4 fans pull 1 fan push? Good idea, or no?

Chubz7869 · February 3, 2017

Hi there, I need some help... I'm trying to build a new computer for general stuff and obv gaming, however I purchased 3x corsair rgb ML140 pro magnetic fans for 2 to go on the front of my corsair 750d airflow full tower, whilst the other 1 would go on the back to create a push/pull fan configuration...

The problem is I would also like to purchase and install corsair h115i liquid aio cooler 280mm (140mm x 2) and that would go on the top of the case.

My question, is having 4 fans pulling air into the case and 1 fan push air out of the case bad for the: 1. Components, 2. Air flow, 3. Negative, positive neutral etc...

Really need the communities help! Thanks in advance...

HemiPhenom955 · February 3, 2017

This config would create a Positive pressure case,, in nature this is preferred.

As long as the 4 intakes have filters,, you may never have to blow out the inside of your case.

KE2012 · February 3, 2017

Alrighty,

1. Not really, no. Having 4 fans in and 1 out will stop the air from being stagnant, and allow heat to disperse from passively cooled components such as RAM and SSD's.

2.Airflow, its not ideal. The ideal set-up is in most people's opinions a tad on the positive side so dust is blown out of all the holes in your case, instead of sucked in. Having 4 in and only 1 out is certainly going to create some positive preassure, but it may not let the hot air out as well as some may like. If it was me I would try and have 2 or 3 out to compensate your 4 in. (Or set to 3 in, 2 out)

3. You're going to have positive pressure alright, as already stated, this is not a bad thing in moderation.

DailyProcrastinator · February 3, 2017

33 minutes ago, Chubz7869 said:

Hi there, I need some help... I'm trying to build a new computer for general stuff and obv gaming, however I purchased 3x corsair rgb ML140 pro magnetic fans for 2 to go on the front of my corsair 750d airflow full tower, whilst the other 1 would go on the back to create a push/pull fan configuration...

The problem is I would also like to purchase and install corsair h115i liquid aio cooler 280mm (140mm x 2) and that would go on the top of the case.

My question, is having 4 fans pulling air into the case and 1 fan push air out of the case bad for the: 1. Components, 2. Air flow, 3. Negative, positive neutral etc...

Really need the communities help! Thanks in advance...

I think being a bit more balanced is better, I'll use two of my builds as an example and maybe it'll help you. (Also great choice with the ML fans I love mine)

So this is my ATX system, the front two fans are both 140mm and are intake fans, the bottom one is 120mm and is also intake. The two top fans are 120mm and are exhaust for my radiator, the rear fan is a 120mm and is also exhaust.

And here is my ITX system. You can't see it but there is a 200mm fan at the front for intake. And then a Hyper 212 cooling my CPU with two 140mm fans at for exhaust, one at the top and one at the back. I do plan on switching the front 200mm fan for two 140mm fans as well, to get even better air flow.

But remember if you have one more fan for exhaust or intake you can always use fan control software to use certain fans work a little harder. Positive pressure is always better than negative but shoot for being more balanced or just a bit to the positive side. This helps with dust control also as already recommended having fan filters on intake fans is very smart. If you have more questions feel free to ask.