This high speed serial interface enables fast data transfer from external peripherals such as external hard disks, digital cameras & video cameras. Twice the transfer rate of IEEE-1394a cards, it features two external ports & one internal header. IEEE-1394b is one of the fastest serial interface standards ever developed which makes it great for use with high-speed or bandwidth-intensive multimedia peripherals such as digital video cameras, audio, streaming & graphics. The HP IEEE-1394b Fire Wire 800 PCIe card is backward compatible to allow your IEEE-1394a devices to operate under the IEEE-1394b port with the use of a 1394a-to-1394b adapter cable. The PCIe card features two external IEEE-1394b ports located on the PCIe card bracket & one internal port header located on the PCIe card to connect to front panel 1394a port on HP Workstations.