When I turn on my computer, the Motherboard makes a high pitched noise

[adkinsbee]

I have an Asus A8N-SLI Premium and when I turn on my computer, a REALLY high pitched noise is emitted from the motherboard. The source is about near the CPU. I do not know what's going on.

 

[adkinsbee]

I recently changed the power supply. It was working before the power supply change, but afterwards it makes this noise.

 

[Shnur]

Last time I've heard that noise my PSU exploded a couple seconds later lmao.
Are you sure it's coming from the board? Is your PSU correctly mounted?

 

[jsc]

If the sound is coming from the motherboard around the CPU socket, it's probably coming from the ferrite cored coils used in the on board voltage regulator.