Hello friends. I recently built my first PC due in large part to the kind people of these here forums (a billion thanks for your help). However, I had to send my first PSU back as it made a loud crack sound on first startup, then continued to make a quiet, high-pitched but soft crackling noise while occasionally just shutting down. I just finished setting up with my new PSU (Corsair TX750M) and though none of the major issues from the last PSU are present, the crackling noise is still there. It's erratic, and seems to be most noticeable when the system is under load. Right now it's not even happening, but it is there more often than not. Is this normal? I can't bring myself to believe two PSU's in a row could have the same problem (though they are the same brand...). Help me Giantbomb!