OK----yes I am a newbie with computers but I learn fast....promise! I want to ditch the celeron for a P4 but confusion is setting in. (See my other post) I know I need 533 fsb but when it comes to L2 cache I am confused about the 1024kb or 512 or 256? Does this info matter? If I'm not mistaken the celeron has 256 L2, would theh larger 512 or 1024 work. And what is prescott versus northwood?