Gaming Plus AM4 DDR4 AMD Motherboard

The MSI MPG B550 Gaming Plus is an ATX-form-factor motherboard built on the AMD B550 chipset, designed for AMD Ryzen 3rd Generation processors (and compatible with future Ryzen processors via BIOS update) using the AM4 socket. It balances strong power delivery, PCIe 4.0 connectivity, and comprehensive thermal management for enthusiast gaming builds. At the heart of the board's power system is a 10+2+1 phase digital VRM with a Doubler Design, paired with MSI's Core Boost technology for clean, precise current delivery to the CPU. This ensures stable operation even under sustained multi-core workloads. The extended heatsink design covers both the VRM and the M.2 Shield Frozr thermal solution, helping SSD storage modules maintain consistent throughput under load. For storage, the MPG B550 Gaming Plus provides two M.2 Key-M slots: the primary M2_1 slot (sourced from the AMD processor) supports PCIe 4.0/3.0 x4 and SATA 6Gb/s, accommodating drive lengths from 2242 to 22110. The secondary M2_2 slot (from the B550 chipset) supports PCIe 3.0 x4 and accepts sizes up to 2280. Six SATA 6Gb/s ports round out storage options, with RAID 0, 1, and 10 support for SATA devices and RAID 0/1 for NVMe. Memory support spans four DDR4 DIMM slots for up to 128 GB of dual-channel RAM. JEDEC-standard speeds run from 1866 to 3200 MHz, while A-XMP overclocking profiles extend support up to 4400 MHz (1DPC 1R configuration). The board's expansion slots include one PCIe 4.0/3.0 x16 primary slot, one PCIe 3.0 x16 slot running at x4 speed, and two PCIe 3.0 x1 slots, with support for 2-Way AMD CrossFire. USB connectivity is extensive: the rear I/O offers two USB 3.2 Gen 2 (10 Gbps) ports—one Type-A and one Type-C—alongside two USB 3.2 Gen 1 (5 Gbps) Type-A ports and four USB 2.0 Type-A ports. Internal headers add further expansion. Audio is handled by a Realtek ALC892 codec delivering 7.1-channel HD audio with optical S/PDIF output. The Realtek 8111H controller provides Gigabit LAN. For builders using APUs, one HDMI and one DisplayPort output are available on the rear panel. RGB enthusiasts will find one 4-pin RGB header and two 3-pin RAINBOW (ARGB) headers, all manageable via MSI's Mystic Light software. The board also includes four EZ Debug LEDs for simplified troubleshooting, a Flash BIOS Button for BIOS recovery without a CPU, and a pre-installed I/O shield. Verified Specifications: - Socket: AM4 | Chipset: AMD B550 - Form Factor: ATX (12 in. × 9.6 in. / 30.5 cm × 24.4 cm) - Memory: 4× DDR4 DIMM, up to 128 GB; up to 4400 MHz (A-XMP OC) - PCIe: 1× PCIe 4.0/3.0 x16; 1× PCIe 3.0 x16 (x4 speed); 2× PCIe 3.0 x1 - Storage: 2× M.2 (PCIe 4.0/3.0 x4 + PCIe 3.0 x4); 6× SATA 6Gb/s - USB (rear): 2× USB 3.2 Gen 2 (10 Gbps); 2× USB 3.2 Gen 1 (5 Gbps); 4× USB 2.0 - Audio: Realtek ALC892, 7.1-ch HD Audio, S/PDIF optical out - LAN: Realtek 8111H Gigabit - VRM: 10+2+1 phase digital with Doubler Design - I/O Controller: NUVOTON NCT6687-R - Warranty: 3 Years