That. Any FireWire PCIe card with a Texas Instruments chipset will work.
A FW800 to FW400 cable, however, should do the trick, too. That's not an adaptor. It's just that FW400 uses fewer lanes than FW800.
So far it works good and picked up my old FW400 drive right away. I knew I could buy an adapter or new cable, but I figured since the open PCIe bay is there I might as well use it and gain 3 FW400 ports. I still need to try out my old MIniDV camera.
On a side note, I think Apple should have still included at least one FW400 port on the Mac Pro, or at least included an adapter with the computer like they do with the keyboard extension cable. Many people still use FW400. I think they went a bit overkill on having four FW800 ports.
I have a sonnet card with three USB 2.0 ports and two FW400 ports. Had it running my MBox 2 Pro. Just pulled it from my system and don't need it. PM if interested.
The OP mentioned he needed dedicated bandwidth for one of his devices, hence an expansion card. A lot of pro audio gear is like that, actually. Also, I've dealt with older Canon video cameras that for whatever reason (I cannot explain) refuse to work on FW800 ports with adapters.
The OP mentioned he needed dedicated bandwidth for one of his devices, hence an expansion card. A lot of pro audio gear is like that, actually. Also, I've dealt with older Canon video cameras that for whatever reason (I cannot explain) refuse to work on FW800 ports with adapters.