ATI has a sound card built into the VC card. I didn't see a second sound tab in the dxdiag so you are probably okay. But to be sure go to my computer properties, then select hardware and then device manager. Check to see if it's ATI's sound is disabled. However, if you never installed the sound drivers you should be okay. My best guess is that you are okay. Like I said no second sound tab in DXdiag.