Case Cooling - The Physics of Good Airflow
 

Keeping a computer running coolly isn’t just about placing a giant
heatsink on the hotspot - although it undoubtedly helps. Just shifting
the same stale air around isn’t going to help keep the components cool,
in fact, it’ll only heat them up. So, aside from on-site planning, you
need a bit of global planning as well to insure you have a cool computer
case. After all, you have a CPU, a GPU and a power supply to cool in
there.