Horrible noise when moving mouse!

[Sida]

Whenever I move my mouse I get a horrible high pitched buzz from my computer. I have no idea where it's coming from. The strange thing is, the pitch changes depending on which monitor I have the mouse on. It's not the graphics card as I've tried 3 and all did the same thing.

It's driving me insane!

 

[Sida]

It's not coming from the speakers it's definatly coming from some hardware. It feels like it's been going on for ages, but I switched PSUs with my friend about a week ago and while it feels like longer, it may have started since then. I'll have to try my old one again I guess.