Im planing to buy crossfired 7990s but i think the 8990 is gonna be released soon and i think it would be better to wait for this.
If anybody knows when, it will be good to share the date with us
P.S. just the year if possible
Considering the 7990 was just released, I'd doubt AMD would rush to get an 8990/9990 on the market anytime soon. If you have the budget for something like that you should either wait for the 8000/9000 series, or get a dual GPU solution from either AMD or Nvidia, Crossfire is kind of messed up right now, though a driver supposed to be released soon. If I were you and I had the money for a 7990, I'd either get a 7990 (though they run very hot, but you do get 8 games with it, which is a plus), or I'd most likely get two 770's in SLI or even a single 780 would be strong enough.
I didn't even realize he said crossfired 7990's, I must've been reading too fast, yeah two 7990's in a single system is a TERRIBLE idea unless you have a crazy good water cooling config, check out this article about what happened when Tom's tried to CF 7990's: http://www.tomshardware.com/reviews/radeon-hd-7990-cros...