At that note, thanks Silvune.
I was originally going to buy a 6970 then thought a 6990 but I knew a 6990 would probably kill my machine if I superclocked it with the little tab thing. Then I thought I'd get 2 6870's because I can almost get double the power for 2 cards instead of a 6970. And seeing as how those 6870's have 2 gig vram. pretty much get the power of almost a 6990, but not close at all.
Edited new to knew.