I've noticed that the game damn nearly fries my CPUs (12 x i7-8700K). It seems to be really heavy on the processors on maximum settings in general. Especially grass and shadow details seem to be problematic.

Fans are on 100% and cover is removed of course.

However I seemed to have resolved the issue by reducing the maximum processor state to 95% in the advanced power options (win 10 64).

If you play on max settings, I suggest you better download a tool to watch your CPU temperature, like HWiNFO.