StarTech 2 Port PCI SuperSpeed USB3 Adapter Card The PCIUSB3S22 2-Port PCI to USB 3. 0 Card enables you to connect USB 3. 0 peripherals to a PC through a legacy PCI host bus, which doubles the data transfer speeds when used with USB 3. 0 peripherals than would be possible with a USB 2. 0 host connection - up to 1. 3 Gbps (PCI bus limit). The card features an optional SATA power connection, which enables each port to supply up to 900mA of power to USB 3. 0 bus-powered devices. By supporting a legacy (PCI) host connection, the card adds updated peripheral connectivity, without having to upgrade to a PCIe-equipped motherboard or rely on the backward compatibility of USB 3. 0 peripherals. Guaranteed to provide reliable performance, the PCIUSB3S22 PCI USB 3. 0 card is backed by lifetime warranty and free lifetime technical support.