plugable pci express to superspeed usb 3.0 2-port expansion card nec renesas chipset
upgrade windows or linux based desktops with two additional super speed usb 3.0 capable ports . requires one free standard or low profile pci express x1 slot . recommended one free 4-pin molex cable from your pc power supply to support bus-powered usb devices . operating system support drivers for windows xp vista and windows 7 32 64-bit included on cdrom . open source linux support which recognize this card are present in kernels 2.6.31 . mac os x is not supported at this time . speed theoretical maximum speed of usb 3.0 is 5gbs and pcie 1x is 4gbs . included in package pcie card driver disk and both standard and low profile brackets . see plugable.com for additional tips support and information about this product .