Mr5oh has a valid point. There is no risk in essence of something magically destroying your pc in one click, however if your heatsink is not seated properly or your overclock is not good it will warm up your CPU quite a bit and thus give you input on max temperatures so you can adjust accordingly. There is of course much more to it than that but no need to worry much about it, you can monitor your real-world CPU temps in real-time without stress testing with tools like HWMonitor.