USB 3.2 Gen2x2 20Gbps; Support PCIe v4.0 / v3.0 / v2.0; PCIe Gen3 x4 Latest Multi-OS Compatibility, No Drivers Required; Maximum Bandwidth and Transfer Speed Paired well with Vantec NST-220C3-SG (20Gbps enclosure); Backward compatibility with 10Gbps, 5Gbps and other legacy USB Standard and Low Profile bracket included; Easy to Install using Plug and Ready, No Power Plug required Single Port 20Gbps