Plugable PCI Express to SuperSpeed USB 3.0 2-Port Expansion Card for Desktops (Latest Renesas &micro;PD720202 xHCI 1.0 chipset) PCIe 1.x card expands your desktop to support two SuperSpeed USB 3.0 Ports Market leading Renesas PD720202 chipset and USB 3.0 host software stack Fully compliant with USB 3.0 revision 1 and Intel xHCI rev 1.0 specifications No driver install required for Windows 8 or recent versions of Linux kernel (see below) Supports USB 3.0, 2.0, and 1.x devices at transfer speeds of 5000/480/12/1.5 Mbps