# SM2 power module noise

**URL:** <https://forum.snapmaker.com/t/sm2-power-module-noise/6129>\
**Category:** Snapmaker 2.0 (3-in-1)\
**Created:** [April 18, 2020, 10:08pm UTC](https://forum.snapmaker.com/t/sm2-power-module-noise/6129 "2020-04-18T22:08:40Z")\
**Posts on this page:** 1\
**Showing post:** 120

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**Author:** ![Andomaster](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/andomaster/32/8183_2.png) [@Andomaster](https://forum.snapmaker.com/u/Andomaster)\
**Post date:** [December 24, 2020, 8:58am UTC](https://forum.snapmaker.com/t/sm2-power-module-noise/6129/120 "2020-12-24T08:58:13Z")

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Received my Snapmaker last week and after the first power up I was suprised how ridiculously loud the PSU is. Also designed (yet another) fan bracket for the exhaust fan without the need of modificating the back plate. Thought I might share with you::

> **[Snapmaker 2.0 PSU Fan Bracket by Andomaster](https://www.thingiverse.com/thing:4694528)**
>
> Hi all,
> as the Snapmaker 2.0 PSU is known to be quite noisy I was looking for ways to quiet it down a bit.
> Since most of the existing mods require either modification of the original back plate or need a whole new printed backplate I was thinking of...

Also made a short video for comparison of the stock fan to a Noctua fan if someone who hasn’t received the Snapmaker is wondering what everybody is talking about… 😅

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After silencing the exhaust the PSU wasn’t as quiet as expected so I took a closer look at the power supply. Installed is a 350W “Great Wall” PSU, the venting holes made quite some whistling noise.  
First i thought of printing a new cover but since it is a low profile PSU without much room to the top of the enclosure I wouldn’t be very comfortable with a (thermo)plastic cover so close to heat sources.  
So instead I removed this venting hole part completely and sanded the edges down.

 ![20201222_110301_HDR](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/3/334586ad82008cf5c7e6cdcd9b2e4234f32f6ad7.jpeg)

 ![20201222_110316_HDR](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/0/0a498e79ae45272517abb8c754e563cb462d48a7.jpeg)

Now the whistling noise is gone but still have to replace the integrated fan to quiet it down to a reasonable sound level.

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