Certainly 62C is quite mild, and darnright cool for all-core 5 GHz! However, I'm not familiar with the degree of stress imnosed on the actual CPU relative to other stress testing apps (AIDA64, Prime95, Intel XTU)
Try Intel's Extreme Tuning Utility...
https://downloadcenter.intel.com/download/24075/Intel-Extreme-Tuning-Utility-Intel-XTU-
The included CPU stress test within generates CPU loads that rival Prime95/small FFT, at least that's my experience with my 7700K (MCE on/all core 4.5 GHz, 24 C ambient) , with temps of 74C or so...