Mines the same performance wise, although running hotter the same as yours. Major improvement on an 670 I tried on though, best previous was 230ish, now it's at 330-350! With above mentioned 14x14 conf, can't remember the previous one.
Any more details on this? I have the 14x14 config running on my 670, and am only at ~244, even with interactive mode disabled.
Full config is -H 1 -i 0 -m 1 -l K14x14 x64 exe, win 7, 331.93 drivers. I'm guessing you haven't overclocked your card either, that card boosts to 1280~1300mhz core, memory sits at around 3500mhz.
Ran it some more on my 580 too, heat is way crazy now, performance is the same as 12-10 build, but where it stopped at around 76C there, it now goes up to 84 and beyond :/ Worse than furmark haha. Cooled with an accelero xtreme II at 100%, so a 10C increase is quite a lot.