Re: high pitched/loud processor
If you suspect the power supply is making the sound and it's hard to isolate it, I would take out the screws and take it out of the case. Set it outside the case somewhere with every plugged in. Then power it on. It will be more obvious now if the noise is indeed the power supply.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?