Decided on a budget build consisting of a amd a10-7800 apu and 8 gig dual channel amd ram and a asus a55-bm-e motherboard with windows 7 x64,windows shows 8 gig ram with 3.44 usable? As I've come to understand the gpu is taking ram for itself so I went in to bios and set it to 512 for the gpu and managed to get the ram to 3.7 usable, is it taking over 4 gig itself? I even tried my mates 16 gig dual ram and it showed 16 gig with 6 usable, I'm really confused as to what is going on as surely it's taking too much or is this normal?