Push Pull Configuration Kraken X31

sweols · 3 Mar 2015 at 22:07

Hello,

I have the following fans,
Corsair SP120 & NZXT FX V2 120

Which fan should I have as push fan, and then of course pull?

Does it matter, if one is faster than the other?

R-TYPE · 3 Mar 2015 at 23:58

Was wondering exactly the same: does it matter if the push fans are different models to the pull fans, even if rated to the same speed, 1500 in my case?

andybird123 · 4 Mar 2015 at 00:03

I would have thought you should match fans on push pull or they'll be fighting against each other with mismatched flow rates

If you are going to mismatch them then no it doesnt really matter which way round you have them, one will be causing a blockage for the other

Speed is irrelevant, it is flow rate at that speed that is important

Try it with one fan, then both, see if you actually get any improvement

Disco_P · 4 Mar 2015 at 00:08

Why not just try it.

Use something like IBT to stress and look at temps in HWMonitor.

sweols · 4 Mar 2015 at 07:36

It would make sense to use a higher static fan, as a push configuration.
Would you neccessarily need highstatic as pulling?

There's about 4-5CFM difference between Corsair SP120 and SP120 PWM

ubersonic · 4 Mar 2015 at 08:48

Doesn't matter if they are matched, or which one is in push/pull. You are running the fans in series (as opposed to parallel when they are side by side) which means that their static pressure will be basically combined, this increasing airflow if the is heavy restriction (which the usually is on the type of rads where push/pull is beneficial).

Worth noting that push/pull doesn't technically* increase airflow just pressure, if you use two 40CFM fans you won't get more than 40CFM.

*While their airflow output won't increase their airflow through a rad may as their pressure will have been basically combined to power the air through resistance.