Tektrum PCIe PCI Express 4 Port Super-Speed USB 3.0 Adapter Card (VL805 Chipset) Supporting High Power USB Devices Engineering 4 external 5Gbps Super Speed USB 3.0 Ports; Reliable VL805 Chipset is employed; SuperSpeed USB 3.0 connectivity at up to 5 Gbps and 80% more power than USB 2.0 Fully compliant with Single-lane(x1) PCI Express 2.0 specification Fully Plug & Play and Hot Swap Compatible connect/disconnect devices; Bus-powered mode and no external power required for most of peripherals 4-pin power connector available for some high current consumption peripherals, like drives Fully compliant with USB 3.0, compatible with USB 2.0 and USB 1.1; Supports 2000/XP/Vista/Win7/Win8