Point of View GTX 570 TGT Ultra Charged @ Guru3D

"See, the default core clock frequency of the GTX 570 is 732 MHz, the TC version is clocked at a blistering 810 MHz, which is a pretty decent overclock. Memory wise spot an increased clock frequency on that 1.2 GB GDDR5 memory as well, taken from 3800 towards 3960 MHz."