Hm, I dont have a gaming mouse. Anyways, I played around with a fresh install of ubuntu and without having the nvidia drivers installed CPU-load seems to be fine (all cores between 10% and 40% viewing the space center, flying small things...), although the game is slow due to the weak intel graphics. To test, i installed the nvidia drivers with nvidia-prime: Game runs faster now but the high CPU loads are back (At least one core constantly >70%, fan speeds go to max... and that only viewing the space center). So there definitely seems to be an issue with the nvidia drivers, and its not PPFX. :/ I hope 1.0.3 will be fine.