PCI-Express 2 Ports USB 3.0 Controller Card. PCI-Express 2.0 1-Lane (1x) interface. NEC uPD720200 USB 3.0 controller chipset. Fully compliant with PCI Express Base specification revision 2.0. Support PCI-Bus Power Management Interface Specification Revision 1.2. Internal HDD power connector for supplying extra +5Vpower to the USB ports. Single-lane (x1) PCI Express throughput rates up to 5 Gbps. Compliant with Universal Serial Bus 3.0 specification revision 1.0. Supports simultaneous operation of multiple USB 3.0, 2.0, 1.1 devices. Supports Low-speed, Full-speed, High-speed, Super-speed. Supports 1.5 Mbps, 12Mbps, 480Mbps, 5Gbps data rates. Supports half downstream ports for all speeds. Built-in 4-pin molex power connector for extra power supply from system. System Requirement: Hardware: Computer with PCI-Express slot. Windows 2000/Server 2003/XP 32-bit & 64-bit/Vista 32-bit & 64-bit/7 32-bit & 64-bit. 4-pin Molex power connector required for high power consumption USB devices