Thanks for the info, I thought as much.
At the moment I only have a 80mm on me and I did some tests.
I tried the (only case) fan on the side as an intake and my case seemed to get pretty hot,
both GPU and hard disks were around 10 degrees Celsius more. I am trying it as an exhaust on the side now.
Having only one 80mm what would you suggest is optimal of the four options :
side intake , side exhaust, back intake or back exhaust ?
Back exhaust - side exhaust messes up the airflow inside the case.