If i see my cores go above 90c in stress testing then i turn the test off and go back to the drawing board...This for me has been an issue with my 4.0Ghz profile as i cannot for the life of me keep the cores below 90c
Under stress testing, imo anything below 85c on the cores is fine. keep your eye on the VREG as this too needs to be below 85c. If you find the vreg does get too hot try lowering the PWM.
Heres my results after 10mins of prime small fft's at 3.6Ghz, still working on the 4.0Ghz profile (i think a HSf reseat might be in order).