StarTech 4-Port PCI Express PCIe SuperSpeed USB 3.0 Controller Card Adapter with SATA Power: * 4 external USB 3.0 ports in a stacked layout * Fully compliant with USB 3.0 revision 1.0 specifications and Intel xHCI rev0.95 specifications * Built-in optional SATA power connector for bus-powered USB devices * Optionally provides up to 900mA per USB port * Backward compatible with USB 2.0 and USB 1.0/1.1 devices * Compliant with PCI Express 2.0 specifications * Includes a low profile/half-height installation bracket