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Discussion Starter #1
Thanks to Nguruthos7, I got a new Gentle Typhoon from a group buy. They bought some 2150 rpm PWM Gentle Typhoons from Tao Bao.

Here's the box:

box

Packaging and accessories:

packaging and accessories

Black screws, silver screws and

plastic fan fasteners

plastic fan fasteners.

GT Exhaust side:

Tao Bao GT exhaust

GT intake side:

Tao Bao GT intake

I ran a PWM diagnostic, courtesy of my Gigabyte MB. This is the only fan that showed slower speeds as the PWM duty went down to zero:

100%2243
90%2243
80%2143
70%2015
60%1870
50%1700
40%1524
30%1308
20%1094
10%920
0%898

Then I compared the Tao Bao GT with some other fans:

DateFanBlade PowerDrawSPFreeFreeFree
---Power: PWM headerNo.BearingWattsAmpsmmH2ORPMdBA 10cmAdj dBA
specTao Bao Gentle Typhoon PWM9ball6.36(s)0.1232.872150---30
04/14/16Tao Bao Gentle Typhoon PWM9ball---------22205131.0
specScythe Gentle Typhoon 18509ball4.32(s)0.0832.061850---28
04/14/16Scythe Gentle Typhoon 1850 #29ball---------18654626.0
DateFanBlade PowerDrawSPFreeFreeFree
------No.BearingWattsAmpsmmH2ORPMdBA 10cmAdj dBA
specSan Ace 9S1212P4M0117ball1.560.132.31850---24
04/14/16San Ace 9S1212P4M011 #67ball---------184445.525.5
specTitan Kukri9Z3.840.323.62200---35
04/14/16Titan Kukri9Z---------22655636.0
specCooler Master Blade Master sleeve4.320.363.92000---32---
04/14/16Cooler Master Blade Master #17sleeve---------20715535.02027
specCooler Master Jet Flo 1207POM4.80.422.722000---36---
04/14/16Cooler Master Jet Flo 120 #27POM--------- 5737.02320

Fan30 FPI RadCFM#1FilterCFM#1BoxCFM#1
Power: PWM headerRPM30 FPI RadRPMFilterRPMOpen
Tao Bao Gentle Typhoon PWM---------------69.00
Tao Bao Gentle Typhoon PWM212960.222116100.52199111.9
Scythe Gentle Typhoon 1850---------------58.30
Scythe Gentle Typhoon 1850 #2176755.21178179.83183982.90
Fan30 FPI RadCFM#1FilterCFM#1BoxCFM#1
---RPM30 FPI RadRPMFilterRPMOpen
San Ace 9S1212P4M011---------------58.60
San Ace 9S1212P4M011 #6175353.43175875.68182477.31
Titan Kukri---------------66.62
Titan Kukri233660.56226590.58241198.26
Cooler Master Blade Master---------------76.80
Cooler Master Blade Master #1202763.47203989.812021111.9
Cooler Master Jet Flo 120---------------95.00
Cooler Master Jet Flo 120 #2232074.87238594.422192124.80

I had to split up the table. I thought you could horizontally scroll. My bad. It looks pretty B]\bad, but the table with the dates is complete to the sound part. The second half of the table lists the fans with no dates. I can't delete, so we have to make do with what we have. You are looking at my raw spreadsheet.

Where you see an (s), that represents the amps drawn at startup, not the watts used during normal operation. CFM #1 means that I used the anemometer #1. It reads "hotter" than #2, but I wore out the socket on #2.

You can see that the RPM's differ, depending on the work the fan is doing. I am still thinking about what the speedups and slowdowns mean.

Of all the fans, the GT's are the quietest. The Jet Flo is really loud. The Scythe GT 1850 shows about wjhat you will get if you get a Darkside PWM GT specced at 1850 rpm. Have fun.
 

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Thanks for the info, ehume!

I so misread the title - Saw it as Taco Bell Gentle Typhoons....Got excited, that's the kind of drive-thru service sale that would put wind in my sails...

I'm curious if you perform dba measurements over the PWM range and note any sonic artifacts?
 

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Nice bit of testing @ehume
thumb.gif

How about this?
 
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What kind of filters did you use? As I would use them as case fans behind foam filters this would be nice to know.
 

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Discussion Starter #6
I used generic metal filters. You can look at my most recent fan reviews on Overclockers to see the filter. I include the 30 FPI filter so you can get some notion of the flow through restrictions.

doyll -- how did you do that? an image? I should have thought of that, but I thought my spreadsheet would have a horizontal scrollbar. Once I was committed to that, I didn't think of other solutions. +rep

Microcat: Taco Bell fans. What a concept!
 

