Thx for the advice
I am running AIDA64 on my Logitech G19 screen which gives me realtime info about essential items (FPS is tested with FRAPS). So I had all three GPUs work at full load with the last beta patch. No stutter, smooth gameplay and temperature around 64 degrees Celsisus thx to watercooling. Now basically the whole is unplayable and I had to go back to previous full version (back to 32 FPS average with bomber intercept). And no I did not modify anything inside the Nvidia control panel...High quality everything else is standard.