UCEC Two Port USB 3.0 Slot Plate Adapter Bracket Cable with Built-In 20-Pin Header F/2AF PCI Weight:85g Support: WINDOWS2003/2007/XP/Vista/WIN7/WIN8 Transfer rate: up to 5 Gbps when connected with a USB 3.0 compliant host and device This lets you add USB ports without having to take up any PCI slots One note for anyone not familiar with usb headers. Your motherboard needs to have the usb3.0 header on it to use this cable.