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Positive Pressure Setup

post #1 of 29
Thread Starter 
Hello everyone.

I got the Arc Midi and NH-D14 not to long ago and I wanted to know if this fan setup would be ideal:



Do you guys recommend me putting a fan in the top rear? Would it yield better temperatures?

Thanks.
post #2 of 29
Yes and I would add one to the side so you have more air in than out resulting in more positive pressure. If dust is a concern you may also want to get a filter for the side.
post #3 of 29
Thread Starter 
Quote:
Originally Posted by absoluteloki89 View Post

Yes and I would add one to the side so you have more air in than out resulting in more positive pressure. If dust is a concern you may also want to get a filter for the side.
Thank you for replying.

I actually will have a window side panel, so I won't be able to mount anything. Maybe I should rethink my setup again?
post #4 of 29
You could just set the front fans to higher RPM than the back fans or not add a top fan so you will still have positive pressure with slightly reduced airflow.
post #5 of 29
I read somewhere that you don't want too have more air coming in that your exhaust fans can't get out fast enough as the cool air coming in will soon be hot air just sitting in your case. I have 2 120mm intake, 1 120mm rear exhaust, and 2 140mm top exhaust and my system has nice temps and i have 2 GTX 580 graphics card in sli that run pretty warm.
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post #6 of 29
Quote:
Originally Posted by jlhawn View Post

I read somewhere that you don't want too have more air coming in that your exhaust fans can't get out fast enough as the cool air coming in will soon be hot air just sitting in your case. I have 2 120mm intake, 1 120mm rear exhaust, and 2 140mm top exhaust and my system has nice temps and i have 2 GTX 580 graphics card in sli that run pretty warm.

Having more exhaust than intake causes dust to build up inside your case quicker, I advise to have more intake than exhaust for positive pressure, just run the front fans at a higher speed.
post #7 of 29
Quote:
Originally Posted by jlhawn View Post

I read somewhere that you don't want too have more air coming in that your exhaust fans can't get out fast enough as the cool air coming in will soon be hot air just sitting in your case. I have 2 120mm intake, 1 120mm rear exhaust, and 2 140mm top exhaust and my system has nice temps and i have 2 GTX 580 graphics card in sli that run pretty warm.
That is true unless you want positive pressure. Your setup has negative pressure which will move the air through faster but will build up more dust.
post #8 of 29
Quote:
Originally Posted by fishymamba View Post

Having more exhaust than intake causes dust to build up inside your case quicker, I advise to have more intake than exhaust for positive pressure, just run the front fans at a higher speed.

it's just an article i read, and i have intake filters that came in my case for intake front and for psu.
thanks for the info though as i did not know about it causing more dust.biggrin.gif
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post #9 of 29
Quote:
Originally Posted by absoluteloki89 View Post

That is true unless you want positive pressure. Your setup has negative pressure which will move the air through faster but will build up more dust.

and god knows i need lots of air moving through with those hot 580's. my case came with filters. (Corsair C70)
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post #10 of 29
Use 2x front fans and 1x bottom fan intake. 1back fan exhaust and let the remaining air flow out top vent and anywhere else it likes. I know my avatar has a fan in the back but that's an old pic.. and the reason it has a back fan was for air movement over motherboard, not to suck air out. biggrin.gif

You can't have more air coming in than going out... or it will blow up like a ballon biggrin.gif

No, your case will not collect dust if you have more fan blowing in than blowing out. rolleyes.gif

No, your case air will not get hotter because you have more fans blowing in than out. rolleyes.gif
Edited by doyll - 1/26/13 at 9:51am
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