For office pc on PCI Express 1x port Allows you to add 3 Firewire 400 ports to your desktop PC. Compatibility: Compatible with all Windows versions: 2000/XP/Vista/Seven/8/10/11 ... Features : CHIPSET VIA VT6308 and ASM1083. For PCI Express 1X ports (1.0A). IEEE1394-1995 compatible, 1394A-2000 and OHCI 1.1. Transfer speed up to 400 Mbps. 2 external ports 6 points + 1 external 4 -point port. Card powered by the PCIe connector, does not require power recovery. Card sold mounted with a high profile square, and supplied with an additional low profile type square.