Civ 5 can stress your systen more than Prime95
I have just finished building another PC so I ran Prime95 on it for a quick run. No problem there the CPU cores settled down to running at between 62C to 66C. Then I spent an hour maybe 2 playing Civ 5 no problem there. When I exited the game I saw that the CPU had run between 66C to 70C max on the cores.
I think this is down to the GPUs producing a lot of heat.
My point is what is the use of doing an overclock on a CPU then stress testing it on Prime95. Then in the real world finding out that your CPU could get a lot hotter when the entire systen is being used.
I am not too worried about the above because the temps never reached too high a level but I did find it amusing that Civ5 heated my CPU up more than Prime95.
Interesting in a practical sense but perhaps your logic is a bit flawed. Civ V is not heating up your CPU, its causing your GPU to operate at high temperatures which increases the temperature inside your case perhaps because you have insufficent air flow/case cooling for this situation which then results in your CPU being in a warmer environment so its own cooling has to work harder or is less efficient so then it gets hotter.
Originally Posted by Kaapstad
Not the same as Prime95 stessing your CPU and memory. The fix for the Civ V issue is better control of your case temperature, maybe by better GPU cooling or more bigger or more case fansa with more airflow, and not by better CPU cooling as other components like memory will also be impacted by higher case temps. The fix for a Prime95 overheat is reducing the amount of OCing or better CPU cooling. Just not the cause and effect you are suggesting.