I have completely removed all Nvidia related and reinstall fresh… it kinds of behaves the same way and it has something to do with the lightning… when I started It was completely dark, now when I returned, the sun started to come upp so I got better gpu usage and frames, as the light progressed on the ground the gpu ramped upp even more, I took off and as soo. as I BROKE THE CLOUDS I GOT 99-100% of cpu usage… but before I hade the same Frames and GPU usage no matter what.