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i'm not really into the noisy fans these days, lookie here :)Quote:
Originally Posted by Martinm210
http://i24.photobucket.com/albums/c5.../prototypo.jpg
its uber quiet dude, its nice you tested the GTs
but yeah at the back i'll be using the koolance,, i already have 8, i'll use them in winter benching :)
Very nice:up:, I do like the tone the GT's produce. Not sure there's a huge noise level difference, but there's definately a tone difference which is more pleasing than the typical 7 blade fan chop.Quote:
Originally Posted by Hondacity
Generally the more fans I've tested, the harder it's become to pick favorites...hopefully that gets better and not worse with the noise testing.
Awesome setup...I'm always enjoy quad rads too.:yepp:
Wow, I was sure I was gonna get the Zalman F3, but seeing these results, I can't decide what I want anymore:eek:
Really nice testing once again Martin, thank you:up:
Nice work Martin. All of us over-engineering xtreme cooling types would have much less to obsess about without out you. ;)
Now when your done with your current backlog let us know. I would like to contribute a 120x120x72 Delta to your testing along with a few other Deltas.
Great info. I'm going to grab some of those noiseblocker xl2s. I have a pile of the san ace, but I'm in the mood for more quiet this summer.
Thanks guys.
I'll try to work in the last few fans I have on had for this round of testing, then I'll probably take a break from this for a while to spend time on an engine rebuild I've started working on.
ei martin any chance of testing some foam alu mesh filters? i wonder how restrictive they are :D
I almost need to get a slightly different setup going to measure pressure drop on stuff like the radiators or other stuff like fans. My little heatercore pressure drop line is only approximate based on actual CFM numbers, but even that I have my own concerns with accuracy. I think you really need pitot tubes and a large flow chamber to measure restriction and pressures accurately. My little setup has it's share of error, it's doing ok, but I'd do it differently if I were to do this all over...Quote:
Originally Posted by Hondacity
Unfortunately, I think I trash canned the few filters I did buy a while back, they seemed to be alot more restrictive than I thought, maybe those aluminum types are better. The only thing I will run on my fans is the simple wire fan grills, I think those are pretty harmless, but I don't like anything more restrictive. I guess it makes sense when you compare pressures.
The very strongest fans can only produce less that .25" of Water, where many pumps can produce over 200" of Water pressure. This is also why I had such a hard time with measuring pressure. It wasn't until I bought this 0-.25" pressure gage, that I could even measure it somewhat consistently. My dwyer 0-20.00 digital manometer was too high pressure oriented to read fan preassures. To do this really right, you'd want one of the super sensetive 0-1.000" manometers capable of .001" resolution.
Anyhow, I avoid filters. Unless you're going to build some sort of rad box that'll hold very low restriction large household style filters. Unlike water flow rates, air flow rate is pretty significant and with the tiny pressures produced by these fans, restriction is also much more important. I was pretty amazed that you would see a performance difference in a radiator by simply changing the FPI one or two folds per inch, but it does matter. This is all due to how sensitive fans are to restriction, particularly slow speed stuff.
Anyhow, I'll try to get a few more runs done this weekend if I'm not stuck at work...I'm not planning to buy any additional fans or parts for the time being though. Need another little vacation, then I'll get back at this again.
i see what you mean, i was just concerned with the dust over here, they're making a 4lane highway, in the morning there is this thin dust film on my windshield...but anyhow my dual quad for the cpu is just great. i think the nidec motors on them have enough oomph for the filters. yeah take a vacation. i think skinnee and vapor and hesmelaugh have the medicine for everybodies addiction :D
to keep you interested, dunno if you've read this but...read it just the same :)
http://www.comairrotron.com/cooling_fan_noise.shtml
Hello Martin !
I read with interest this topic.
I want to put in spreadsheet the possibility of changing the fans ,in addition to other components.
To make that I need the data RPM vs CFM
For example, as these :
http://www.pctunerup.com/up/results/...825_xxxxxx.jpg
For the moment I have the data of these fans :
I have calculated the relevant equations RPM > CFM
http://www.pctunerup.com/up/results/...57_xxxxxxx.jpg http://www.pctunerup.com/up/results/...2_xxxxxxxx.jpg
http://www.pctunerup.com/up/results/...31034_xxxx.jpg
are missing some fans......
if you have the possibility to publish them....:D
*************
I calculated the difference in efficiency between your fans and the fans of Skinnee
so:
http://www.xtremesystems.org/forums/...9&postcount=72
I would like your opinion :D
Thanks! I'll check it out! I'm still interested, I'm just interested in too many things and busy as usual. Spent most of the day Saturday tearing apart the motor on my wife's banshee and then Sunday at work. That left zero time for PC stuff, oh well...perhaps some time during the week or next weekend will present an opportunity.:up:Quote:
Originally Posted by Hondacity
Nice work!Quote:
Originally Posted by AndreaBZ
I'll try to get the all the individual tests posted again, it just takes time and I got discouraged after loosing a bunch of the work when the database was turned back.
If nothing else I'll post up a zip file of the spreadsheet I'm building for data.:up:
If I were to buy fans right now I'd prolly go for the koolance 38mm, I like to ramp fan power up to max when I'm lanning or gaming during the summer when I have headphones on anyways. But considering I got my San Ace for 10 bux a pop I'll stick with them hehe.
Thanks for all the testing martin.
Well here I am . .. . again. . .
I totally forgot which fan was right for my application and luckily this thread was on page 1. Might subbie it just for future looks.
