My new fanless Seasonic PSU turned out to be noisy, definitely not "0dBa" as advertised. It is not high-pitched "coil whine" like from some graphic cards, but a much lower sound like in the following videos. (Not mine, I already RMA'd my PSU, but a Google search revealed other people with similar issues).
http://ift.tt/1DVbdsc
http://ift.tt/1DVbbjR (skip to around 40 seconds mark)
Would this indicate an issue with AC power rather than PSU itself? It feels like a different problem from the typical coil whine some complain about, and it also seems rare since all tech review sites I've visited claim these units are silent.
I tried powering it up with a paperclip and also connecting through an inexpensive Tripp Lite UPS (line-interactive), but it still made the noise (perhaps less in the former case if compared to when it's connected to a PC). It never occurred to me until recently that power lines could be to blame because my old PSU never made such noise.
http://ift.tt/1DVbdsc
http://ift.tt/1DVbbjR (skip to around 40 seconds mark)
Would this indicate an issue with AC power rather than PSU itself? It feels like a different problem from the typical coil whine some complain about, and it also seems rare since all tech review sites I've visited claim these units are silent.
I tried powering it up with a paperclip and also connecting through an inexpensive Tripp Lite UPS (line-interactive), but it still made the noise (perhaps less in the former case if compared to when it's connected to a PC). It never occurred to me until recently that power lines could be to blame because my old PSU never made such noise.
What could cause PSU to make this noise?
![Smile.jpeg[Urban Legend]](https://emegasat.blogspot.com/search/label/Smile.jpeg%5BUrban%20Legend%5D){kind=link}
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