Case fan setup for positve or negative pressure? Good for GPUs??

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Shrewsie_B

Shrewsie_B

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Apr 17, 2013
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Hey guys, this is my first PC build and I was wondering if this case fan setup is a solid one for gaming?

Is it positive or negative?

Any comments or suggestions welcome.

..And I know my cable management leaves something to be desired but gimme a break for now.

The 140mm top exhausts are maxing at about 1100 rpm. (Corsair AF140 quiet editions)

All the 120s are Corsair AF120 performance ed.

I also have a 120 on the side panel blowing on the GPUs.

Bottom and side panel fans: 1400rpm
Front intake fan: 1400rpm
Back exhaust fan: 1215prm
Cpu fan: 640rpm (Coolermaster Hyper 212 plus)

Case is Corsair 200r

http://imageshack.us/scaled/large/837/w6mh.jpg

Thanks
http://imageshack.us/scaled/large/542/17xx.jpg
 
Solution
A
Looks like you have three exhaust fans, the 120mm rear and the two 140mm up top. From what you have told us, you have three intake 120mm fans, the front, bottom and side. Assuming that all fans are running full-on, to identify whether your system is operating as a positive or negative pressure set-up, you just add up the CFM ratings to see how mauch you have coming in vs how much you have going out. If you are pulling in more air than you are exhausting it would be considered a positive pressure set-up. This means that since you have more air coming in than going out via your exhaust fans, the difference will look to escape through other vents/openings in your system. This will help minimize dust being drawn inside. However, if your...
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animal

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Jan 23, 2010
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Looks like you have three exhaust fans, the 120mm rear and the two 140mm up top. From what you have told us, you have three intake 120mm fans, the front, bottom and side. Assuming that all fans are running full-on, to identify whether your system is operating as a positive or negative pressure set-up, you just add up the CFM ratings to see how mauch you have coming in vs how much you have going out. If you are pulling in more air than you are exhausting it would be considered a positive pressure set-up. This means that since you have more air coming in than going out via your exhaust fans, the difference will look to escape through other vents/openings in your system. This will help minimize dust being drawn inside. However, if your exhaust fans are pushing out more air than your intakes are bringing in, then this will be a negative pressure set-up, meaning that the additional air will be drawn into the case through other vents/openings.
There are pros and cons of each type (positive vs negative) so you will need to decide which you prefer.
As far as the CPU fan, all it is doing is moving air across the cooling fins, it is neither intake nor exhaust as far as your rig is concerned. Hope this helps.
 
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