PCIe 1.x card expands your desktop to support two SuperSpeed USB 3.0 Ports * Market leading Renesas µPD720202 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