Additional Details ------------------------------ Product description: StarTech PEXUSB3S7 PCI express USB 3.0 card allows you to extend your system capabilities by adding seven USB 3.0 ports. It is supported by Windows 8.1 and 8, Linux kernel 2.6.31, and other operating systems. StarTech PEXUSB3S7 PCI express USB 3.0 card allows you to extend your system capabilities by adding seven USB 3.0 ports. It has a unique dual-profile design. It features a SATA power connector with up to 900mA per port for high-power USB devices.