Question All intake vs all exhaust?

[Lewis19]

Hypothetically, what would be better when it comes to keeping your computer COOL? All fans being intake? Or all being exhaust?
(yes i understand this shouldnt be the case)

 

[jeremyj_83]

All intake as it will be positive pressure. Positive pressure will force air out through any space possible and reduce dust build up. Also positive pressure will help prevent hot expelled air from being recycled back into the case, which can happen with negative pressure. https://www.silverstonetek.com/techtalk_cont.php?tid=wh_positive&area=usa

 

[USAFRet]

Hypothetically, what would be better when it comes to keeping your computer COOL? All fans being intake? Or all being exhaust?
(yes i understand this shouldnt be the case)

Neither.
Some IN, some OUT.

 

[jeremyj_83]

Neither.
Some IN, some OUT.

That is the best answer.

 

[USAFRet]

And for the hypothetical question - That can't be determined in isolation.
Some collection of parts may work better one way, another collection of parts may work better the other way.

But neither all IN or all OUT are optimal.