IRQ Confilct?

Hey all, you may or may not know, but I just made the switch from a Radeon 9800 Pro to an nVidia GeForce 6800 GT and since then, it seems my USB devices don't want to work when all of them are plugged in. I checked the IRQ list in the system information and is says that both my video card and an IEEE 1394 host controller are on IRQ 16 and I was wondering if this might be a problem? I thought IEEE 1394 was Firewire, and if it is, I don't have anything Firewire on my computer. My motherboard has the ability to have a Firewire port to be hooked up, but I never hooked it up as I never use Firewire anything, so I didn't think that would ever be a problem. That is the only thing I thought of, so any help would be appreciated.
Thanks.
Thanks.
