Clear Sky with all max settings including 4x AA
GTX570
Min, Max, Avg
10, 27, 17.151
GTX670
Min, Max, Avg
16, 39, 24.868
ok I saved the one anomaly for last. I have no idea what is going on here in Clear Sky as my gpu was ramping up fine so it must be a driver issue. it seems odd that on full max settings it was faster than GTX570 but on reduced settings it was slower than the GTX570.
Clear Sky with max settings except sun quality, sun rays and SSAO lowered to medium but still 4x AA
GTX570
Min, Max, Avg
30, 60, 43.405
GTX670
Min, Max, Avg
22, 46, 31.576 (WTF?)
EDIT:
after a forced reboot from a blue screen during testing of Clear Sky the game now runs like it should so go figure.
GTX670
Min, Max, Avg
61, 117, 78.764