A friend is wanting to upgrade his cpu (Intel). He has a mobo (sorry unknown model at this stage) with a fsb 533 and an old P4 at 1.8 ghz. His board can take a chip up to 3.2 ghz however. But, the newer chips/boards are all 800 fsb right? so is it worth putting a newer P4 chip onto it, or better to upgrade both mobo and cpu at the same time?