Aitech USB 3.0 to PCI-E Card with 7 USB 3.0 Ports and 4-Pin Power Connector for Desktops PCIe card expands your desktop to support seven SuperSpeed USB 3.0 Ports Fully compliant with USB 3.0 revision 1 and Intel xHCI rev 1.0 specifications Backwards compatible with USB 2.0 and 1.1 devices.OS Capatability: Windows 7 (32-bit/64-bit), Windows Vista (32-bit/64-bit), Windows XP Standard 4-pin connector to power USB devices from your PC power supply The PCI-E Port only support PCI-E X1/X16 slots