The PCIUSB3S2 2-Port PCI to SuperSpeed USB 3.0 Card allows for legacy PCI slots to support the USB 3.0 standard, which is capable of data transfer rates up to 5 Gbps (10x faster than USB 2.0). Using USB 3.0 devices with this Card will allow data transfer rates at up to 1.3 Gbps, double the performance versus using USB 2.0 cards and peripherals. Backward compatible with USB 2.0 and 1.x devices, this versatile PCI USB 3.0 card will work with any future USB 3.0 devices, while still being able to support older devices. Designed for older PCI-based systems or computers with only PCI expansion slots left available, this adapter card allows those systems to stay relevant and up-to-date with the latest USB technology. Backed by a StarTech.com lifetime warranty and free lifetime technical support.