PCI Express 2 ext.1394B and 1+1 1394A Ports Card (FWB3414G) Single-lane ( x1) PCI Express throughput rates up to 2.5 Gbps. Supports data transfer rates of 100, 200, 400 and 800Mbps. Fully compliant with IEEE P1394b and backwards supports 1394a-2000 as well as 1394-1995 standards. Works with various types of 1394 devices including DV camcorders, hard disk drives, removable drives, CD-RWs, DVD-ROMs and other 1394 audio/video devices Support Microsoft Windows 2000, XP, Sever2003, Vista,7, Linux and MAC G5 operation system.