You can just run Open Hardware Monitor and minimize it to the tray before you start the stress test and after you just open it up again and check the CPU Package and GPU Core min and max.
So I ran it now and after 5min35sec it stopped becuase one of the CPU cores hit 87deg (it seems 85deg is a safety point for the programme).
Chrcking on Hardware Monitor, CPU Package Max = 84 degrees and GPU Core Max = 73 degrees - is that good or not?