I don't allow mine to go over 55c, just to be on the safe side, although 60c is what most people say.
Same here ,I'm getting 54c at 100% and that has me looking for something other than stock cooler . I like a lot od wiggle room . Just can't find an easy to install small cooler .
They say 62c is max but cooler=longer life = better
I have 1100t with Raijintek Themis. I must say that cooler is fantastic. On prime95, after 15 minutes stress test it passed 9 iteration of test 1, and 7 iteration of test 2, CPU temp maxed out at 45C, while socket temp was 53C.