[SOLVED] How Do I Make a Perfect Intake & Outlet System With Four Fans

[Ya_SG]

I have a cabinet (Corsair SPEC-5) that comes with 2 fan mounts at the front, 2 fan mounts at the top and another mount at the rear.

In aggregate, it has five 120mm fan mounts. The cabinet itself comes with a fan pre-installed at the front. One fan would never be enough, so I bought another three.

Now, I have four fans in total. Where and in which position should I place them for the best intake and exhaust system?

 

[SkyNetRising]

Better option would be using 2x 140mm fans at front position.

But if you already have 4x 120mm fans, then optimal config would be:
2x 120mm fans in front (intake),
1x 120mm fan in back (exhaust),
1x 120mm fan in top (exhaust).

Alternative config (also ok):
3x 120mm fans in front (intake),
1x 120mm fan in back (exhaust).

 

[Ya_SG]

Better option would be using 2x 140mm fans at front position.

But if you already have 4x 120mm fans, then optimal config would be:
2x 120mm fans in front (intake),
1x 120mm fan in back (exhaust),
1x 120mm fan in top (exhaust).

Alternative config (also ok):
3x 120mm fans in front (intake),
1x 120mm fan in back (exhaust).

All of them are of 120mm and I don’t have more than two filters. As you know, dust and dirt will go inside through the intakes, so I would prefer your first one.

 

[truegenius]

as that case is very restricted in airflow, it is more looks oriented than cooling.
So for cooling performance wise try negative pressure by setting up 2 on top as exhaust + 1 on rear as exhaust ( no need for 4th fan ) and compare it to other way to find which works better.