Disconnect the psu from the rest of the machine and plug it in . If the noise is in the psu then RMA it
If its not then take out the graphics card , but connect everything else [ ie motherboard ] and if you get the noise RMA the motherboard
If its still not humming and you connect the graphics card and it starts then RMA the graphics card
If you get it all back together and its not making a noise you are very lucky and should by a lotto ticket
I pulled everything off, including all i/o cables and it still buzzed. I then removed it from the case and placed it on the anti-static bag that it shipped in. Still buzzing. I'm going to try calling in tomorrow before work to see if customer service can think of anything.
If I have to send it back I would actually like to get a different board back. I originally wanted to get the full atx version but didn't think that the built-in bluetooth was worth the extra $50. Had I known that the full board also has an extra on-board 4-pin fan plug then I would have gotten it for sure.