670FPS is awesome. Not done any DIVX encoding in a long time. I backed up my entire DVD collection a couple of years back.

Q9550's if you're lucky enough to get an E0 stepping should do around 3.6GHz on standard VID, and go up to maybe 4-4.3GHz. 4GHz is achievable under the magic 1.3625V. Heaven knows the kind of frame rates you'll get with DIVX encoding at 4GHz on a Quad. It'll definitely fly.