The other day I was in my BIOS and I noticed that my P4 said that it runs at a speed of 533Mhz and the front bus is rated at 533Mhz i guess. Well my 2x 512 memory I have in there say that it is only 333Mhz. Could this be why my PC still seems a little slow? At work my PC only has 1x 512 and it's pretty quick, but at home it's so slow that I actually watch my Start menu scroll up when I try to open it. I upgraded about a year ago from 256 to 1024 and honestly I don't see much of a diffrence, and now I'm wondering if I put in the wrong memory back then. Can anyone help?????? I'm confused! 