GIGABYTE B550M-K Motherboard AMD AM4 DDR4 Micro-ATX PCIe 4.0 Dual M.2

The GIGABYTE B550M-K Motherboard is a Micro-ATX board built on the AMD B550 chipset with the AM4 socket, designed to support AMD Ryzen 5000 Series, Ryzen 4000 G-Series, and Ryzen 3000 Series processors. It features a Digital VRM Solution with a 3+3 power phase design, 4 DDR4 DIMM slots supporting up to 128GB at 4733MHz (OC), and an Ultra Durable PCIe 4.0 Ready x16 slot for high-performance graphics cards.

Performance and Power Delivery

The GIGABYTE B550M-K Motherboard utilizes a Digital VRM Solution with a 3+3 power phase design to deliver stable power to AMD Ryzen processors. The AM4 socket supports a wide range of CPUs including the latest Ryzen 5000 Series, giving builders flexibility in choosing their processor tier. With Dual Channel ECC/Non-ECC Unbuffered DDR4 memory support across 4 DIMM slots, users can install up to 128GB of RAM with overclocking speeds reaching 4733MHz for demanding workloads and gaming scenarios.

Storage and Expansion

Storage connectivity on the GIGABYTE B550M-K Motherboard includes dual Ultra-Fast NVMe M.2 connectors — one supporting PCIe 4.0/3.0 x4 and the other PCIe 3.0 x2 with SATA mode compatibility. The primary M.2 slot (M2A_CPU) leverages the CPU’s PCIe 4.0 lanes when paired with Ryzen 5000 or 3000 Series processors, enabling blazing-fast SSD transfer speeds. Additionally, 4x SATA 6Gb/s ports provide ample connectivity for traditional hard drives and SSDs, while the PCIe 4.0 Ready x16 slot ensures compatibility with the latest graphics cards.

Connectivity and I/O

The GIGABYTE B550M-K Motherboard features Realtek 1GbE LAN with bandwidth management for reliable wired networking. The rear I/O includes 1x DisplayPort 1.4 supporting up to 5120×2880@60Hz with HDCP 2.3 and HDR, and 1x HDMI 2.1 port supporting up to 4096×2160@60Hz with HDCP 2.3 and HDR, enabling multi-display setups with AMD Radeon integrated graphics. USB connectivity includes USB 3.2 Gen 1 and USB 2.0 ports for peripheral expansion. The maximum shared graphics memory is 16GB.

Cooling and Audio

Smart Fan 5 technology on the GIGABYTE B550M-K Motherboard incorporates multiple temperature sensors and hybrid fan headers with FAN STOP functionality, allowing precise thermal management and silent operation when temperatures are low. The audio section features High Quality Audio Capacitors paired with an Audio Noise Guard design to minimize electromagnetic interference and deliver clean, immersive sound for gaming and media consumption. Anti-Sulfur Resistors are used throughout the board to enhance long-term durability, and Q-Flash Plus enables convenient BIOS updates without requiring a CPU or memory to be installed.