I am doing a lots of video encoding avi to dvd. I am using a Q6600 at 3ghz atm with a normal 8800gts 320mb card. I just read up that ati allow video encoding cpu with gpu with 4870 card, but i don't know how more faster is it. My average encoding time is 15-20min with my proc. Would getting a i920 would be better over a 4870.