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  #11  
Old 11-25-2017
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If you're talking about fan life span: The fan is already going to outlast the rest of the PSU.
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Old 11-25-2017
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And compared to other bearint types, will it be different? Better or worse than other bearing like the FDB, Ball Bearing or Rifle Bearing.
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  #13  
Old 11-25-2017
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It would be just as quiet as an FDB or Rifle. It would just last longer.
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  #14  
Old 11-25-2017
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Well it depends which FDB or rifle fan of course, compared to a be quiet! Silent Wings 3 then agreed, but not when compared to a Hong Hua or Martech FDB fan.
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  #15  
Old 11-25-2017
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Doesn't Enermax put fans in their PSU's with magnetic bearings?
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  #16  
Old 11-25-2017
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Quote:
Originally Posted by Stefan Payne View Post
aren't maglev bearing fans better for semi fanless units than Rifle and FDB Things??
They're better than all other bearing types flat out. Circumstance doesn't really matter. They have less friction in operation compared to the rest with no oil evaporation to worry about and less moving parts than a 2BB fan.
MagLev purely exists on the top end of stack with it's major downside being the cost. Which is why you really only have seen them in server use before, slide a few MagLev's sold through water-cooling sites for enthusiasts.

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Originally Posted by ehume View Post
Doesn't Enermax put fans in their PSU's with magnetic bearings?
Enermax' Twister Bearing is a "MagLev Lite" sort of thing.



The key difference in Enermax' Twister bearing is they actual do use a lubricant for the spinning ball that rotates at the top of the shaft. A traditional MagLev (like Corsair's offering) doesn't have or need lubrication as there is no contact between moving parts.
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Old 11-26-2017
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The SSO2 of noctua it's in par with enermax twister?
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Old 11-26-2017
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Quote:
Originally Posted by none77 View Post
The SSO2 of noctua it's in par with enermax twister?
SSO2 is on par with a proper fluid dynamic bearing.

I would hold a proper FDB in higher regard than a Twister bearing. That's partially down to personal experience as well as observed experience of other users.
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  #19  
Old 12-05-2017
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You don't want to use a magnetic levitation fan such as Corsair's ML series in a power supply due to PSU's using voltage control in order to adjust the speed of the fan. Running maglev fans under 8-9v causes a reduction in the magnetic field used for the bearing and there could be issues especially if running the fan inverted (label up).


Here is a bit of what i'm talking about from Thermalbench.

Quote:
The fans hit an average of 762 RPM at 3.6 V before shutting down, and even here it was inconsistent among the 4 samples. Restarting voltage once shut down was between 4-4.2 V for the various samples. Aside from the shorter range of operation, there are 2 other reasons why you may not want to do voltage control: (1) the LED brightness will be affected for the LED models, and (2) the MagLev bearing will not work well lower than 8-9 V with the bearing not levitating as it should. Without long term testing at lower voltages, I can’t say what the effect of this will be but I do not want to find out for myself and neither do I recommend you do so either. Please- stick to PWM control here.

(Edit: July 13, 2016- I noticed a few people misunderstanding what I meant above. The bearing suddenly does not become a sleeve bearing and be prone to issues under voltage control. Sleeve bearings also are not a particular item that goes bad at a particular time but that’s a discussion for another time. I am trying to refrain people from using voltage control here as the electromagnetic field generated that helps levitate the bearing will be powered via a constant 12 V when using PWM control. If using voltage control, the strength of said field will change and effect the nature of the fan. Given this is advertised as a PWM fan, I am reviewing it as such and so I have no issues with any potential issues under voltage control. Neither should you. If you use voltage control for whatever reason despite my recommendations, please try to stick to 8-12 V or so. I went even below and found no audible issues even till 5 V but again I do not recommend it.)
edit: added link

http://thermalbench.com/2016/07/12/c...-120-mm-fan/3/
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  #20  
Old 12-05-2017
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Not all power supplies use Voltage control and many of the higher end units do use PWM control.
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