this 3 Port Pci Express Firewire Adapter Card Can Be Installed In A Pci Express Slot To Add Two Ieee1394b (firewire 800 - 9 Pin) Ports And One Ieee1394a (firewire 400 - 6 Pin) Port, Providing Broad Compatibility With A Wide Range Of Firewire Devices (e.g. Dv Camcorders, External Hard Drives, Digital Cameras, Etc.). The 2b, 1a Card Features A Native (single Chip) Pci Express Chipset - Resulting In Faster, More Reliable And Cost Effective Performance Than Expansion Cards That Utilize A bridge Chip.