Fan Testing Round 12

Posted: May 7, 2013 in Fans

Welcome to round 12 fan testing:

A huge thanks goes out to cpachris and Prymus of OCN for sponsoring the fan samples!


Gentle Typhoon AP-15 1800RPM

Gentle Typhoon AP-45 2150RPM

Noctua NF-F12 1500RPM

Noiseblocker E-Loop B12-3 1900RPM

Akasa Piranha

Corsair SP120 High Performance 2350RPM

Cougar Dual-X Red LED CF-D12HB-R 1200RPM

Noiseblocker E-Loop 2400RPM B12-4

Cougar Vortex PWM CF-V12HP 800-1500RPM

Cougar Vortex HDB  CF-V12H 1200RPM

Under construction…Videos are now uploaded, but I have not extracted any chart data.

Doing a quick video review I find the following

@400FPM air flow levels

  • The two GT fans have the lowest noise level (Around 38dBA)but do have a slight whine noise quality.
  • The two Noiseblocker e-loops have the second best noise level at around 43dbA and slightly better noise quality  (more air noise and less bearing whine)
  • The Corsair SP120 has the third lowest noise level at around 44-45dbA but does have a little bit more motor noise.
  • The three Cougar fans get fourth in noise level with a varied noise quality.  The PWM flavor does exhibit more noise using voltage control than the HDB model.  The Dual-X and Vortex HDB are pretty close.  The Piranha fan is a similar noise level an quality at around 46 or so dBA, fairly smooth but not silky smooth either.
  • The loudest fan at 400FPM is the Noctua NF-F12 at around 48dBA

@500FPM air flow levels

  • The two GT fans continue to have the lowest noise level at 42-43dbA, but it is a different tone (very little air noise, mostly just a bearing sound).  Interestingly the AP-45 sample seems a bit smoother here than the AP-15
  • The Corsair SP120 is second lowest at this performance level at about 49dBA, noise quality is ok but not ultra smooth either.
  • The Noiseblocker B12-3 1900RPM model may not have super low noise level at 50dBA, but by ear it actually sounds much better.  It is a smoother sound quality and makes it seem like a good number and actually comparatively good as the GTs.  Also interestingly the noise quality of the higher speed Noiseblocker e-loop 2400RPM doesn’t seem nearly as good as the 1900RPM slower speed brother at this performance level.
  • The Cougar Vortex PWM is the only one to make it this far of the Cougars and putting out around 52dBA however noise quality is rather poor with a stronger motor tick.
  • The Noctua and Piranha also have legs to get to this air flow level, but the noise is also higher in the 52-53dBA levels and the noise quality not very good.  The Piranha also seems to have a slight motor tick at this speed.

@600FPM air flow levels

  • The two GT fans continue to have legs to get to this point and at their trademark low noise levels although not what I would call great noise quality.  There is a rather dominating bearing noise without much air noise to mask it.  Regardless, it is hard to argue with the low 46dBA noise level at these speeds.
  • The Corsair SP120 would take second lowest noise level at this point with about 54dBA.  It is considerably higher than the GTs, but still seems to be in it’s game without any unusual noise quality issues, fairly smooth for the speed.
  • The B12-4 higher speed Noiseblocker E-loop also makes it this far, but noise quality dramatically reduces with a higher whine developing. Noise level is a similar 54dBA, but it sounds louder than that by ear.
  • The Piranha also has legs to get here, but it’s the loudest of the bunch at 58dBA and also has some noise quality issues with an undulating low frequency and some motor tick.
  • The Noctua and Cougar fans are not capable of this much air flow.

@700FPM air flow levels

  • Only the GT AP-45 2150 model is capable of getting here and continues it low noise crown at only 49dBA but noise quality is continuing to suffer a little bit with a more pronounced whine.
  • Only the Noiseblocker e-loop 2450 model can make it here, but at the cost of a higher noise level 58dBA and noise quality is also poor, just flat getting loud at this point.
  • All other fans are not capable of getting this far.



That would be a tie between the Gentle Typhoon AP-45 (2150) and the Noiseblocker E-loop B12-4 (2400RPM) model.  I measure roughly 72hz(2160RPM) from the GT and about 77hz(2310RPM) coming from the NB.  So despite the RPM advantage the GT is still producing the same air flow through the radiator which is a tribute to it’s very pronounced and curved PQ curve.


