Is it normal that my Seasonic X-400 SS-400FL has coil whine?

PSUs: The source of DC power for all components in the PC & often a big noise source.

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Is it normal that my Seasonic X-400 SS-400FL has coil whine?

Post by resistante » Thu Oct 25, 2018 6:59 am

When I have my ear next to the back of the case (where the power cord goes) I hear loud coil whine. In this ear position it's difficult to distinguish Intel box cooler (even at its highest speed) from the PSU. In comparison to 90-120W laptop bricks it's louder and much more rich in detail, laptop bricks just buzz, but Seasonic plays a symphony of various different constantly fluctuating buzzing tones. Is this level of coil whine normal for this PSU or an indicator of approaching failure?

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Re: Is it normal that my Seasonic X-400 SS-400FL has coil wh

Post by CA_Steve » Thu Oct 25, 2018 8:27 am

Is this a recent thing? Did you change any components? It tends to be an interaction between motherboard/settings and gfx card.

Seasonic went through a couple of generations of PSUs that seemed to be more susceptible to whine than others. This thread might help.

That said, I've never had an issue with their supplies.
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Re: Is it normal that my Seasonic X-400 SS-400FL has coil wh

Post by Abula » Thu Oct 25, 2018 8:49 am

For some it has coil for others it doesn't, a lot has to do the amount of power and components you have connected. Mine i can only hear a slight electical noise if i put my ear right next to the PSU opening, 1mt away i cant hear anything.

In case you want to replace it, i just bought SilverStone Technology SST-NJ450-SXL Small Form Factor 100% Fanless Fully Modular SFX-L 450 W 80 Plus Platinum Power Supply, i coudlnt hear any electrical noise outside the case, loaded inside the case i cant hear anything either.
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