pretty much what most people said. i personally noticed a difference going 4gb to 8gb. ofcourse, i edit videos so i needed it. atm, i had to sell the 4gb since i needed the cash. very noticeable loss of smoothness. if you can justify the 8gb (video editing, cad, database) then go for it. if not, then just stick with 4gb, especially since ram now is getting quite expensive...