I have my gtx 760 sc connected to my tv via an hdmi. the audio on it changes wildly like it will get really low and then get higher but the levels on the pc and tv stay the same. also occasionally the sound gets extremely distorted and i have to mute the pc for a few seconds to stop it. I have reinstalled the drivers from nvidia and also reinstalled windows and reseated the card and nothing has worked. I've tried 3 different HDMI cables and they all do the same thing. Anyone have any suggestions?