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..

Tech Nibble.