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post #201 of 476
Man using bars would make it alot easier on the eyes to look at the charts >.<
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post #202 of 476
Thread Starter 
Quote:
Originally Posted by Chunky_Chimp View Post
What I don't understand is why they made that a sleeve bearing fan and still marketed it for water coolers. It's also, IMO, the least attractive clear plastic fan out there.
I like my sleeve bearing yates. Been going strong for over 2 years non stop.. Bearing types and names are overrated IMO. I've never had a 120mm fan fail on me and I really don't care what the bearing is as long as it doesn't make noise.

Quote:
Originally Posted by Arkuatic View Post
Man using bars would make it alot easier on the eyes to look at the charts >.<
Been thinking about it, but waiting until they are all done. What sort of variables would you want in the bar system?

I had thought about min-max CFM to give sort of a performance chart. And maybe something like dbA at specific CFM levels or something along those lines. Either one is going to take some work, but I agree, it's getting way too busy. I figured I'd at least do some separation, but it's easier to build one big chart and pull out series than it is to add them.

Looking for ideas..
    
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post #203 of 476
How about something like this arranged with db's/CFM's and CFM's/db's.

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post #204 of 476
I actually prefer the line graphs opposed to the bar graphs. I like seeing how the CFM and noise varies with speed. I like to use fan controllers so I'm concerned with a fan's performance across a wide rpm range not just its peak speed.

EDIT: Wow I'm really impressed with the GT series. It's like all the other fans are lumped together and then the GT's are in a league of their own.
Edited by Epitope - 11/22/10 at 6:34am
    
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post #205 of 476
I'd just like a line graph with the ten least noisy/CFM fans to make it easier to see the difference (current graph is a mess). And the rest of the fans aren't needed anyway, I won't buy an inferior product
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post #206 of 476
Hmmm, kind of expected better in the noise department from the 9S1212H4011 after seeing eHume's results. No matter, now I'm interested in how the 9G1212H1011 undervolts. I'm looking for an upgrade to my GTs which replaced my 109R1212H1011s because of undervolted ticking. Now looking at these results it does seem the GTs, as Epitope put it, "are in a league of their own." Though noise values don't tell the whole story so the descriptions and videos help explain residual noise that might not be reflected.

Also, the CFM vs. RPM charts have been very helpful in seeing possible variation between Skinnee's radiator tests and the use of different fans. It's nice to see even though there isn't a whole lot of variation. The 140mm fan testing should be very interesting.

Great work as always Martin
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post #207 of 476
Thread Starter 
Thanks, that gives me some ideas...I'm also really wanting to somehow chart noise quality, but I haven't quite figured that out. My fear is now, people will look at noise level only and I almost think noise quality is more important.
    
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post #208 of 476
Quote:
Originally Posted by Martinm210 View Post
Thanks, that gives me some ideas...I'm also really wanting to somehow chart noise quality, but I haven't quite figured that out. My fear is now, people will look at noise level only and I almost think noise quality is more important.
Well like you say, its subjective. So the only way to do it is give them a number value.
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post #209 of 476
Thread Starter 
Sanyo Denki San Ace 120 9G1212H101 38mm

Special thanks to "The Finisher" for sponsoring this fan..

NOISE LEVEL PER CFM
Relative to the yate medium baseline fan, it's a little worse at lower volts and improves at it ramps up. Relative to the two other 3000RPM 38mm fans, it's better by about 2-3dbA. So noise level is actually very good from a metering standpoint at high RPMs and is now leading the way from about 42CFM to 55CFM.

NOISE QUALITY
This is again where the sound meter fails to report the whole story, noise quality is simply not captured in noise level.

Relative to the yate loon and most 25mm fans, very poor below about 11 volts. It has a very pronounced motor tick that's fairly harsh in comparison with the smoother 25mm fans. I've heard that PWM will make a worthwhile improvement to this problem, but I'm testing voltage control here and the fan is very ticky at lower volts similar to most 38mm fans. Unfortunately I don't have a good 3pin PWM controller that I can operate without a computer, or I would do a comparison for you. At this point in being consistent with the previous fan ratings, I'm simply going to say keep it at 11V or above if you want smooth sound. I would not recommend undervolting much unless you can some how cover up the motor noise to smooth it out somehow.

If I compare the yate loon medium at 8V in one video window and pause it, then load this fan at 6V pause it. The noise level meter and anemometer have them producing roughly the same noise level and air flow performance level. Yet to my ear, the yate loon is far superior in noise quality. With the yate, I hear air movement, with the San Ace I hear a motor. Perhaps some folks prefer the motor sound. Regardless, the videos are there for the end user to make their own judgements about noise quality.

INDUSTRIAL QUALITY
I think the industrial build quality is worthy of note, these fans are built like a tank and of very high quality. I suspect that is why many folks seem to like them so much, they do make your typical 25mm fan feel like a cheap piece of plastic and there is something to be said about appreciating something of high industrial quality.

COST
PPCS has these fans for $22.99, so the fan is in the "HIGH COST" category, but similar to many of the industrial grade fans, so not unheard of.

OVERALL
Very good noise level per CFM above 2500RPM, noise quality is poor below 11V but smooths out at higher voltage, cost is high, and build quality is excellent.

I'll give the fan a thumbs up for it's lower noise level at 12V compared to the other two ultra high speed fans.

VIDEO LINK







    
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post #210 of 476
Again with the ticking... I don't know how you ended up with that kind of noise profile, like the Panaflo... Well, anyway, the point is, people prefer San Aces because of the respective CFM/voltage ratios (per volt) when undervolting, and because they nearly always maintain a pleasant noise profile at lower voltages.
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