ok, just to clarify, I am by no means a computer expert, with that, i have, im sure, an easy question for u guys, i have an old POS home computer, and just installed windows2000, and i want and need to upgrade my RAM, but ive searched online and it confuses me on which to buy, and what size limits i have to pick that can be installed on THIS computer, as it stands, its only a 533mhz, with 64 mb of ram, if im not mistaken, can i not upgrade it anymore then 128???? for this paticular computer, it seems to be that way, its a HP Pavillion 6635...please advise me on how big this computer will take, and the best(cheapest) place to get it, i will really appreciate it, thanks guys!!