Corsair SF750 Watt PSU pulsating noise?

[ozzpala]

Got a Corsair 750 watt PSU all running fine however ive got some strange resonance that ive narrowed down to the PSU. Best way I can describe it is a pulsating humming noise. This is constant as soon as the Computer is powered on until its turned off. This a common trait with these sfx psu's or do I have a dodgy fan?

[Deli]

I've never heard any noise from mine.

[jonnyGURU]

11 minutes ago, Deli said:

I've never heard any noise from mine.

Have no idea what you're talking about. 

 

Can you describe what you mean by "resonance"?  There's no moving parts in the PSU other than the fan, but if it were fan noise, it would change with fan speed.

 

[Gorilla Warfare]

It's usually a case fan not the PSU.