Ok, I'm having a slight issue, in my system there is 6gb of ddr3 1600 ram, but it is only reading 4gb, BUT, my graphics card, ati ax 5750 which is 1gb ddr5 is reading as 2gb?? Do I have the wrong driver? I have the catalyst control center and when i try run it the pop-up box says that i need .net framework 4, but when i tried to download it, it wouldn't let me, windows 7 ultimate 64 bit, please help me!!