Description: Super speed USB 3.0 supports transfer rate up to 5Gbps. 4 USB3.0 ports, simultaneously enjoy the convenience of plug-and-play. Suitable for all motherboard with PCI-E slot, PCI-E is a common part of motherboard. Automatically backwards compatible with USB 2.0 and 1.1. Operating System compatibility: Windows XP/7/8/2000/Vista. Package Includes: 1Pcs riser card 1Pcs driver CD