Mediasonic HP1-U34F 4 Ports External USB 3.0 PCI Express Card 4 x USB 3.0 SuperSpeed transfer rate up to 5.0 Gbps, backward compatible with USB 2.0 and 1.1 devices Support OS: Windows XP / 7 / 8 / 8.1 / 10 5V SATA Power connector to power USB devices from your PC power supply. SATA to 4 Min Molex Cable is also included Please Note: 5V SATA Power connector must connect to your PC's power supply to ensure sufficient power supply and fast transfer