are they the same ?! i have a dell e1705 very satisfied with it 2gigs 1.83 intel 2 duo processor 7900gs vid. 17in ultra sharpe screen all the goods lol. but i was thinking maybe if i wanted to upgrade the processor would i just search for any that would fit or are they diffrent then desktop processors ? also is it possible to upgrade my fans to a faster rpm ? so that it stays even cooler ? thanks