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RM750x - pulsating low humming noise - very annoying


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Had the PSU since November 2016. It's started making this Pulsing low humming noise, and its definitely coming from the PSU, not other case fans or CPU fans. Its not under load or anything this is just all the time even when idle.


I can tell because when I rest my hand on the PSU box when the PC is on, i can feel a very faint vibration coming through at the same time the noise is made. What can be done to fix this or do I have to RMA??

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