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Quote:
Originally Posted by ehume View Post

Microcat: Taco Bell fans. What a concept!
 

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Quote:
Originally Posted by ehume View Post

doyll -- how did you do that? an image? I should have thought of that, but I thought my spreadsheet would have a horizontal scrollbar. Once I was committed to that, I didn't think of other solutions. +rep
Just edited data into Excel graph and put that into Paint with a few quick mods. After posting the above I added some shading to high-light your data.


Then move things around so fan name to test data is easier to compare.


I assume the date column with spec and dated lines are manufactures specifications on spec line and your results on dated line.?

Still needs test equipment, procedures, conditions, etc added
 

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@MicroCat wanted Taco Bell GT

Be careful what you wish for. When Taco Bell came to town our stray cat and dog population dropped dramatically.
biggrin.gif
 

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Discussion Starter #11
Quote:
Originally Posted by doyll View Post

Quote:
Originally Posted by ehume View Post

doyll -- how did you do that? an image? I should have thought of that, but I thought my spreadsheet would have a horizontal scrollbar. Once I was committed to that, I didn't think of other solutions. +rep
Just edited data into Excel graph and put that into Paint with a few quick mods. After posting the above I added some shading to high-light your data.


Then move things around so fan name to test data is easier to compare.


I assume the date column with spec and dated lines are manufactures specifications on spec line and your results on dated line.?

Still needs test equipment, procedures, conditions, etc added
You are right about mfr specs and date tested. Because this is not a full review, you can look up the methods on Overclockers -- I used the same method as the 15 Case Fans Tested: Ultimate 140 mm Roundup review. I can't link to it.
 

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Well it seems that unless we have any fans that outperform the Gentle Typhoon, this PWM 2150 rpm (and the 1850 rpm versions) may be the ultimate 120mm fan. Quiet during idle and noisy when we need it to be.

The only drawback is the cost.

Right now I'm running 4 2150 rpm versions on my PC plus I've got 10 more on a fan controller of the 1850 rpm non-PWM version.
Quote:
Originally Posted by MicroCat View Post

LOL! Don't give TR designers ideas for their next theme-busting colour combos.

What I hoped for was a free GT with every drive-thru order.
biggrin.gif
There have been many GT look alikes. The problem is that they don't copy the actual aspects that make the GT awesome - particularly the excellent motor that Nidec has equipped the Gentle Typhoon with. All they usually do is to make a look alike in the blades or the colours.

The rivals are the San Ace (as shown although it is a bit behind), the Deltas, and other Nidecs. The motor, carefully designed blades, and the fact that they are all individually balanced play a big role in the performance of the GT.

For a sleeve bearing fan, the Blade Master actually isn't that bad. Amongst the mainstream fans, the Vardar can be a rival, although subjectively I find it less pleasant due to the noise it has at lower rpms. The only weak point of the GT is that between about 75-90% of rpm, sometimes it has a "resonance" that is not pleasant.

As far as a Taco Bell fan .... we don't want a "McFan" that is cheap and is more about looks than real performance (plenty of LED fans out there)

Quote:
Originally Posted by ehume View Post

You are right about mfr specs and date tested. Because this is not a full review, you can look up the methods on Overclockers -- I used the same method as the 15 Case Fans Tested: Ultimate 140 mm Roundup review. I can't link to it.
For anyone interested, this is the study:
http://www.overclockers.com/15-case-fans-tested-ultimate-140-mm-roundup/
 

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Discussion Starter #13
Quote:
Originally Posted by CrazyElf View Post

Well it seems that . . . this PWM 2150 rpm (and the 1850 rpm versions) may be the ultimate 120mm fan. Quiet during idle and noisy when we need it to be.

. . . The rivals are the San Ace (as shown although it is a bit behind), the Deltas, and other Nidecs. The motor, carefully designed blades, and the fact that they are all individually balanced play a big role in the performance of the GT.

For a sleeve bearing fan, the Blade Master actually isn't that bad. . . .
I agree with you. This PWM is the ultimate 120mm fan.

I use the San Aces all the time because they are PWM and I have eight of them. I can use a few and still have some to test. But this GT is the better fan.

The Blade Master surprised me with how good it is. But it's still pretty loud. IMO the numbers to watch are the "Adj dBA" (approximate SPL adjusted to 1 meter) and airflow through the rad (CFM at 30 FPI).

Thanks for the link. By local rules, I'm not allowed to link to my own stuff.
 
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