Upgrade your desktop computer to SuperSpeed USB 3.0 with our new 2-Port PCI-e Express SuperSpeed USB 3.0 Host Card. Now you can transfer files, photos, and videos at blazing speeds of up to 5Gbps! And Backups are faster than ever. These are fully reverse compatible so you can still run make use of your USB 2.0 devices.Specifications : USB 3.0 interface (10x faster than USB 2.0) Supports 2-USB 3.0 Type-A-ports Compliant with PCI-Express revision 1.0a. Backward compatible to USB 2.0 & USB 1.1 specification Data transfer rate: up to 5Gbps Fully Plug&Play Supports Hot-Swap: Plug & Play Devices Without Rebooting Requires 15-pin SATA Power Connector Requirements : Windows XP/Vista/7 (32/64 bit OS) PCI Express Enabled System w/ Available PCI Express Slot Retail Package Content :PCI-Express USB3.0 card Drivers CD .