this is not about physical destroyed. The hardware has protection for that of course.
Originally Posted by dibal
When those protections trigger, they trigger hard, and performance suffers a LOT.
This is about avoiding the hardware triggers, by sacrificing a little bit of performance once things get hot... to avoid the much more severe performance impact of having hardware triggers.
In addition, this allows setting the temperature below the point where the fan would come on (if the user so wishes) so that you can run silent etc etc.