Today I found out that some piece of hardware was making a popping sound. I found out right now that it was my desktop plug that was connected to my surge protector. Whenever I turn my PC on, there would be electrical popping sounds coming from the plug. I just build this computer 3 months ago and it's been working marvelously, but not anymore. Could it be my PSU, I have a corsair CX 600, or could it be my surge protector. The sound goes away when I turn off the computer, so I suspect its the PC. Could it be coil whine? I'm not sure what coil-whine or arching sounds like so I'm not sure what the problem is.