Thank you for suggestions, I don't have shadowplay installed so that should not be it. I also tried turning of the gsync and go all vsync, then it seems to stay at the low 75fps range and never bumped up to 100fps (all other settings the same). With the clock in mind I did an run for 3 laps, the fps is solid 100, but on an straight is goes down to 75 to then a bit later bump up to 100fps again. The 75fps moment is when the gpu load on both cards drops and clock for the 2nd card drops for a while. Is this normal? I'll monitor this with AC and AMS as well to see how it behaves, maybe update to the latest nvidia driver again (went back to an older to see if it helped). Hmm, but I can also notice this when the system is in "stand-by" I do have 2 monitors to the 2nd card and the main to the 1st card but still, strange difference?