Right, so when I RMA'd my ram they accidently sent me 2 packs of identical ram instead of 1 pack, I thought this was odd and I used the "Dodgy" pack of ram, (The other pack is still factory sealed), No problems at all, no BSOD, quick question, since I have the 2 packs, 2x4Gb, Corsair Vengeance ram and a ASUS Maximus V Formula, is it possible to use both packs in the 2 sets of dim slots?