I have the Gigabyte GA-880GMA-USB3 and can only get 2 chanel stereo via HDMI. Not good for HTPC. Is the motherboard capable of 5.1 via HDMI? If so, how do you get it to ouput 5.1?
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how many channel you've connected? already setup channel more than 2 in audio configuration panel?
Got it working. Appears the Receiver MUST be on before turning on the PC. I guess mother board detects what's connected to it? Anyway setup 5.1 in Realtech's hometheater software and it's working and sounds great!