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Other methods to reduce fan noise? c940 14'

2020-02-04, 2:22 AM

(Reposting since original was post misleading with a specific word in the title/post. If an admin can delete my old post I'd appreciate it)

 

So it's obvious that Lenovo designed the right part of below the fans wrong since when you plug it up with something, fan noise is that is normally produced when they crank up at max gets decreased by about 50-60% (imo), but I would like another possible method to fix this as almost 1/4th of the fans below the laptop are blocked entirely to prevent this sound from happening. Are there any other methods to reduce this fan noise or is plugging it up with tape the only way? 

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379 Posts

11-04-2019

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Re: Other methods to reduce fan noise? c940 14'

2020-02-04, 16:49 PM

Hi ,

 

I'm sorry to hear about the experience.

 

Regarding the issue try to access the BIOS and set the System Performance mode to "Quiet" under configuration tab as shown below

 

 

If you do not have this option try updating the BIOS using the Lenovo Vantage App.

Here's a link on how to access BIOS: https://support.lenovo.com/us/en/solutions/ht500216

 

Hope this helps and let us know how it goes,

Jeremy



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Re: Other methods to reduce fan noise? c940 14'

2020-02-06, 3:13 AM
Hi Jeremy, thanks for replying. My BIOS screen looks different from the pic shown above, but I found a similar option in my BIOS menu showing the exact same options you would toggle inside Lenovo Vantage/Fn + Q. While Battery Saver mode does in fact reduce fan noise a bit, I would like to experience less fan noise while in Extreme Performance too as when preforming CPU/GPU intensive tasks, the vents are built in a way that they make a type of sound as if it were a wind instrument, so to speak. Only way I've found to fix this is by sealing the right side of the fan and not the left (since the left this doesn't happen), but I would like another fix to this as I would like for the laptop to not overheat or anything due to a whole fan almost entirely being shut. Any suggestion would be appreciated.
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12-24-2018

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Re: Other methods to reduce fan noise? c940 14'

2020-02-07, 19:09 PM

i tried opening the laptop, and tried using tape in a bunch of different ways but nothing really got rid of the noise. 
I wish the fan itself was replaceable but i don't think it is. The whiney hich pitched noise drives me crazy

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Re: Other methods to reduce fan noise? c940 14'

2020-02-07, 19:19 PM

Since you opened it, do you know if it's the fan itself making the noise? Or is it the vents themselves which just pitch a specific high note? 

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Re: Other methods to reduce fan noise? c940 14'

2020-02-07, 19:28 PM

At first i thought it was the vents, as the whiney noise is somewhat lower without the lid. But it is still there. So now i think its just something about the design of the fan itself.
You can try opening it and see for yourself

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Re:Other methods to reduce fan noise? c940 14'

2020-04-11, 2:17 AM
Did you find any solutions yourself?
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Re:Other methods to reduce fan noise? c940 14'

2020-04-11, 21:07 PM
As of yet nope. Best bet is too seal the right side of the bottom vents with tape (just a bit enough until the high pitch sound of the fan noise is muffled enough) and that's about it. Apart from undervolting, using Fn+Q to toggle Lenovo battery saver and adjusting the Windows 10 battery slider to the left for battery saving, that's about it. It doesn't bother super too much tho but when charging in absolute silence it is audible enough.
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