2 Pcs Super Speed USB 3.0 PCI-e Card At a Glance... USB 3.0 PCI-e card Transfer speeds up to 5Gbps 10 times faster than USB 2.0 Affordably priced and easy to use Uses high quality NEC chip that's made in Japan Comes with everything you need to get started Backwards compatible with USB 2.0 and 1.0 Manufacturer Specifications Main Function: USB 3.0 PCI card Mother Board Slot: PCI Express 2.0 Ports: Two USB 3.0 type A Speed: Up to 5Gbps Power Source: ATX 4 pin power connector and PCI slot Max Power Per Socket: 900mA to each USB 3.0 port Compatibility: Windows XP, Vista, Seven (tested on 32 bit only) Dimensions: 83mm x 68mm (L x H) Manufacturer Ref: GFH2TQ413BWUN Product Notes If you are unsure about the installation please hire a professional. Does not come with USB cable Backwards compatible with USB 2.0 and 1.0 Excellent Resale Item, our price on this USB 3.0 card is lower than anywhere else on the internet! Package Contents for CVTA-K112 USB 3.0 PCIe card CD with drivers User Manual English FAQ - Frequently Asked Questions Why do I still get USB 2.0 transfer speeds when I connect my USB flash drive? Unless the device you are connecting is USB 3.0 you won't be able to get the full transfer speeds. The device you connect must be USB 3.0 to take advantage of the speed gains of USB 3.0.