Case Fan Setup Question

[DrumsXO]

Hey, everyone.

I have a question about the ideal fan setup for my system.

Case: Cooler Master HAF 922 ATX Mid
CPU: i7-7700K OC'd to 4.8GHz via MSI OC Genie
CPU Cooler: Corsair H100i V2
GPU: EVGA GTX 1070 SC
RAM: Corsair Vengeance 3000MHz DDR4 OC'd to 3200MHz via MSI OC Genie

My current fan setup is as follows.

Bottom: 140mm exhaust
Front: 200mm intake
Radiator (top): intake
Rear: 120mm exhaust
Side: 200mm exhaust

A few friends have suggested I rearrange them to the following.

Bottom: intake
Front: intake
Radiator (top): exhaust
Rear: exhaust
Side: intake

Wouldn't that give me positive pressure? I read that negative is best for cooling. That said, I know that due to the laws of convection, it makes more sense to have the radiator exhaust out the top, since heat rises. Having the radiator fans pull air in just sucks heated air into the case (it gets heated by the radiator, pump and hoses). I hadn't thought of this when I installed it.

This stuff confuses me!

 

[scout_03]

follow your friend advice .

 

[DrumsXO]

follow your friend advice .

Out of curiosity, what makes you say that? Is it that it's the proper way to set the fans up, or just because they're my friends, I should agree with them?

 

[smorizio]

heat flow up so you want to pull cold air from bottom of case and shoot the hot air out the top.

 

[DrumsXO]

heat flow up so you want to pull cold air from bottom of case and shoot the hot air out the top.

Yep. I mentioned in my post that I hadn't thought about that when I installed the radiator and configured my fans. It makes sense though, since the laws of convection state that heat rises.

I'm just looking to see if people agree with the proposed fan setup.

 

[DrumsXO]

I've successfully made the changes!

Bottom: intake
Front: intake
Radiator (top): exhaust
Rear: exhaust
Side: intake

This technically gives me Positive Pressure, I think; I've read that Negative Pressure is what you want. Or is it still Negative Pressure since there are TWO fans on the radiator?

 

[Sedivy]

You want slight positive pressure so you don't get a lot of dust in case. If you've got 3 fans on intake and 3 fans on exhaust (since 2 fans on the radiator), you're pretty much balanced. Speed of individual fans will determine if you're overall on a positive or negative side.

 

[DrumsXO]

You want slight positive pressure so you don't get a lot of dust in case. If you've got 3 fans on intake and 3 fans on exhaust (since 2 fans on the radiator), you're pretty much balanced. Speed of individual fans will determine if you're overall on a positive or negative side.

It's so weird how Positive Pressure prevents dust... Like, you'd think that having more air coming IN would lead to dust, since the air would bring the dust in with it, lol.

 

[Sedivy]

No, the idea is that on intake fan positions, you've got filters built into the case that filter the dust out somewhat. If you've got negative pressure, then more air is squeezed out then taken into the case through the intake. In which case to make up for the difference, the air enters the case through the back and side openings as well, where there are no filters, bringing dust with it inside.