You may not have to connect anything to the SPDIF since the sound card is on the motherboard. I just figured that turning on the digital output on the SPDIF may turn it on on the HDMI as well.
Has anybody played with GB-PVR on a Asus M2A-HDMI motherboard at all? I was tempted to get one of these to upgrade to but this new Biostar board looks a lot more appealing.
Sorry for the late reply, I was at the Indy500 and my laptop crapped out on me.
I'm having the same issue as DeepBlueC. As for the Video, the board seems to be able to handle anything I throw at it as long as I'm using the purevideo codec. But I can't get audio through the HDMI. I'm going to play more with it this week now that I'm back, but for now the WAF is being sustained by S-video. (she simply doesn't know what we're missing yet)
I'm tempted to get this board just for the small upgrade on the onboard video. I was going to go with the ASUS m2np-vm or something with the 6150 graphics chip but this one is slightly cheaper and will also allow for an upgraded HDMI TV for later. My only delima is that I wanted to recycle some other IDE hard drives from another PC and it only has one IDE controller and with the Antec NSK400 case I don't think I could get a cable to the HD and DVD so I would have to buy a new SATA HDD.
Getting the HDMI sound to work took a little work.
In the bios you need to enable hd audio and HDMI audio.
Under control panel/ Hardware and Sound. Select configure sound devices. By default the SP/DIF is selected as default. Change to HDMI.
Download the latest forceware drivers from NVIDIA. They just came out with a new version the beginning of June that allows me to get HDMI sound.
After all that work I had to go back to use SP/DIF. My plan was to run HDMI to my TV and have an optical cable run back to my receiver. It turns out that my TV will not pass through Dolby DTS from HDMI to the optical out, It will only pass through 2 channel stereo. So now I have SP/DIF out from the PC to the receiver for the audio and HDMI out from the PC to the TV for video.
My future plan is to get a new receiver that has HDMI pass-throughs then I could run HDMI from PC to receiver and then receiver to TV.