From this article: http://www.tomshardware.co.uk/forum/id-1800828/intel-temperature-guide.html?_ga=1.211563922.681378646.1489950621
I would agree 69-74c would be fine during heavy stress tests like aida, but not during gaming. I watched some YT videos and read some internet and ppl get like 55c max during gaming and 79 during heavy stress tests. I just hit 74c on one core during gaming(,but in other games never go above69).
I will also add that my cpu fan runs at 900rpm which is like 50% of its max speed.