Um, it doesn't work like that. It's two 3.55GHZ cores that work together. Their clock speeds don't combine. If it did, it'd just be a super fast single core. I would work on expanding your knowledge on how dual core works.
ummm i wud not no if ther was i a difference as i have never had 2gig RAM! my last computer only had 512mb! and wen i upgraded i went the whole hog! so went straight 2 4gig!!
it's more memory than the computer can handle. It increases seek time a lot and throws errors like crazy because it's too much memory for the thing to handle. It is complete waste 100%.