The Gentle Typhoons retain their crown on this criteria and really shine at very high speeds, but that differentiation does drop off as speed decrease.  The Noiseblockers e-loops also have an interesting noise quality and perform really well at speeds below about 1500RPM.  At the 400FPM and 500FPM performance levels by ear I have a hard time telling the difference between the GTs and the Noiseblocker B12-3.  The smoother noise quality of the Noiseblocker almost seems to make up the different in noise level.  The Corsair SP120 also does fairly well on noise level and consistently so throughout it’s speed range, it’s just not as smooth in noise quality as the NBs are at slower speeds, but it does hold it’s up at higher speeds.  None are even close to the GTs at really high speeds though where the GTs have upwards of a 10dbA noise level advantage.

BEST FAN 300FPM (~1000 RPM)

At this point I would call all the fans relatively the same.  The Cougars, Noiseblocker, Noctua, GTs, Piranha, are all performing in that 36-39dBA and subjectively hard to tell much difference.  This and slower speeds is where it just doesn’t make sense to spend a ton of money on fans.  Cheaper value fans perform just as well as the expensive ones and the Gentle Typhoons also don’t really separate themselves much.  I actually prefer the sleeved and HDB bearing type fans a little better in noise quality at these slower speeds.  I would probably call it a tie between the Noiseblocker B12-3, Noctua NF-F12, and Cougar HDB as they seem to have a slightly smoother sound quality at these slower speeds.

BEST FAN 400FPM & 500FPM (<1500 RPM)

This is where it gets kind of interesting to me.  I kind of like the Noiseblocker e-loop B12-3 at these points although the GTs are good too and do have a slight noise level advantage.  I just like the smoother sound quality of the noise blocker better and I also prefer the looks of the NB fan better.  I’m going to call it a tie between the GTs and the Noise blocker E-loop B12-3.

BEST FAN 600FPM & 700FPM (>1500 RPM)

While the noise blocker is really nice at slower speeds, the Gentle Typhoon rules the high speed area.  I wouldn’t call either one silent or perfect in noise quality, they do produce a different tone which seems slightly more whiny with bearing noise than others, but the noise level is remarkably low in comparison.  The Corsair SP120 is actually not too bad at higher speeds as well, but it does have a slightly lower maximum where the GT AP-45 is doing just a bit better.


Overall.  I was a bit surprised by the Noiseblocker e-loop B12-3 at the mid speed range, very good noise quality makes them competitive with the GTs.  The cougar fans seem to do well at very slow speeds, but they are a bit limited in higher speeds and didn’t do as well as I hope based on forum comments.  The Noctua NF-F12s do well at very slow speeds, but very poor at the higher speed relative to the forum comments.  I don’t understand why they are so often so highly recommended except I know of a few reviews done out there without proper tools that are likely spreading bad information as usual.  The corsair SP120 fan also surprised me a bit.  It did seem to do a little better in noise quality than the H100i fans, but it’s not as strong a performer in noise level as many forum recommendations seem to convey.


As always, I would highly encourage you to “Listen” to the videos and be your own judge.  It is very clear to me that the noise level showing in the meter is not at all the full story.  You really need to listen to the audio in the videos and match up air flow numbers to gain a good perspective.  I would also caution that this “Air Flow” comparison is also just approximate.  Comparing thermally would be more accurate, but I know from radiator testing that to do rad thermals accurate, you are looking at a 1 hour test per data point.  I was able to capture upwards of 10 air flow data points per fan in about 10 minutes of flow bench testing.  It took me about 2-3 hours of video recording followed by another 4-5 hours of processing/uploading.  Trying to capture 10 data points per fan over 10 fans thermally would have literally taken 100 hours or more, and yes I’m too lazy for that.  This is the best I’m willing to do and as always, it is just one test.   I would encourage you to take it as such and utilize other resources to gain additional perspectives and test data.

My one and only suggestion about other testing is to look carefully at how they measure noise and performance.  If noise is not measured while the fan is mounted to either a radiator or a heatsink, then the data is pretty much useless.  Noise MUST be measured when mounted in the used condition.

Thanks for looking!


  1. Daveys93 says:

    I have just about read every article you have posted on this site. I just want to say that as someone who is looking to get into water cooling and is looking for more of a technical analysis (I’m an Electrical Engineer by trade), this is by far the best website I have found. I love all of your articles and I hope you continue your research.

