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I need 140mm fans to pull air through filter; do I need high SP?

post #1 of 3
Thread Starter 
Okay so first, this is what I have:
NZXT Switch 810
2 140mm intake fans running through filter (I think these: http://www.newegg.com/Product/Product.aspx?Item=N82E16835146002)
1 of the same type running exhaust at 50% speed
1 Corsair SP120 running exhaust through radiator at about full speed: http://www.newegg.com/Product/Product.aspx?Item=N82E16835181039

I have always wanted to get positive pressure inside the case, and I do, right up to when I put the filters on the intake fans and it kills their RPM. I have noticed that the radiator has been getting dusty as well as other things because it is pulling air through holes in the case rather than through the intake fans.

Should I upgrade my intake fans to something with more RPM? Because once the filters are on the RPM will drop to something less noisy anyways. Like these: http://www.newegg.com/Product/Product.aspx?Item=35-146-010&SortField=1&SummaryType=0&Pagesize=10&PurchaseMark=&SelectedRating=-1&VideoOnlyMark=False&VendorMark=&IsFeedbackTab=true&Keywords=%28keywords%29&Page=1#scrollFullInfo. Or should I upgrade to a static pressure optimized fan? The options are much more limited for 140mm, does anyone have suggestions?

This are pics of my cases air flow:
http://i1163.photobucket.com/albums/q547/wgreenlee4/IMAG0754.jpg
http://i1163.photobucket.com/albums/q547/wgreenlee4/IMAG0755.jpg

Thanks guys smile.gif I appreciate it.
AMD power!
(20 items)
 
  
CPUMotherboardGraphicsRAM
1075T MSI 990FXA-GD80 2 XFX 5770's Corsair Vengeance 
Hard DriveHard DriveOptical DriveCooling
Crucial M4 Seagate Asus Zalman LQ-320 
CoolingCoolingOSMonitor
Corsair SP120 PWM High Proformance Silverstone Air Penetrator 140MM Windows 7 x64 Ultimate HP 22" 1680x1050 
PowerCaseOtherOther
OCZ 700 watt modular NZXT Switch 810 UV and Blue Cold Cathodes Arctic Silver 5 Thermal Paste 
Other
Rosewill sleeved cables 
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AMD power!
(20 items)
 
  
CPUMotherboardGraphicsRAM
1075T MSI 990FXA-GD80 2 XFX 5770's Corsair Vengeance 
Hard DriveHard DriveOptical DriveCooling
Crucial M4 Seagate Asus Zalman LQ-320 
CoolingCoolingOSMonitor
Corsair SP120 PWM High Proformance Silverstone Air Penetrator 140MM Windows 7 x64 Ultimate HP 22" 1680x1050 
PowerCaseOtherOther
OCZ 700 watt modular NZXT Switch 810 UV and Blue Cold Cathodes Arctic Silver 5 Thermal Paste 
Other
Rosewill sleeved cables 
  hide details  
Reply
post #2 of 3
Do you have 140mm bottom intake (up to 2)?


Did you remove the middle HDD cage?

You might need to do push-pull on whatever HDD cage you keep

The front panel on the Switch 810 is an atrocity: it's basically a solid panel with a triangle cutout at the bottom of the front panel , besides the side "vents".

Some people mod it for airflow purposes:

http://forums.anandtech.com/showthread.php?t=2243232

http://forum.overclock3d.net/showthread.php?t=41208

As far as fans go I'd probably get a Thermalright TY-147 or Phanteks PH-F140TS or HP for the front (as to not ruin your color scheme). Noctua NF-A14 if you can deal with the color. tongue.gif

edit: Cougar Vortex 140mm HDB also if you can deal with the coloring. The Phanteks PH-F140SP_BK has no real reviews so I can't recommend that without seeing real numbers (Phanteks claims 80CFM which is ridiculous)
Edited by AlphaC - 11/5/13 at 11:49am
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post #3 of 3
as AlphaC has indicated, your best option is to add the bottom intakes to add to the incoming CFM to the case. when you add air filter, you cut the CFM, not the RPM of the fan smile.gif what this means if you want to recover some of that CFM with the same intake, you will need higher static pressure on that fan. so yes static pressure WILL improve your income CFM since it will overpower the airflow resistance of the filter much better.

so, basically buy a high static pressure fan and add it to the bottom intake as indicated by AlphaC. this way you have 3 intake fans to help establish your positive pressure. see how that works out for you. if you are still having problems, then add another to the bottom intake so you'd have 4 intake fans. that should absolutely bring you into positive pressure status.
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