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switch 810 negative pressure fail?

J

jamsomito

2[H]4U
Joined
Aug 29, 2010
Messages
3,202
So I just realized that the switch 810 has negative pressure in one of its most common configurations. I have a 360 rad in the roof, a 140 fan in the back, and two 120s in the front. That's 2 intakes and 4 exhausts, negative pressure. Its no wonder my stuff is so dusty all the time... There might as well be no filters because air is coming in from every opening in the case.

I thought about flipping my rear fan around to intake but then it would just be sucking in the hot air from my GPU exhaust and pushing it right up through my rad... Not to mention there is no filter on the back anyway.

Eventually I plan on adding my GPU to the loop along with a 240 rad in the floor. Then I'll have 3.5 intakes (the bottom front will be pretty much blocked by the rad) and 4 exhausts, but there's still going to be slightly negative pressure in the case due to the blocked intake fan, pressure drop from the intake filters, and relatively free-flowing exhausts. This is also ignoring the localized low pressure zones like the intake from the front-most fan on the roof which is pulling from the drive bay cavity (and through the 5.25 bay blanks on the front).

So what gives? Anyone have this same problem/observation? Any tips?
 
You want positive pressure. More intake than out. Dust filters don't work 100%, they simply can't otherwise air wouldn't be getting into the system. Every case ever needs to be cleaned, best is a routine monthly cleaning.
 
Right, but I'm trying to figure out a combination that will allow for positive pressure.
 
I find better results with a triple exhaust, double filtered intake and single filtered passive 120mm vent.

Then again, I'm watercooling. Most people can't sacrifice their rear fan.
 
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