After multiple builds.. multiple sound cards.. onboard audio and external devices.. Only two things fixed my noise.. To start .. the noise is light during normal desktop use.. when games kick on the noise goes nuts and its a loud hum/buzz from my JBL Book shelves. Both units do it. I never had issues with my Kliplsch but it was a very different setup. Only thing that fixes it is a Ground loop isolator installing between the PC and speakers inline RCA. This however is having some effect on audio quality. There is some sort of ground loop issues going on. The only other thing I have thought of that might help is removing the ground pin on the book shelves. I''m lost. Even USB DAC's that are external had the same noise. The only unit that did not was the TEAC USB DAC I had for a little while. Does anyone have any ideas? I am using the onboard audio now on my Gigabyte Gaming 7 X470 and the noise is there. Even owned 3 different video cards and 3 different motherboards. Frustrated.. and stuck..