I have suffered from the dreaded coil whine noise that eminates from the MOSFETS on some of these motherboards. I have tried the BIOS updates, disabling all the C-States in the BIOS including disabling EIST (Speedstep). I have also locked the VCore and various other supposed fixes none of which eliminated the problem.
Now I have found a true fix which is cheap and effective. Go to Maplins in the UK, RadioShack if you are in the US and purchase a GROUND LOOP ISOLATOR (Pictured Left). This has eliminated the buzzing coil whine completely, which is nice 🙂