So i also have the annoying psu noise. What fixed it for me is go into the BIOS and set the cpu fan on always on and set minimum temp at 30 degrees celcius. The noctua fan is almost silent and now the psu does not overheat and the psu fan does not activate. TBF that is unacceptable! You can not advertise a pc as silent and then shipping it in such state.
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