I have P4 2.2c. I guest this isn't the fastest cpu, but still decent. But I feel it takes to much time to recompress from DVD movie ( DVD 9, I guess average is 7.5GB) to 4.36GB. It takes 25 mins with dvd2one. I'm planning to upgrade cpu, if the faster cpu can significantly decrease time. I heard P4 is better than AMD64 for video compressing. How long does it take with your guys' cpu? I wanna upgrade P4 northwood. Is there speed difference between northwood and prescott?