Quote:
Originally Posted by heero_yuy
It's called magnetostriction. It comes from magnetising the core of the transformer. It slightly changes the dimensions and thus makes a noise.
Normally we try to run the PSU's at above 20kHz so users simply can't hear it.
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Does that frequency apply to the poxy Superhub PSUs?
And to interpret your explanation, change of dimension means vibration, the frequency of which defines the noise pitch. The vibration can transmit to other components that in a confined space such as a poxy Superhub PSU, need to be glued into a more stable alignment.
Am I wrong?