I have "Cooler Master V750 - Compact 750W 80 PLUS Gold Semi-Modular PSU".
When I connect it to power cord I am getting a buzzing noise similar to this.
When I switch-off the on PSU power button I still get the same noise.
I am already using a surge protector and my electricity connection is grounded.
I am not using any PCI GPU.
Is this coil whine? I have just purchased a new GPU which will be arriving in ~November. I don't want to damage it.
What should I do now? Product was bought from amazon and it's about a year old.