I have in my pc two sticks of 2gb ddr3 and two sticks of 2*2gb ram. My nvidia geforce has my rig and it says that i have 8gb installed but i have 12 installed. This is not a problem that Windows is taking it for itself it's the double ram sticks 2* (2*2GB). I don't really care but having 12GB is better than 8GB. It means i don't have two replace four sticks of ram when upgrading only two.