Hi, I bought a pair of 2gig RAMs. I read a lot about it and googled it as well, it helps me under how it works but I still can not get all 4gigs to work. I have a motherboard that supports 8gig, A cpu that has DEP enabled (PAE enable), enabled memory mapping (BIOS see all 4 gigs). I also tried the /PAE in boot.ini it does not work. I know that two gigs is reserved for apps and another 2 is reserved for windows. I am sure there's someway to make windows use all those 4gig RAMS. Please help me thanks