Many will say keep it below 70c with no more than 1.4v to 1.45v on air. As to the official Intel numbers then I'm not aware of them. I like to keep below 60c at full load as who knows how accurte the software programs are.
Michael
Keep coretemps under 80ish during stress testing.
60C is ridiculous IMO...no offense guys but it's not 2004 anymore with our old school AMD chips blowing up when they climb over 60
Intel rates the max tcase as 72C so the cores can get hotter than that.