Quote Originally Posted by ZAmodeo
I guess I'll try to swap out the power supply with another sometime this weekend. Is it a possibility that an over-rated power supply does odd stuff when it's not being used fully? A 500W supply is surely more than my system needs. I don't know why this would happen, just brainstorming a bit.
No, it's more just a matter that some models will buzz while others won't. I've heard that coil whine tends to be a problem more with PSUs using passive PFC rather than active PFC, but I can't confirm this with first-hand experience.

On SPCR, Seasonic power supplies are highly regarded; they probably won't buzz.