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[Official] Gentle Typhoon 2150 Group Buy Thread - Page 221

post #2201 of 2446
Quote:
Originally Posted by nawon72 View Post

Anyone know the starting voltage and RPM of these fans? I would also like to know the lowest running voltage and RPM.
Quote:
Originally Posted by Tator Tot View Post

Here are the specs
Max Airflow: 1.95 m³/min
69 cfm
Max Static Pressure: 28 Pa
0.113 inH2O
Noise: 29-30 dB
Speed: 2150 rpm
Voltage: 12 V
Operating Voltage: 5 - 13.2 V
Current Rating: 123 mA
Current Starting: 530 mA
Operating Temperature: -10 ~ +60 ºC
Dimensions: 120 x 25 mm
Weight: 200 g
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post #2202 of 2446

I already have all that info, but thanks for trying to help. Note: Operating voltage is not what i'm asking for, and the starting voltage is usually different.

post #2203 of 2446

They'll start at 3-5v, depending on the individual fan.

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post #2204 of 2446
Very anxious and excited for the completes! Updated FTWPC with my new address so hopefully they get that.

Now just keeping fingers crossed.
post #2205 of 2446
Quote:
Originally Posted by ehume View Post

They'll start at 3-5v, depending on the individual fan.

Any idea on the RPM range for those voltages? And I'll assume you don't know the running RPM or voltage ranges.

 

I'm really hoping all my fans can go down to 700-800 RPM.

post #2206 of 2446
I had mine start running at 2.6V since it was being run off a Pic24 microstick. I'm not sure what the current rating was, since I did not measure it and my classmate kept the microstick.
    
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post #2207 of 2446
Quote:
Originally Posted by nawon72 View Post

Anyone know the starting voltage and RPM of these fans? I would also like to know the lowest running voltage and RPM.
I recommend you get the Lamptron Touch if you are going to control these fans. With my Touch, I can slow the GT-2150's down so low that the tach wire isn't even reporting RPM anymore. The tach wire stops reporting RPM around 300 RPM while the fans get as slow as around 150 RPM.
But for all practical purpose, I wouldn't run my fans at anything lower than 800 RPM.

If you are going to run your fans off of a resistive controller like the Sunbeam or Aquaero, those will produce a lot of heat in the process of slowing down your fans and I don't know that a resistive controller can get the fans as low as a Lamptron can.

Cheers,
PepeLapiu biggrin.gif
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post #2208 of 2446
[/quote]
Quote:
Originally Posted by nawon72 View Post

Any idea on the RPM range for those voltages? And I'll assume you don't know the running RPM or voltage ranges.

Operating Voltage: 5 - 13.2 V ...... that's the voltage range.
2150 RPM ........ that's the running RPM at full speed
Quote:
I'm really hoping all my fans can go down to 700-800 RPM.

Pretty much any fan controller you use should be able to slow down the GT-2150's down to 800 RPM.
At 12 V they will spin around 2150 RPM if you slow them down to 5 V (the minimum rated voltage) that would bring the RPM down to around 900 RPM but you should be able to run them a bit slower than that.
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post #2209 of 2446
Quote:
Originally Posted by PepeLapiu View Post
I recommend you get the Lamptron Touch if you are going to control these fans. With my Touch, I can slow the GT-2150's down so low that the tach wire isn't even reporting RPM anymore. The tach wire stops reporting RPM around 300 RPM while the fans get as slow as around 150 RPM.
But for all practical purpose, I wouldn't run my fans at anything lower than 800 RPM.
If you are going to run your fans off of a resistive controller like the Sunbeam or Aquaero, those will produce a lot of heat in the process of slowing down your fans and I don't know that a resistive controller can get the fans as low as a Lamptron can.
Cheers,
PepeLapiu biggrin.gif

Wow, that's low. I would have been happy if they ran at 600-700RPM. But Anything below 600RPM is almost pointless on a heat sink or radiator, unless your in an extremely quiet room and need it to stay that way. Maybe for a case fan it would be fine.

 

I'm going  to be using my Sunbeam Rheosmart 6, or an Aquaero to control the fans automatically. Hopefully they can get the fans down to 700RPM.

 

Quote:
Originally Posted by PepeLapiu View Post
Pretty much any fan controller you use should be able to slow down the GT-2150's down to 800 RPM.
At 12 V they will spin around 2150 RPM if you slow them down to 5 V (the minimum rated voltage) that would bring the RPM down to around 900 RPM but you should be able to run them a bit slower than that.

900RPM is just what I was hoping the starting RPM would be. Anything higher would be a bit too loud for when I want silence, and lower would probably be inaudible. I think I should have enough fans that start at 3-4V, so I can run them at 700RPM without an issue.


Edited by nawon72 - 5/8/12 at 1:03am
post #2210 of 2446
Here is the thing with resistive controllers: let's say your fan uses 12 V at full speed. Let's say you want to slow it down to half with a resistive/undervolting controllers: the controller will still use up the full 12 V from the PSU. It just burns half of it, turns it into heat inside your case. And sends the rest to the fan.
So, the slower you want your fans, the more volts those controllers will turn into heat inside your case

And that Aquaero is just too funny: a waterblock on something that is supposed to help you cool your rig? Ha! No thanx for me!

I've had a few resistive/undervolting fan controllers and now that I got the Touch, I would never go back to those weak-ass heat producers.
I've ended up burning virtually every fan controller I've touched. Have you ever seen smoke coming out of your rig when you try to slow down too many fans too slow? I have, not a good feeling to look at a smoking case.

But this one produces no heat at all, it controls my fans via a PWM technique which uses only the power it needs without turning anything to heat. I hear the NZXT line is not bad either and they do look real good ......... no resistive/undervolting/heat-score there either.
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