I have always been under the impression that RAM should be the same in each dimm(ie.2x2 for 4GB or 1x2fo 2GB). I have been looking at new laptops with the intelI5 or I7 processor and there is always an option to upgrade from 4GB to 6GB. The 6Gb would be a 4gb and a 2gb ram card. Will not having equal amounts of ram in each dimm negate the beneifit of the dual core or quad core processors?