FYI,
I've been playing around with a new setup to test for noise and I'm seriously considering giving up on the PQ curve idea all together.
I'm finding some discrepencies between results of the PQ charts vs actual CFM numbers through a radiator and not sure why other than the pressure measurment points must be getting some influence by the fan blade type, etc. Anyhow, the PQ curve was a fun run, but I'm pretty well convinced it's not worth it and has more error involved than I'd like.
Thanks to skinnee for sending me the RS120.
Now I have a more standard radiator I'm working into my new setup, although with the rad testing, I'm finding a need to increase the sensitivity of the anemometer which can only be done by reducing the duct area. Bottom line, my setup will change and I will no longer have the ability to continue collecting data that can be compared with previous work....
Time to start over.:eek: Good news is, I think the results will provide more realistic data and I can do noise testing at the same time, so overall it will save time in testing and I think provide more relevant information.
Stuff like this will be coming, just need to do a little fabrication and calibration work.:up:
http://img524.imageshack.us/img524/4038/fantesting2.png
Unfortunately since starting the noise testing, I can already see how the whole "dB" number isn't the whole picture. For example the Koolance 25HBK, seems to run much lower noise "Numbers" than what my ears would have me believe and I can only attribute this to each fan producing differing "Tones". The slipstream runs really high dB numbers, but the tone is more pleasing and I think the lower ton produces produce higher dB numbers than those that have a higher pitched whine.
Regardless, it's all I've got for measuring noise right now, so it'll have to do. I am testing noise as close to the fan edge/radiator edge as possible to maximize the resolution on my sound meter. This seems to be doing a fair job in making the tool able to measure fairly repeatedly, so that's good.
Anyhow...tinkering on a new setup. No longer continuing with the PQ curves and I would only take them as an approximate more than anything. The next round should be better hopefully.
How is Noiseblocker XL2 Rev.3 in comparison to the Zalman F3 fan on a radiator?
I have XL2's Rev.2 on the MCR220 and I am very fond of them as I run them on 12v without too much noise,
but I am building an AM3 rig and for MCR320 i got the F3, however, so far I had not the time to test the fans.
Which would be the better choice with a fan controller? I know the F3 pushes more air, but at what noise
disadvantage?
Martin, maybe you could sample the fans and run some FFTs to see the spectral content of the audio. I would imagine some interesting trends would fall out, and potential problem areas that are more annoying than others.
I was impressed with how Martin's results with the Skythe SlipStream fan, so I got one to try it out myself. Against my MCR320, the Slipstream was painfully inferior to the ZM-F3. When the noise of each fan was matched, the ZM-F3 moved a lot more air through the rad than the Slip did... The Slips have a ticking that is very annoying and very audible, especially in silent systems. On full power, the Slips most definitely move more air than the Yate Loons (medium) or the ZM-F3, but are always (much) louder. I returned the fan to the store, and bought two ZM-F3s instead.
Yeah, I'm starting over with straight radiator mounted testing only. For I'm still finding the YL high speed pretty close to the slipstream SH in performance which is pretty close to what I got on the PQ curve, but I'm not seeing the benefits of doing the PQ curve testing over standard radiator mounted tests.Quote:
Originally Posted by adpr_02
Anyhow, it'll be a few days as I make tweaks to my setup and run trials, but I'm planning to rerun all of the fans on this new setup.
I'll start a new thread when I get going with results.:up:
I played around a little bit with a spectrum analyzer on my PC, but at least the one I downloaded didn't seem to tell me much.Quote:
Originally Posted by 101
If you find any good links to software that can analize existing audio tracks/video/etc...let me know. I still plan to do some sort of video/audio recording.
<33333333333333333333
75dBa relative to your sensor is DAMN LOUD. Deffo going silent/med-low.
maybe measure in sone?
This is the only thread in the Web where I found all the fans i am interested in tested!
I want to buy 8x120mm fans for case cooling but later they will probably be used in push-pull on a quad radiator, so I am interested in overall performance.
I want something with the potential to be powerfull (and noisy) but also able to undervolt to ~1000 rpm to be quiet. Finally the price is important to me, so no expensive fans.
I have narrowed it down to :
Scythe Slipstream SH (1900rpm) local price per piece : 5 euros
Zalman ZM-F3 (1800rpm) 6 euros
Nanoxia FX12-2000 (2000rpm) 9 euros
Koolance 1225HBK (2600rpm) 7 euros
I am leaning towards the Koolance fan because it seems to have the most potential for power, and yet it can run at 4V on 1100rpm according to your tests which should be silent enough...It's also ball bearing. The Nanoxia is nano-whatever bearing (ball bearing+ durability I guess since it offers 10 years warranty) but also the most expensive. The zalman and the scythe are decent and cheaper but sleeve bearing...
Shoudl I get the Koolance? Can it get really silent on low voltage?
Hi. You should check out Part 2 of this testing as well. The tester (martinm210) has a youtube channel with noise/air flow measurements of lots of different fans over different voltages. The three displays in his videos show airflow (left), voltage (right) and noise (top right). Remember to compare fans at the same air flow. A good tip: GentleTypoon
Yeah, I would suggest Part 2 also, or Vapors testing. This first round one was my first attempt and it was only an attempt at measuring the PQ power curve. It was not an attempt at all to measure noise either.
Anyone want a box of fans?
I need to get rid of them...
I am sure someone will take you up on that offer soon! :yepp: I am not allowed to have any more boxes of fans in the house as per the wife!:rolleyes: