While watching this YouTube video, I remembered that you've been having extreme CPU temperatures even at idle.
In case you have a watercooler, check if the pump works correctly. If not, I suggest to act accordingly (switch to a working cooler if it can't be fixed in an easy way).
[EDIT]
Regardless of cooler, check if the plastic cover has been removed from the cooler's cold plate, i.e. nothing but thermal paste should be between the cooler and the CPU.
[/EDIT]
Regards
Dalai