Overclock.net › Forums › Cooling › Water Cooling › Fan Testing Round 12 begins, thanks to cpachris and Prymus. NB e-loop, SP120, NF-F12, Cougar Vortex PWM, Vortex, Red LED, Pirahna, AP-45
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Fan Testing Round 12 begins, thanks to cpachris and Prymus. NB e-loop, SP120, NF-F12, Cougar Vortex PWM, Vortex, Red LED, Pirahna, AP-45 - Page 3

post #21 of 41
Great stuff Martin,hope you get more fans donated.
I will have a rummage in the spare's cupboard to see what i can send you.
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post #22 of 41
Thread Starter 
Thanks!
Quote:
Originally Posted by Electrocutor View Post

Have you thought about changing your test setup to record sensor readings on a timed interval automatically into a computer and have it plot the graphs on its own?

I have. some of my meters are actually RS232 capable, but with sound being as complex as it is, I am not happy with the meters on their own. Sound quality is one thing noise level misses so I consider the audio recording the #1 priority. The video method just ties it all together nicely and it's easy to do. I have considered some sort of automated rolling speed increase, but lack the tools for that.

What I have considered more is trying to build a two fan test rig as I have found a single fan test can also miss that rpm harmonic that is present in some fans. Just hard to get two fans worth of samples though.

I also wouldn't mind building a larger flow and 0-1" H20 manometer to measure the P/Q curve of the fans, but I have a hard time justifying it. Noise on a radiator is really what matters, not what the maximum air flow performance is, so noise vs air flow through a radiator it is. Having a silent room to do the noise testing would be nice as well, but another unreachable.
Edited by Martinm210 - 5/9/13 at 6:18pm
    
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post #23 of 41
Can't wait to get home and see these videos! Thanks for the efforts Martin. As always, you are the man! I was very curious about those new Cougar LED fans, since the stats look very appealing on paper.
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post #24 of 41
So the GT is really the king of fans? For the longest time I though it was noctua's but it seem it was all a lie :S
post #25 of 41
Love these. They help me make an informed decision on what I plan to buy.
However. I have two fans I wonder if you know anything about.. (Possibly.)
If not, when I buy my next fans I could pick up an extra of both and send them to you.
1. LEPA Casino 4C 120 mm Warning: Spoiler! (Click to show) It has PWM so, Im very curious how it performs.

2. Silverstone Air penetrator 120 mm Warning: Spoiler! (Click to show) Not sure if youve done a test on this one. I couldnt find it on your site so I assume not.


Would be awesome if I could help out with those. Especially since the LEPA fan is new.
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post #26 of 41
Thread Starter 
Quote:
Originally Posted by kingduqc View Post

So the GT is really the king of fans? For the longest time I though it was noctua's but it seem it was all a lie :S

Probably just because the Noctua NH-D14 is a really awesome heatsink. Fans may be good on a heatsink too, but a radiator is different.
Quote:
Originally Posted by solidshark91493 View Post

Love these. They help me make an informed decision on what I plan to buy.
However. I have two fans I wonder if you know anything about.. (Possibly.)
If not, when I buy my next fans I could pick up an extra of both and send them to you.
1. LEPA Casino 4C 120 mm Warning: Spoiler! (Click to show) It has PWM so, Im very curious how it performs.

2. Silverstone Air penetrator 120 mm Warning: Spoiler! (Click to show) Not sure if youve done a test on this one. I couldnt find it on your site so I assume not.


Would be awesome if I could help out with those. Especially since the LEPA fan is new.

Never seen the LEPA, but I did test an SS Air Penetrator many moons ago. Unfortunately it was done by video only and I've since lost it. It performed worse than a $5 yate loon, I remember that much. Smoke and Mirrors...good fan for blowing smoke out of a box but nothing really special on a radiator. The little directional fins on the back seem to cause more restriction and noise more than anything.

The more I test fans the more it seems that the "Unusual Features = Crap Performance". The Noiseblocker e-loop is the first fan that really look different and actually seems to do pretty well too. All the wavy blade, notches, teeth, perforated frames, directional fins...blah blah blah...it is all marketing to fool you into thinking they have something special when in reality these features do nothing and many actually degrade performance.

The only thing I see that seems to help radiator performance is more dense blades, higher numbers of blades, forward sweeping blades, and perimeter stiffening rings type stuff. Something about making those blades more rigid so they don't flex and covering up the radiator with dense blades seems to help keep the noise buried in the rad better.
Edited by Martinm210 - 5/9/13 at 7:53pm
    
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post #27 of 41
Quote:
Originally Posted by Martinm210 View Post

I have learned not to judge by ear with fans that vary in max performance because inevitably the fan with the lowest max speed seems to wins by ear. You really have to compare like air flow levels back and forth back to back after processing to gain a good sense.

Have to agree. Seen many fans recommended to be quiet and have "good" static pressure, and after some investigation it turns out that they are low-rpm and the performance is measured by quoting the specs on the packaging, rather than actually comparing temps at similar rpm.
Quote:
Originally Posted by Martinm210 View Post

The more I test fans the more it seems that the "Unusual Features = Crap Performance". The Noiseblocker e-loop is the first fan that really look different and actually seems to do pretty well too. All the wavy blade, notches, teeth, perforated frames, directional fins...blah blah blah...it is all marketing to fool you into thinking they have something special when in reality these features do nothing and many actually degrade performance.

Interesting thumb.gif
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post #28 of 41
thanks Martin great work as always.
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post #29 of 41
Reppped! Great thread, short to the point conclusions, love the noise:airflow criteria.
 
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post #30 of 41
I just saw this article on martin liquid lab.

I'm honestly very surprised by how the SP120 sounded. There seemed to be some bearing noise. It sounded loud for an fdb at lower speeds in that video.
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  • Fan Testing Round 12 begins, thanks to cpachris and Prymus. NB e-loop, SP120, NF-F12, Cougar Vortex PWM, Vortex, Red LED, Pirahna, AP-45
Overclock.net › Forums › Cooling › Water Cooling › Fan Testing Round 12 begins, thanks to cpachris and Prymus. NB e-loop, SP120, NF-F12, Cougar Vortex PWM, Vortex, Red LED, Pirahna, AP-45