Positive pressure VS Negative pressure

[GamerChris2011]

Hi, ive just brought a Corsair 750d, i love the case but i want to fill the case with Corsair AF120 quite edition fans, but the thing is i want to keep my pc as dust free as possible, i know you do this by having positive pc pressure. There is two intakes in the front three 120's in the top and one 120 in the back. I know top fans should really be used as a exhaust but if i put the AF120s as intake to get positive pressure i would not be able to see the rings on the fans. So the real question is how much difference does possitive pressure make with dust it the case will i notice big dust build up with negative pressure over positive. Any response will be greatly appreciated, Thanks Chris

[Matsy]

Short answer yes, you will.

Negative pressure means dust will easily get in your case as-well as easily settle.

Positive pressure means dust will have a hard time getting in apart from where your intake fans are (have dust filters as-well)

[Ookami]

Youll still accumulate dust if you dont have dust filters on your case installed. Second thing is planning the overall placement of the fans. Make rear fan as intake same as front ones and top ones as outtake. Heat always go up soo it will speed it up. Air colliding from front and rear will be sucked by top fans. Rest will blow out by all holes in the case itself. 3 in and 2 as out will make proper positve pressure...

[Dravic]

Hi, ive just brought a Corsair 750d, i love the case but i want to fill the case with Corsair AF120 quite edition fans, but the thing is i want to keep my pc as dust free as possible, i know you do this by having positive pc pressure. There is two intakes in the front three 120's in the top and one 120 in the back. I know top fans should really be used as a exhaust but if i put the AF120s as intake to get positive pressure i would not be able to see the rings on the fans. So the real question is how much difference does possitive pressure make with dust it the case will i notice big dust build up with negative pressure over positive. Any response will be greatly appreciated, Thanks Chris

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[Bobert]

I can say from first hand experience that I much prefer positive pressure to negative pressure. It has made a noticeable difference.

[KamiKatze]

What you could do with a case of this size is get a fan controller and set custom fan curves. So the exhausing fans would allways spin a bit lower than the intake fans -> pos. air pressure. Prolly top 3 exhaust. Front and Back intake.