Hiya guys I installed a XONAR DG 5.1 Sound card the £20 pound a month ago it's been installed with all the latest drivers for the last month absolutely fine no issues. Until today I was talking to someone on skype and apparently when I went into a game of Call of duty he heard a buzzing noise so I went into the properties and listened to device and it was a buzzing noise and as soon as I left the server it stopped the noise, the noise seems to start when graphics card is under load.