The PCIUSB3S2 2-Port PCI to Super Speed USB (Universal Serial Bus) 3.0 Card allows for legacy PCI slots to support the USB (Universal Serial Bus) 3.0 standard, which is capable of data transfer rates up to 5 Gbps (10x faster than USB (Universal Serial Bus) 2.0). Using USB (Universal Serial Bus) 3.0 devices with this Card will allow data transfer rates at up to 1.3 Gbps, double the performance versus using USB (Universal Serial Bus) 2.0 cards & peripherals. Backward compatible with USB (Universal Serial Bus) 2.0 & 1.x devices, this versatile PCI USB (Universal Serial Bus) 3.0 card will work with any future USB (Universal Serial Bus) 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 & up-to-date with the latest USB (Universal Serial Bus) technology.