it will work. Firewire costs more, but can save money in the long run. I have a usb2 case with my liteon 811, but can't hit 8x without a lot of burn proof. I'm now on my third external case for my hard drive, which is firewire at last with the oxford 911 chipset, because none of the usb cases gave read rates good enuff to burn from external HD to external DVD even at 4x. The firewire has a built in processor much like a graphics card and thus relieves MUCH system stress ( I used to get 100% usage burning from hd to dvd at 2x, and I have a P4 1.8 Mobile), and greatly increases data throughput (don't be fooled by the 480vs 400 Mbps). However, some ppl get good results with USB2 at 8x but I see far more problems than good results. Try and get a firewire card.