Holy crap, this is a lot! Covers everything I was asking about and more, I'll have to give these links a looksie thank you so much!

And yeah, I guess that also explains why the buzzing seemed to get worse when I ran an intensive game, and why navigating menus that lowered CPU/GPU intensity lowered the buzzing. Interesting.

Again this is all great info and thanks so much for the response and work you put into it, thank you!