hey guys so i used my old dell ram in my new set up its 333 mhz speed 512 module just today i recieved my other one in the mail cuz i wanted 1 gig so i just bought the same exact one i got from dell... the thing is i think i wanna get one more gig or another 512 but the dell ram i got cost me 90 bucks... for 512! my friend tells me thats a rip off... can i get cheaper or do i need to match them??