Im not buying a new GPU yet, but im just very curious.
GTX690 (any version) vs PowerColor Radeon HD 7990 6GB DEVIL 13.
I read a bit about the 7990 card and i thought it would beat the Sh** out of any card available atm, but the site i usually buy my components from is getting a 7990 card in stock in about 2 weeks and the price match the GTX690 cards (exept for EVGA's Hydro Copper Signature wich is about $300 more than the 7990).
^I think you're right... judging from everything that I've heard/read, the 7990 is just a hair faster than the GTX690, but sucks quite a bit more energy and is quite a bit less efficient. I don't think it's double the wattage, but it's a significant amount.
If power usage and efficiency aren't issues for you, then the 7990 is marginally faster; if they are, though, the 690 is a better choice.