Tommynew :
Wow i tried with the stock cooler.
Insta 86ºC, i think i wont let it run hotter xd.
PeppermintFangs :
Prolonged use at temperatures above 65c for the i7 4790k will cause long term damage. It's GPU's that can survive at temps up to 95c...
He said prolonged use above 65c, not during a stress test, your temps are fine, just don't stress test. You will not go above 65c during gaming.
There is really no need to stress test your system, as long as you can do everything you want without crashes you're fine.