Actually, this is for my friend who is too lazy to research himself so i decided to help him out lol. Anyway, he was going to make a new build soon but then heard that AMD would be releasing their 8000 series cards q1 2013 which is not far off at all. He wanted to know whether sli-ing two 4gb ftw edition 670's would last a long time and whether he should just buy them now or wait the coulpe months until amd supposedly is releasing next gen cards which would obviously be better and last longer.