StarTech.com 4 Independent Port PCI Express SuperSpeed USB 3.0 Controller Card Adapter with SATA Power PEXUSB3S400 Increase efficiency of your USB 3.0 devices with up to 5 Gbps of bandwidth on each port Fits into full or low profile/small form factor (SFF) systems, with a dual profile design Power high-powered USB devices as necessary, with the optional SATA power connector 4 Independent SuperSpeed USB 3.0 ports Horizontal (stacked) USB port design Built-in optional SATA power connector, provides up to 900mA per port for USB 3.0 devices (500mA for USB 2.0) Backward compatible with USB 2.0 and USB 1.0/1.1 devices Fully compliant with USB 3.0 rev 1.0 and Intel xHCI rev 1.0 specifications