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Hello, i have just bought a new Seasonic X-760 PSU and there is a problem.

If i put my ear next to the PSU when the PC is on, a buzzing sound, or a whine can be heard. Its not loud and can only be heard when i put my ear next to the PSU.

I know it is harmless but is this normal?

I mean "all the PSUs make this noise and no PSU is %100 silent? Or some make but not do not?

I really want to RMA it