Are you still using this card? Are you using it as a video card or just the TV -HD tuner
section? I already have a Matrox Parhelia and wonder if there is any compatability
or conflict.
Yes, I'm still using it all the time. In fact, I have two of them, one in a machine with a Matrox G400 video card and one in a machine with an Nvidia card. Both of them work great. My brother has one and is running it with a Parhelia with no problems.
The MyHD card can't be used as a Windows display card. It comes with a cable that lets you loop the output of your existing video card to the monitor and when you select full-screen display on the MyHD card, it sends the HiDef output to the monitor, otherwise, it sends the output of your video card to the monitor. Of course, if you have a HiDef TV, you can just hook the MyHD to it directly.
I have one of the MyHD cards hooked up to a 21" Viewsonic P810 computer monitor that is in my office and the other hooked up to a Sony XBR-800 34" 16:9 television monitor in the home-theater. I am able to run both of them at 1920x1080 and it looks absolutely GREAT! I can barely stand to watch regular TV anymore.
You already know that very few HD-ready TV's come with a HiDef tuner, so you usually must buy an external tuner of some sort. There are set-top boxes, but you can't use them for recording like a Tivo, but the MyHD card can be programmed to record the bitstream to the hard drive for later viewing. It takes about 8 gig an hour.
I had a friend that bought a HD-ready TV and called me up to come and see it. He had it hooked up to regular cable TV and stood there and said, "Wow, doesn't it look great? I really like this HiDef stuff!" I told him that he wasn't seeing HiDef TV and said he should come over to my place and see real HiDef TV. He did and ordered a MyHD card off the Internet before he left. He's happy now.