The Gigabyte B550M K Motherboard supports AMD Ryzen 5000 Series/Ryzen 5000 G-Series/Ryzen 4000 G-Series and Ryzen 3000 Series processors, features 4 x DDR4 slots, PCIe 4.0, PCIe 3.0, 2 x M.2 slots (1 x CPU and 1 x Chipset), 4 x SATA 6GB/s ports, 6 x USB 2.0 (4 x back, 2 x internal USB header), 2 x USB 3.2 Gen1 (internal USB header), 4 x USB 3.2 Gen1 (back panel),1 x HDMI, 1 x PS/2 keyboard/mouse port, 1 x DisplayPort, 1 x RJ45, 3 x audio backs, Realtek GbE LAN chip, Realtek Audio CODEC.

AMD B550 Ultra Durable Motherboard with Digital VRM Solution, PCIe 4.0 x16 Slot, Dual PCIe 4.0/3.0 M.2 Connectors, GbE LAN, Smart Fan 5 with FAN STOP

• Supports AMD Ryzen™ 5000 Series/ Ryzen™ 5000 G-Series/ Ryzen™ 4000 G-Series and Ryzen™ 3000 Series Processors
• Dual Channel ECC/ Non-ECC Unbuffered DDR4, 4 DIMMs
• Ultra Durable™ PCIe 4.0 Ready x16 Slot
• Dual Ultra-Fast NVMe PCIe 4.0/3.0 M.2 Connectors
• High Quality Audio Capacitors and Audio Noise Guard for Ultimate Audio Quality
• GbE LAN with Bandwidth Management
• Rear DisplayPort and HDMI for Multi-display Support
• Smart Fan 5 Features Multiple Temperature Sensors, Hybrid Fan Headers with FAN STOP
• Anti-Sulfur Resistors Design

• Solid Pin Power Connector
• USB 2.0*4
• DisplayPort + HDMI
• USB 3.2 Gen 1* 4
• GbE LAN
• Ultra Durable PCIe Slot
  PCIe® 4.0 Slot
  Running 1 x16
• Audio Noise Guard
• High-End Audio Capacitors
• Dual Channel DDR4, 4 DIMMs
• Supports AMD Ryzen™ Processors
• Dual M.2 Connectors
  2280 M.2
  NVMe PCIe® 4.0/3.0 x4 & SATA Mode (from CPU)
  1x PCIe 4.0® M.2 Slot
  2280 M.2
  NVMe PCIe 3.0 x2 (from Chipset)
• SATA3*4
• Smart Fan 5 + FAN STOP
  3 Fan Connectors
  5 Temperature Sensors

PCIe 4.0* Hardware Design

PCIe 4.0 Slot

PCIe 4.0 x16 slot with faster bandwidth and lower impedance.

M.2 PCIe 4.0 Slot

M.2 PCIe 4.0 x4 slot with Lower impedance.