Don't forget, ambient room temps play a large part in the cooling of a PC. If the fans are sucking in hot air, the temps will be high and so on
The best use for Prime95 is to run Small FFT. This runs your CPU at the max it will go, and give you the highest temps. It's what i used for checking if my CPU was stable after overclocking and to see the max temps. I then ran Blend to check everything else was ok
Technically speaking, your CPU can go up to 105c before throttling (I have the same CPU)