I would like to upgrade my current CPU. It's an Athlon XP 1600+ on an Abit KR7-A Raid board that runs at 266 FSB. I'm trying to find a faster CPU without overclocking. It seems all I can find are processors running at 333 FSB. I know I should be able to use one but it would run at a lower rating which, to me defeats the object of upgrading. Can anyone suggest how much processing power would be lost depending on which processor I choose. TIA