Tax6132 :
elbert :
Safe temps are under 72~80c and about 1.38v max. I suggest keeping it under 70c and 1.35v if possible.
The highest ive gotten on my CPU that ive seen was 56C under heavy load after recently replacing thermal paste, What would you recommend a good starting overclock?
You do have some headroom and maybe you can achieve 4.4GHz starting at 1.25V on the core. If its not stable then raise the core voltage up .01V at a time till stable. Do not go above 1.38V.
Don't bump the frequency up in one hit, go from base clock 3.6GHz to 4.0Ghz to 4.2GHz then try 4.4GHz. Stress Test at each phase and save profiles if you can at each stage.
The OC you can achieve will depend on the Quality of your chip and your core temperature. So monitor them well.