nVidia Kepler GK106, aka GTX680, will be supported in r300 drivers, v300.99 beta seem to be out in the wild already.
Quite a beast the GTX680, for a card that was supposed to be a mid-range/performance card, suddently turned into a high-end HD7970 killer. Sorry AMD fans, this seems to be the case. Hope this doesn't start a AMD/nVidia hate war but this time around nVidia seems to b getting the crown. Let's wait for the end of the month and see.
This card seems to be almost perfect, this was supposed to be the GTX660Ti, which was on my wish list. Only now being GTX680 instead the price will go up for sure.
It seems the bigger Kepler GK110 wil be waiting for 700 series, not sure though.
GTX690 will probably be 2x GK106.
A system with a i7-3770K and Z77 board (Intel Extreme?!) and one of these GTX680 would be awesome.
If IVB-E comes by Q3 or Q4 2012 and X79 gets a refresh (X89?!) with USB 3.0, full SATA 6G/SAS and maybe Thunderbolt (optic next year, confirmed by Intel), PCI ditched and everything else well teaked, that will be worth the wait.