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Secrets of the D14 - Ch 1: Introduction and Solo 140mm fan results (56K warning) - Page 4

post #31 of 81
Haven't spoke to you in a while .Bravo. Very well done ,and extremely scientific as usual..You are the fan master of OCN !!!!!!!!!! Noise is not an issue with me ,but I couldn't be happier with my D14 .
post #32 of 81
Thread Starter 
Quote:
Originally Posted by Elohim;12655351 
nice work, ehume!

just one question: why is the p14+p12 combination more quiete than the p14 alone??? i'm kind of confused lol

Well, half a decibel is well within the margin of error, but the difference is consistent. I've noticed that the direction and intensity of airflow makes a difference when it comes to noise. More than that: I have made no hypotheses, so I have nothing to test.
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post #33 of 81
more chapter wanted tongue.gif i wanna know if the cooilng is about the same with a gap in the middle using 2 120mm gentle typhoons 1850rpm tongue.gif
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post #34 of 81
Quote:
Originally Posted by ehume;12662872 
Well, half a decibel is well within the margin of error, but the difference is consistent. I've noticed that the direction and intensity of airflow makes a difference when it comes to noise. More than that: I have made no hypotheses, so I have nothing to test.

I have a feeling it may have to do with the fact that having two fans in a row lends to less turbulence since there are two towers both with a considerable amount of fins. I'm guessing that if you had one fan in the center the air feeding it (going through the first tower) would be quite turbulent. However with a fan in front pushing air through, the intake for this fan is open and unobstructed and the fan itself may dampen the noise somewhat as well.
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post #35 of 81
I got about 6-7C cooler 2 Delta's, however the wife came running downstairs. So now I have to deal with stock.
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post #36 of 81
Thread Starter 
Quote:
Originally Posted by TickleMeElmo;12736071 
I have a feeling it may have to do with the fact that having two fans in a row lends to less turbulence since there are two towers both with a considerable amount of fins. I'm guessing that if you had one fan in the center the air feeding it (going through the first tower) would be quite turbulent. However with a fan in front pushing air through, the intake for this fan is open and unobstructed and the fan itself may dampen the noise somewhat as well.

Nice potential explanation. Now to think of a way to test it.
Quote:
Originally Posted by bratas;12742654 
I got about 6-7C cooler 2 Delta's, however the wife came running downstairs. So now I have to deal with stock.

Are those 38mm Deltas? What cfm and static pressure? Nice to have an additional data point.
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post #37 of 81
Delta AFB1212GHE-CF00 120x38mm
240.96 CFM @ 5200 RPM
62.0 dBA
27.48 watts
2.45 amps
Maximum Air Pressure 29.18 mm H²O
12v DC
3 pin connector

I am going to try some more tests this weekend, I am curious what the performance would be with both being Push/Push.
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post #38 of 81
a conclusion would also be nice for the people that are lazy and do not want to read everything lol.... summing up what the best configs are would be awesome
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post #39 of 81
Thread Starter 
Quote:
Originally Posted by bratas;12753992 
Delta AFB1212GHE-CF00 120x38mm
240.96 CFM @ 5200 RPM
62.0 dBA
27.48 watts
2.45 amps
Maximum Air Pressure 29.18 mm H²O
12v DC
3 pin connector

I am going to try some more tests this weekend, I am curious what the performance would be with both being Push/Push.

Please post the comparative results. I've just finished doing that very thing, but not with 250cfm monsters.
Quote:
Originally Posted by badatgames18;12756448 
a conclusion would also be nice for the people that are lazy and do not want to read everything lol.... summing up what the best configs are would be awesome

When I'm done with the series, I'll do just that.
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post #40 of 81
@ OP, Nice educated review. Thanks!
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