Could the mobo actually cause coil whine? I'm trying to figure out a coil whine problem even though its more like a buzz then a whine. I've RMA'd my graphics card twice. ive checked my fans, and I now have a new PSU that I haven't tried yet I thought it was the PSU because I only have a corsair 430w with an athlon x4 760k and an Asus r9 270x. Asus says the minimum is 500w so i thought it might be that. My card buzzes when under load such as playing a game. It also buzzes when I'm in the bios settings, After about 10 seconds but it doesn't whine when in windows only under heavy loads. Could anyone give me any insight?