Positive or Negative pressure in Noctis 450

Tmas_

Prominent
May 24, 2017
44
0
540
In my Noctis 450 I have a top mounted rad and an open air GPU, (Which I hear is a bad combo, and can give high temps on the CPU) I have the three included 120mm fans on the front and the 1 140mm fan on the back. I get a lot dust in my pc so I was hoping to get at least neutral air pressure which would slow down the dust. My temps are about 15c over my ambient and I have an H100i v2 with stock fans. I might buy 4x silent wings so I can have every fan slot filled, but I was thinking that I would put 1x silent wing fan on the front with my 240mm rad which I would give NF-F12's. I would then have 3x silent wings as exhaust, or should I leave certain fans slots empty to give good pressure?

So my real question is, should I leave all my top fan slots empty and just have the 1x silent wing and the rad on the front with a 140mm exhaust on the back? Or, should I mix and match slots? What I was thinking is to have the intake I just listed, one silent wing fan in the furthest front spot which would land right beside the rad, which would act like a push-pull setup, one 140mm silent wing exhaust, and no other fans? OR, should I have the intake I listed and then fill every other fan slot with silent wings?
 
Solution

TBombadil

Prominent
Jun 22, 2017
19
0
520
I recommend you a negative pressure balance (for getting the lowest temps) with top fans as exhaust, rear fan as exhaust and front fans as intake. For preventing dust use or buy some chassis bracket which removes dust by 80% and completely clean your PC once a month with a compressed air cleaner.

For getting neutral pressure: If all your case fans are 4-pin Voltage/PWM controlled try to run the intake fans at higher RPM than the rear and top fans, you need to take into account that the front dust filter reduce ~1/3 your intake air flow so even with the same number of fans as intake/exhaust you will get a negative pressure balance (at least an slightly negative one) when you add some top case fan or the radiator with its fans set as exhaust.
 

Tmas_

Prominent
May 24, 2017
44
0
540

So should I have 3x 120mm fans on the front with my rad, 3x 120mm on the top and one 140mm exhaust? And what do you mean by the chassis brackets? I have all of them installed except for my GPU which takes up 2. And what type of bracket would I want?

 

TBombadil

Prominent
Jun 22, 2017
19
0
520

Here is the case cooling setup I'd recommend you:

  • Front Intake: 3 x 120 mm
    Rear Exhaust: 1 x 140 mm
    Top Exhaust (back to front): 1 x 120 mm + 2 x 120 mm H100i v2

Well I'm talking about a Case or Computer Stand, Trolley, Base holders... (some with wheels like this: http://www.ebay.es/itm/Soporte-para-Torre-de-Ordenador-CPU-PC-VARIOS-COLORES-RUEDAS-GIRATORIAS/222548101824?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649) which are good for ground / floor clearance and reducing dust.
 
Solution