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  #1  
Old 06-18-2020, 08:27 PM
afabrikant afabrikant is offline
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Default RM750x noise

Hi. A month ago I bought the new power supply unit. The only reason why I chose this particular one is its color - just matching the design idea. Did not care about gold/platinum.. cuz the PSU for $300+ is ridiculous.

After a few weeks, it started buzzing louder and louder, so now it producing noise at ~40db in the room. Not much. I agree. But it's so freaking annoying! And I don't know, how to deal with it: can I return it, or fix? Did anyone deal with this kind of issue?

Check out my video, where I'm showing how it looks and sounds like


Thanks. Sorry for my English - I am not a native speaker.
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  #2  
Old 06-18-2020, 09:39 PM
Vegan Vegan is offline
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My HX1000i has a zero fan feature because it is 80 plus platinum so at idle the fan is off so zilch for noise

same for my video cards, fans come on when there is a load
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  #3  
Old 06-19-2020, 03:26 PM
jonnyguru jonnyguru is offline
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Quote:
Originally Posted by afabrikant View Post
Hi. A month ago I bought the new power supply unit. The only reason why I chose this particular one is its color - just matching the design idea. Did not care about gold/platinum.. cuz the PSU for $300+ is ridiculous.

After a few weeks, it started buzzing louder and louder, so now it producing noise at ~40db in the room. Not much. I agree. But it's so freaking annoying! And I don't know, how to deal with it: can I return it, or fix? Did anyone deal with this kind of issue?

Check out my video, where I'm showing how it looks and sounds like

https://www.youtube.com/watch?v=Yyxy...ature=youtu.be

Thanks. Sorry for my English - I am not a native speaker.
That is NOT normal. There is no way that PSU should be making that much noise.

Is the power outlet the PC is plugged into Earth grounded?

Do you have something else on that same circuit that could be introducing EMI? Like a fluorescent light?
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  #4  
Old 06-22-2020, 12:28 AM
BenchAndGames BenchAndGames is offline
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Well thats just a coil whine nothing can do about it, just learn to live with it.

I mean, every single PSUs, video cards, motherboards have coil whine, just some very inaudible, and others very loud.

This is not affecting the hardware in anyway, not performance, not lifespan, anything, just can be anoying , thats it.

My RM750 v2 has to coil whine on loads...also my VRM from my motherboard...but thats ok,
its just part of the desing, the condensadors are vibrating, and thats what produce the noise, thats it.
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  #5  
Old 06-22-2020, 01:21 AM
jonnyguru jonnyguru is offline
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Originally Posted by BenchAndGames View Post
Well thats just a coil whine nothing can do about it, just learn to live with it.
Coil whine at 40dB is NOT normal.
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  #6  
Old 06-22-2020, 01:02 PM
LeDoyen LeDoyen is offline
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That kind of noise is the magic smoke hitting at the door trying to escape..

Sounds like 120Hz hum.. probably a fluke on the primary, clearly not normal
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  #7  
Old 06-29-2020, 11:48 AM
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Quote:
Originally Posted by LeDoyen View Post
That kind of noise is the magic smoke hitting at the door trying to escape..

Sounds like 120Hz hum.. probably a fluke on the primary, clearly not normal
Seems that a filter on the primary bridge regulator is not filtering out the noise fully. After the bridge the sine wave is now doubled on the positive side. Then it is fed to a capacitor.

So a capacitor on the main input is damaged most likely.
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