Exhaust Fan

Loxa · 5 May 2021 at 11:09

A bit of random question but i was wondering about this the other day, is it better to have a exhaust fan or fans spinning faster or slower than intake fans? (lets say with a positive pressure fan setup)

Loxa · 5 May 2021 at 11:28

mickyflinn said:
Depends on fan ratio if you have the same amount of intake to exhust then slower exhaust fans would give a slightly positive airflow.

A setup with 4 intake and 1 exhaust & a setup with 6 intake 1 exhaust.

Loxa · 5 May 2021 at 11:47

mickyflinn said:
You would get better airflow with another exhaust in each but if you cant then increasing the exhaust speed can only help.

Noise is a factor increasing fan speed.

Ok interesting, always wondered about exhaust rpm. Something that seems overlooked a lot.

Loxa · 25 May 2021 at 15:10

mickyflinn said:
Maybe because most people would have another exhaust fan or an aio cooler exhausting air.

Sure you want postive air pressure but also movement of air in and out the case so the faster you can expell hot air the cooler the system.

Changed my fan setup from a 6 intake / 1 exhaust to 6 intake / 4 exhaust and my cpu temp dropped 15c and motherboard temps/m.2 dropped 30c.

Loxa · 25 Jun 2021 at 20:30

Quick follow up, temps have been all good since the change but was just wondering if having faster intake than exhaust is better or all runnning the same speed is fine. If it will make no difference to thermals then i will lower the fan speed slighty (from 50% to 40%) to lower noise levels.

6 intake / 4 exhaust