Gigabyte B550M K WIFI6E AMD B550 Micro-ATX Motherboard — AM4 | DDR4 | Wi-Fi 6E | PCIe 4.0

The Gigabyte B550M K WIFI6E is built for AMD Ryzen builders, gamers, home office users, and everyday PC assemblers who want a complete, wireless-ready B550 Micro-ATX platform with Wi-Fi 6E and Bluetooth 5.3 built-in, eliminating the need for a separate wireless adapter. It is well-suited for gaming builds using Ryzen 5000 Series CPUs with PCIe 4.0 GPUs and NVMe SSDs, compact ATX case builds, home office and multimedia systems, and wireless-first setups that need tri-band Wi-Fi 6E and fast wired GbE LAN simultaneously.

The B550M K WIFI6E features a Digital VRM solution with Low RDS(on) MOSFETs for clean, stable CPU power delivery across AMD Ryzen 3000 through 5000 Series platforms. An Ultra Durable PCIe 4.0 x16 reinforced slot supports the latest discrete GPUs and NVMe SSDs at full PCIe 4.0 bandwidth on compatible Ryzen 5000 and 3000 Series CPUs. Dual M.2 connectors support fast NVMe storage — the first M.2 (M2A_CPU) supports PCIe 4.0 x4 NVMe and SATA on Ryzen 5000/3000 CPUs, while the second (M2B_SB) supports PCIe 3.0 x2 NVMe from the chipset — enabling high-speed primary and secondary NVMe SSD configurations. MediaTek Wi-Fi 6E MT7902 provides tri-band 2.4/5/6 GHz wireless connectivity at 802.11ax speeds with 160MHz channel support and Bluetooth 5.3, while the innovative WIFI EZ-Plug design simplifies antenna installation versus traditional screw-type connectors. Realtek GbE LAN ensures fast and reliable wired networking. HDMI 2.1 (up to 4K@60Hz) and DisplayPort 1.4 (up to 5K@60Hz) rear outputs support dual-display configurations with HDR and HDCP 2.3 via AMD Radeon Graphics-enabled G-Series CPUs. Realtek 7.1-channel HD audio with high-quality capacitors and PCB-level audio noise guard deliver clean, accurate audio. Smart Fan 6 provides 5 temperature sensors and 2 hybrid PWM/DC fan headers with 7-point fan curves, Slope/Stair dual graph modes, and FAN STOP for near-silent idle operation. Four DDR4 DIMM slots support up to 128GB at speeds up to DDR4-4733 (OC) with XMP and ECC Unbuffered support. Anti-Sulfur Resistor protection and Glass Fabric PCB design ensure long-term board reliability in demanding environments.

Form Factor: Micro-ATX (24.4 cm × 24.4 cm)
Socket: AMD AM4
Chipset: AMD B550
Supported CPUs: AMD Ryzen 5000 Series / 5000 G-Series / 4000 G-Series / 3000 Series / 3000 G-Series (AM4)
Memory Slots: 4× DDR4 DIMM
Max Memory: 128GB (32GB per DIMM)
Memory Speed: DDR4-4733 (OC) / 4600 / 4400 / 4266 / 4133 / 4000 / 3866 / 3733 / 3600 / 3466 / 3400 / 3200 / 2933 / 2667 / 2400 / 2133 MT/s; XMP supported; ECC Unbuffered supported
PCIe Slots: 1× PCIe 4.0 x16 (CPU — Ryzen 5000/3000) / PCIe 3.0 x16 (G-Series) | 1× PCIe 3.0 x1 (Chipset)
M.2 Slots: 1× M.2 (M2A_CPU) — PCIe 4.0 x4 / PCIe 3.0 x4 NVMe + SATA, type 2280 | 1× M.2 (M2B_SB) — PCIe 3.0 x2 NVMe, type 2280
SATA Ports: 4× SATA 6Gb/s (RAID 0 / 1 / 10 support)
Display Output: 1× HDMI 2.1 (max 4096×2160@60Hz, HDCP 2.3, HDR) | 1× DisplayPort 1.4 (max 5120×2880@60Hz, HDCP 2.3, HDR)
Audio: Realtek HD Audio CODEC, 7.1-channel, High-Quality Audio Capacitors, Audio Noise Guard
LAN: Realtek GbE LAN (1 Gbps / 100 Mbps / 10 Mbps)
Wireless: MediaTek Wi-Fi 6E MT7902 — 802.11a/b/g/n/ac/ax, 2.4/5/6 GHz, 160MHz | Bluetooth 5.3
Antenna: WIFI EZ-Plug (quick-install antenna design, 1T1R)
Back Panel USB: 4× USB 3.2 Gen 1 (Type-A) | 4× USB 2.0/1.1 | 1× PS/2
Internal USB Headers: 1× USB 3.2 Gen 1 header | 1× USB 2.0/1.1 header
Fan Headers: 1× CPU fan | 1× System fan (PWM/DC hybrid, Smart Fan 6, FAN STOP, up to 24W per header)
Power Connectors: 1× 24-pin ATX | 1× 8-pin ATX 12V (Solid Pin)
Additional Headers: TPM header (2×6 pin, GC-TPM2.0_S compatible), Clear CMOS jumper, Front panel header, Front panel audio header
BIOS: 128 Mbit flash, AMI UEFI BIOS, Q-Flash support
Operating System: Windows 11 64-bit / Windows 10 64-bit
Software: GIGABYTE APP Center (@BIOS, EasyTune, Smart Backup, System Information Viewer), Norton Internet Security (OEM)

System Requirements: AMD AM4 CPU (Ryzen 5000 Series/5000 G-Series/4000 G-Series/3000 Series/3000 G-Series); DDR4 memory modules; BIOS update may be required for some CPU support — verify on Gigabyte's CPU support list; PCIe 4.0 M.2 and x16 slot speeds require Ryzen 5000 or 3000 non-G-Series CPU; display output via HDMI/DP requires an AMD Radeon Graphics-enabled G-Series APU or discrete GPU

Setup: Standard Micro-ATX installation; WIFI EZ-Plug antenna connects without tools; Q-Flash for BIOS updates from USB; Smart Fan 6 curves configurable in BIOS or GIGABYTE APP Center; XMP activation in BIOS for rated memory speeds

Mounting Options: Micro-ATX form factor (24.4 cm × 24.4 cm); compatible with Micro-ATX and full-size ATX cases

Usage Environment: Ideal for AMD Ryzen 5000 gaming builds, Wi-Fi 6E wireless home and office PCs, compact ATX case builds, and mainstream to performance AMD desktop systems requiring dual NVMe M.2, PCIe 4.0, and tri-band Wi-Fi 6E with Bluetooth in one board