Quote Originally Posted by icemanchilled View Post
So Nvidia stated, categorically, the average (and guaranteed) increase you can expect is 1058Mhz, GPU Boost is also limited to 1110Mhz on every card anyway, so no review cards went over that speed. Also the performance difference between the guaranteed Boost clocks (1058) and the maximum (1110) is less than 2%. Negligible.
Actually the difference should be more than 2%, as the theoretical difference is 4.9% and even at 1084 (2.4% theoretical) the average performance difference is already 1.5% according to hardware.fr's benches.

I use Afterburner, latest edition that has full support for the 680. Apparently, when the cards are under heavy load, they don't fluctuate the clocks at all, it finds a happy medium and sticks to it. Anands review gives a very good rundown of what's going on, pretty much matches up what's going on with mine, as far as i can tell anyway. As i've said before, heat plays a crucial role, if the GPU is over 70c it simply will not hit the maximum Boost of 1110, it scales the clocks according to load, heat and power consumption, although never dropping below 1006Mhz.
So people should use Afterburner to find where their card sits at then I suppose (oh, and it can drop under 1006MHz, too, for example at TPU had their press sample to drop under)