adds 4 x usb 3. 0 ports to your pc using the pcie slot. connections: 4 x type a socket, external pcie gen2 x1 cardeach port is separately protected against short circuits and excessive current consumption with a semiconductor fuserenesas / nec chipset upd720201bus: pciesupports usb 3. 0, usb 2, 0 and usb 1. 1 supports usb 3. 0 specificationsdata transfer: superspeed (5gbps), highspeed (480mbps), fullspeed (12mbps) and lowspeed (1. 5 mbps)compatible with pci express specification 2. 015-pin sata- or 4pin molex current connection (5v from atx power supply)suitable for standard slot and low profile. Low profile slotted panel included in delivery. operating systems (32bit/64bit): win xp/vista/7 / 64bit 2008 r2 / 8