I just added a MSI R4650 video card into my MSI motherboard so that I can connect my PC to my Onkyo receiver via HDMI. I have picture but no sound and have googled and read posts for about 4 hours now and nothing has helped. I want sound through my HDMI and my cable is good as I tried it with my DVD player and all was good. Looks like the sound should automatically play through the HDMI but it doesn't. I don't know what my default sound device should be, but it says "Realtek HD audio output" in the control panel as my default device and nothing else is available. Man something so simple and 4 hours later I'm still not watching tv. Someone please help.