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post #231 of 476
OK once you are done doing this in push are you going to be doing in pull? Just kidding, you the man.
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post #232 of 476
Thread Starter 
Quote:
Originally Posted by Chunky_Chimp View Post
Now things are getting a bit weird. How is the old one beating the new one? More importantly, how is its CFM topping the U1 and UK3K?
Anything within 3dbA should be considered reasonbly the same, perhaps some sample varience?

I wish newer always meant better...

I have given up on trying to guess how a fan will do..nothing can be assumed.
Edited by Martinm210 - 11/23/10 at 5:46am
    
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post #233 of 476
Thread Starter 
Quote:
Originally Posted by GoodInk View Post
OK once you are done doing this in push are you going to be doing in pull? Just kidding, you the man.
Hehe..no. I'm not even sure I'll bother with the case open air scenario. I'm ready to move on to the 140s now. So far there is little difference in noise level between most 120mm fans. I think there is some notable sound Quality differences, but I can't quantify that very well and frankly getting too many complaints about that anyhow. The GTs are the only fan really doing something different regarding noise level, and that's only from about 1000 - 1800 RPMs. Outside of that range, they are all within about 3dbA..so much the same.

Noise quality is also probably only applicable to very low ambient noise environments. If you are using the fans in a loud environment, you probably won't hear the motor ticks and resonance, etc.

Seems like a lost cause now..loosing interest fast..
    
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post #234 of 476
Well on average, a 120mm fan is going to produce a 2:1 CFM to Sound Pressure level in an open air enviroment.

So you'll see 50CFM fans often ine 23-25dB(A) range as it's just common for the size of fans.

140mm Fans expand that to 2.3:1 or even 2.5:1 on some.
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post #235 of 476
I thank you very much Martin!

After looking at the charts I've picked my favorite fans:

AC F12 - Can't beat the price/performance really. Almost the cheapest fan I can get.
GTyphoon - Do I even have to tell you why I like it?

I love your work here.
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post #236 of 476
Thread Starter 
Quote:
Originally Posted by Tator Tot View Post
Well on average, a 120mm fan is going to produce a 2:1 CFM to Sound Pressure level in an open air enviroment.

So you'll see 50CFM fans often ine 23-25dB(A) range as it's just common for the size of fans.

140mm Fans expand that to 2.3:1 or even 2.5:1 on some.
Good to know...thanks!

Quote:
Originally Posted by B!0HaZard View Post
I thank you very much Martin!

After looking at the charts I've picked my favorite fans:

AC F12 - Can't beat the price/performance really. Almost the cheapest fan I can get.
GTyphoon - Do I even have to tell you why I like it?

I love your work here.
I like those two as well as the yates because of their lower cost. I'm sort of leaning on trying some AC F12s out though and thinking of doing a PWM thermally controlled setup.

I just haven't played around much with PWM yet, but it seems like a good idea, especially if you can have it automatically throttle down to 600RPM when doing low key work and up to 1500 during gaming if you needed it..
    
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post #237 of 476
Quote:
Originally Posted by Martinm210 View Post
Good to know...thanks!



I like those two as well as the yates because of their lower cost. I'm sort of leaning on trying some AC F12s out though and thinking of doing a PWM thermally controlled setup.

I just haven't played around much with PWM yet, but it seems like a good idea, especially if you can have it automatically throttle down to 600RPM when doing low key work and up to 1500 during gaming if you needed it..
I actually just set this up for my friend with an Antec 300, Scythe Mugen 2 and 4x Gelid Silent 12 PWM. I got a 4-way PWM splitter from newegg and hooked all of the fans up to the CPU fan header (just the PWM/RPM signals, not the power). Then it was as easy as turning fan control on in the bios and setting the desired CPU temperature to 60C. Keeps the i5 750 @ 4 GHz inside of it under 65 @ load, and 30 idle. It's also ridiculously quiet, especially because he has an SSD for his OS drive.
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post #238 of 476
Thread Starter 
Sanyo Denki San Ace 9G1212M101 38mm

Special thanks to the finisher for sponsoring this fan

NOISE LEVEL
Relative to the yate medium, it's up to 2dbA louder at the lower end, about the same in the middle, and about 1dbA better at the high end and extends a fair amount beyond reach of the yate. Relative to the other fans tested, it was louder than average from about 4-6V, about average 7-9V, and slightly better than average from 10-12V

NOISE QUALITY
Very much like the 9G high speed, has a fairly pronounce motor noise at lower volts that doesn't really clean up until about 10-11V. While this is very subjective and extreme silence based testing, I have been recording every fan at the same Zoom H1 100% manual, low cut on, 12" distance. This fan has a more pronounced motor noise at lower volts, and I wouldn't recommend running under about 10V, it is really best suited running at 12V if possible. I do think the San Ace motor noise is generally smoother than that of the UK3 or PanoU. The UK3 has much more of a "Tick" where the San Ace is more of a motor bump as it turns. A few folks have expressed their own personal experience as one that they can barely here this noise I'm talking about.... So...take the noise quality notes with a grain of salt and listen to the videos with the understanding that this is worst case scenario testing here (absolute silence with an ultra high sensitive microphone) These types of noises are much less noticeable in a system where there are a multitude of other masking ambient noises. As always, in order to split hairs, the testing sensitivity is turned up a notch. My suggestion is to find a similar fan you have on hand, and set the volume level to match what you are used to hearing, then start playing the videos and listen in..

OVERALL
Variable noise level and noise quality, with top notch build quality. Regardless, I much prefer the 9S, 25mm variety over these 38mm variants. The 9S models have exceptionally good noise quality in comparison. If you happen to be a San Ace fan "Fan", I would highly recommend looking more at the 25mm San Aces. While they did produce a higher noise level, I think their noise quality is far superior. The 9SH model also produced more CFM at 12V than this 9GM model did..

VIDEO LINK
Not yet processed at YT, but this link should work when it's ready:

NOTE: I was not able to record RPM data in this test. I recorded what I could.








COMPARED TO ALL FANS TESTED SO FAR

Edited by Martinm210 - 11/23/10 at 6:46pm
    
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post #239 of 476
Thread Starter 
Quote:
Originally Posted by charliehorse55 View Post
I actually just set this up for my friend with an Antec 300, Scythe Mugen 2 and 4x Gelid Silent 12 PWM. I got a 4-way PWM splitter from newegg and hooked all of the fans up to the CPU fan header (just the PWM/RPM signals, not the power). Then it was as easy as turning fan control on in the bios and setting the desired CPU temperature to 60C. Keeps the i5 750 @ 4 GHz inside of it under 65 @ load, and 30 idle. It's also ridiculously quiet, especially because he has an SSD for his OS drive.
Nice, I think I'm going to try this on my son's PC first. He just has an MCR320 and a couple of case fans, so it would be fairly low cost.

If that works out well, I may do the same for the quad rad office setup..
    
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post #240 of 476
Quote:
Originally Posted by Martinm210 View Post
Nice, I think I'm going to try this on my son's PC first. He just has an MCR320 and a couple of case fans, so it would be fairly low cost.

If that works out well, I may do the same for the quad rad office setup..
Damn, I wish my dad built me a watercooling rig when I was that young...
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