  2. Someguy says:

    I know this is probably a really stupid question but what exactly does FPM stand for? I would guess Feet per Minute but I just want to be sure

    as always amazing work

  3. […] hier voor een review van fans voor op een rad (lees gelijk zijn andere reviews over rads en zo) Fan Testing Round 12 | Antwoord met […]

  4. CCrunch says:

    Are we going to get any chart/graph data for this round of testing? May was a while ago, but please do upload them when you get a chance. Thanks for doing this round of testing as some of these fans are the most coveted and debated in the market today for radiator cooling.

    @Someguy: Yes, FPM = ft/min. There is a way to convert FPM/LFM to CFM as well using the cross sectional area of the fan (120mm in this case I believe).

  5. Lost while looking for Gentle Typhoon AP-13 says:


    I need your insight or reader’s help. I have an older MSI big bang mobo MS-7666 that has worked well for years. I’ve got 2 Antec 620’s running with Push/Pull configurations in a Corsair 550D Silent case. One Antec 620 for the overclocked i7 950 at 4.2Ghz and the other for the OC’d EVGA 580. I purchased 8 Akasa Apache fans years ago, before understanding the importance of static pressure AND silent operation. Although very quiet, the Akasa Apache 120’s don’t work well with the 620 radiator’s high fin density or drawing enough air through the restrictive sound dampening front panel.

    The motherboard does not support software for adjustable fan control (SpeedFan is not my friend), and SYSFAN connections are 3 pin. The fans run at 100% all the time.

    I have no desire to put in a physical fan controller.

    After lots of reviews, readings, and of course, your excellent testing, I have decided to purchase 8 Gentle Typhoon AP-13’s, and here’s the gotcha….

    The GT AP-13 fans no longer appear anywhere to purchase!

    AP-15’s are too loud at 1850 rpm, and the AP-14’s although effective, would also be too loud at 100%.

    What do I do?

    • Daveys93 says:

      Well you have a few options. I personally use a fan controller on my 8 AP-15’s which I think is the best way to go. I like the Lamptron FC5V2 or FC5V3. But since you said no to a front panel fan controller I would do one of the following:

      Buy AP-15’s and a 7V adapter for each fan to run them at 1000-1100 RPMs. Here is a good, nice looking (comes in different color sleeving), cheap 7V adapter for 3 pin fans:

      Buy an internal fan controller that you could mount inside the computer case (either in the main area or the cable routing area behind the motherboard). This one has LED lighting so maybe not your thing (although it does come in 4 color options) and you would need 2 of them to run 8 fans though and at ~$30 a piece they are not cheap:

      I would say go with a front panel fan controller as it is more versatile and will allow you to adjust your fans to that perfect performance/noise level. If that really is not an option, I would personally pick the 7V adapter cables for each fan.

  6. Bill W. says:

    @ Lost while looking for Gentle Typhoon AP-13

    Instead of a fan controller, you could just get an inline adapter/speed reducer to run your fans on 7v instead of 12v …

    Directron 12V to 7V Power Adapter / Cable for Case Fans
    Phobya Adapter 3Pin (12V) to 3Pin (7V)

    Or just wire up your own doing the exact same thing those devices do from a molex using the 12v Yellow as the (+) and the 5v Red as the (-) for an effective diff of 7v to the fan(s).

    Or, many case fans would come with a speed reducer cable that had a heatshrink-wrapped resistor or something to that effect that reduced the voltage. IIRC some Prolimatech fans still come with these. Perhaps something like that is available sold separately but not sure what google terms will find them.

  7. Sir Diesel says:

    Great job, please continue your work. Your efforts are immensely appreciated.

  8. JAY says:

    Nice work, I’m tired of people goin on about Noctua fans, Im not impressed by them at all. Not too mention how ugly they are. Love my NB eloop and Gentle Typhoon PWM fans.

  9. komatsu says:

    as i heard noiseblocker eloop series arent designed for push and pull is that correct?

  10. mbze430 says:

    I am in the market to replace my “whiney” Thermaltake water 2.0 stock fan (Power Logic fans). Been searching high and low to see if the Noctua NF-F12 PWM is really say what they say (I currently own the NF-S12A as top case fan). Looks like I’ll be buying the NB Eloop