It appears that someone on another forum with a very similar setup fixed their issue though a bios setting. http://www.gearslutz.com/board/music-computers/473245-calling-all-gigabyte-mobo-users.html
Originally Posted by Animus
I think all you have to do to fix it is turn off all the c1 halt/eist/speedstepping which is fine since you really shouldn't have that stuff on for a DAW anyway. I have a gigabyte board, corsair psu and a i7 and never get the coil whine.
I had that awful sound over my monitors whenever there was I/O activity of any kind (wireless, USB, FireWire). Disabling C1 completely fixed it for me, and like others have mentioned, you should disable EIST and the C states anyway for consistent audio performance.
Board: Gigabyte GA-EX58-UD5
Proc: Intel i7 950
Power supply: Corsair 650HX
will try this tonight and report back