4 USB 3.0 ports (3 external, 1 internal) with transfer rates of up to 5Gbps; backward compatible with USB 2.0 / 1.1. * Powers each USB port with a maximum 5V / 900 mA output. Supports hot swapping. * IDE connector to power USB devices from your PC power supply. The PCI-E port only supports PCI-E X1/X16 slots. * Supports Windows 8 / 7 / Vista / XP / 2000. * Package contents: 1 Anker PCI-E card, 1 driver CD, 1 4 Pin DC power to SATA Power Convertor Cable, 1 instruction manual.