Has anyone researched coil whine to understand exactly what causes it? I had previously concluded that coil whine was directly related to voltage. I Have an Abit IN9-32x Max which I ran two cpu's on. One was an e6300 and the other an 8400. I have discovered that the motherboard makes no noise if I leave the cpu voltage on "auto-detect" but the second I attempt to manually adjust the voltage the coil(s) begin that annoying buzzing/electrical sound. What makes this strange is that the e6300 auto-detect voltage is higher than that of the e8400 yet if I attempt to manually set the 8400 to the same voltage as the 6300 the noise kicks in. I've heard people suggest that perhaps it's only certain frequencies that cause this but I've tried multiple frequencies beyond these chips ratings and they ALL cause the whine. I'm at a loss and all the discussion I've seen on this topic all end with no answers. Has anyone else had experience with this issue?