The side of the case is never on. I never put it on anymore for the fact I'm too lazy to take it off if something needs done.

*Edit* After just under 10 mins of Blops online the temp was 65.
Thought the cases were designed for a proper airflow to cool it most efficiently? Therefore, try putting the side of the case
on and it should cool?
It chops and changes every few years, depending on the tides and the star signs.
I tend to be of the school of thought that a large gaping hole in the case tends to be fairly good at cooling, but as always just run a check... see which comes out best =]