here is a simple question. i have 2 procesors for my laptop. currently my dell inspiron is sporting a 1.8/512 p4 with a gig of ram. is switching to a newer but slightly slower 1.7 with a 2 gig l2 cache a smart thing to do if its free since i got the cpu from a broken laptop for free. everything fits and is tested. question is will there be a difference in performance. im using the laptop as a photo editing/ music playing, work computer that traks me on the road with gps integrated into it. im a truck driver. battery life is of no concearn, mostly powered threw a car jack. any sugestions?