Both of the cards are factory overclocked. The GTX460 with
763MHz instead of 720MHz, the GTX570 runs with 823MHz instead of 732MHz.
Image on the right side shows a stardard clocked GTX580 for comparison.
A nice result for the GTX570, as I had to pay just 70% of the GTX580 :-)
Sorry Nvidia, but the new Kepler GPU found on Geforce GTX680, is not a good performer for the price to pay:
It will be hard to utilize it and realize the 1.9 GFlops/s with help of it's 1536 slow running Cuda-cores.