I use a Audio GD Compass as a DAC connected via USB to my Behringer Truth 2030A speakers.
After I upgraded my graphics card the speakers started to buzz, depending on the main color of the current picture and even the frame rate of games.
This setup doesn't buzz, when I connect it to another PC and as soon as I remove the DVI cable the buzzing is completely gone.
There is no buzzing, when I'm using Linux, which is the reason, I think, that the graphic card is the main culprit.
The whole system draws more power from the PSU, when the graphic card is working, so I'm not completely sure if it isn't really the PSU.
The PSU is a Corsair HX520W, which should be enough for this setup as I'm drawing around 320W 430W from the socket, when I'm gaming.
I'm currently using my Sennheiser HD 650 for gaming because of the high input impedance, which gives me no buzzing at all.
But I also want to be able to use my speakers, when gaming.
Did anyone else ever experience a similar problem with their USB connected DAC and quite sensitive speakers?
Edited by PowerPaul86 - 2/13/13 at 11:33am