I finally got both cores to work! Switched back to 11.6 and installed Stream SDK 2.1 and now it seems to work. Although, the total speed constantly fluctuates between 400-700Mhash/s.. Shouldn't it be more stable? What could the problem be? Flags?

I'm using these flags at the moment:

-k phatk VECTORS BFI_INT FASTLOOP=FALSE AGGRESSION=7 worksize=128

Anything I should change? I've tried AGGRESSION=11, but for some reason I get a higher Mhash/s with 7?