system
A chat on subreddit /r/pcmasterrace
human
There are a lot of comments that focus on "hot air rising", that concept is entirely irrelevant when you have several fans. Air rises due to pressure differences, if you have fans that are forcibly changing the pressure difference, the pressure difference between the hot and cold air is irrelevant. Conduction overwhelms heat transfer through convection currents.

PC cases of this style are designed to cool through volume of air being pushed through it. Air in at the front/bottom, air out at the back/top.
gpt
At least one person has it right in this thread.  Damn