ORICO Superspeed 7 Ports PCI-E to USB 3.0 Expansion Card - 5 Port USB3.0 interfaces and 2 Rear USB3.0 Port with Big 4PIN Interface for Power Supply VLI805 and VLI811 Chipset (PVU3-5O2U) One Step Update your Windows or Linux Computer to USB3.0 Easily with PCI Express to USB3.0 Controller Adapter Card Backwards compatible with USB 2.0 and 1.1; Compatible with Windows XP , 2003 , Vista , 2008 , 7 and Windows 8 32 Bit or 64 Bit with WHQL Certified Driver Filtering Unit with Solid Capacitors offer a Reliable and Secure Connectivity , Fit in any PCI-Express x1 , x2 , x4 , x8 or x16 Socket , Compliant with PCI Express Base Specification 2.0 USB 3.0 supports transfer rates of up to 5Gbps, the actual transfer speed is limited by the setting of the device connected Free Lifetime Technical Support.18 Month Warranty on Parts and Labor from ORICO or ORICO Direct Store ORICO PVU3 Series is NOT Compatible with Mac OS.Please Select ORICO PFU3 Series when add USB3.0 Ports for Mac