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Different sized (thinkness) fans for P/P

post #1 of 3
Thread Starter 
Hypothetically, let's consider a couple of things:
  • I'm shooting for a quiet setup
  • I'm using an 80mm rad (Alphacool Monsta 320)

I'm assuming that thicker fans produce higher static pressures and can therefore be run at lower speeds (therefore more quietly) to achieve the same performance as thinner fans.

If I can't quite squeeze two 38mm fans in with the 80mm rad, but one 38mm and one 25mm fan would work, should the thinner fan be on the push or the pull side? Would it even matter? Or would performance be better just going with 25mm fans on both sides?
post #2 of 3
I would think the thinner fan on the exit side/pull side. Higher CFMs (possibly) to suck-then-blow the exhausting air that the static pressure fan is pushing though the fins.

The thicker fan would work on the exit side, but the thinner fan would struggle to push through the rad.
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Fine 4 Games
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Optical DriveCoolingOSMonitor
LG OEM NZXT x61 Windows 8.1 Asus VX238H 
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MS Sidewinder x4 xfx 650W NZXT S340 Logitech G400 
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Nova Raider Asus DGx 
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post #3 of 3
I'd stick with two 25mm fans w/ good static pressure if you can't fit 2x 38mms.
When you use different fans with different rpm/static pressure ratings you can potentially burn one or the other out pretty quick.
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