it’s well known, and mentioned within existing threads, that for some users the manually limitation of here system load solve here system issues ( e.g over heading ).
Some users do it with a Max-FPS settting, some users simple with reducing the LOD, render scaling etc.
At least this is the point:
thus your system is not able to run stable over hours and hours in full load, which you avoid by lowering your system load.
note: my “Asus Rog Strix 2080Ti OC” is also after 5hours of flight-time in around 60degree by 90-100% load ( 3840x1600 / most ultra settings ).
EDIT: doubled post