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Driver Link Smart Interactive Achieved with Gen2 VL805 USB3 host controller and Gen3 VL812 USB3 HUB controller from VIA-Labs This Booster USB3 PCI explicit card allow add 5 x Rear USB3 ports and 1 x inner USB3 20PIN connector to your computer easily through PCI explicit socket Dual via-labs USB3 controller supply move rates as much as 5Gbps, 10x faster than USB2 and backward like minded with USB2, 1 or 1 Supported Operating Systems Windows XP, Vista Vista, 2008, 7, Windows 8; Installation & Compatibility -ORICO Booster USB3 PCI Express Card Compatible with any Windows Desktop Computer with available PCI Express x1, x4, x8 or x16 Slot and can&;t slot in PCI Slot -Plug and play USB3 Host compatible with any USB3,2,1 and 1 Devices -Internal USB3 20PIN connector need work with USB3 20PIN Adapter to realize 2 x USB3 Hosts USB3 20PIN Adapter isn't always included in kit ORICO PVU3 sequence is not well matched with Mac OS; please select this series when upload USB3 ports for Mac, Or you can touch ORICO Customer Care Team for support if any disorders What is within the box 1 x ORICO Booster USB3 Host Car 1 x Mounting Screw 1 x User Manual 1 x Service Card 1 x 4-pin Power Cord