GTX560 (384) at 825MHz will be between HD6870 and HD6950. At 950/1000MHz will be close to GTX570 performance but it could lose in DX-11 games.

Depending on the game, at 1000MHz it could be close or better even than 6950/70, take HAWX2, Lost Planet 2 and Civ V in DX-11.

I believe there will be two models, one at $199 (one SM disabled ??) and the second at $229/239(1G memory).