I've got 2 thermometers that were used in a medical laboratory for fridges. Both can monitor 2 different temperatures: inside and outside. I've placed both on the top of the case just to be sure they are equally accurate. One of the wire sensors are inside the case hanged from the top to between the front intake and the CPU cooler. The other one is right at the rear exhaust.
Ambient temperature is 26 °C.
Prime95 ran for around 30 minutes.
Max core and package temperature was 83 °C on average, 85 °C max.
The measurements were performed with case closed and fans on auto.
Inside the case (between intake and CPU cooler) temperature is about 1 °C higher then the ambient: 26.7 °C. I find this either extremely good or really odd (seems too good to be true but maybe I have really good airflow).
Exhausted air temperature is 33 °C which I find really low. 50 °C difference between CPU package and exhaust makes me question if the cooler is transferring heat away efficiently.
Here are some pictures in case I wasn't completely clear (In temperature is ambient, Out is case or exhaust temperature):
Do you think these temperatures are perfectly fine or something is suspicious?