I seem to recall that I couldn't get a decent resolution, or decent quality out of it. The VGA connection was better. Reading the manual for the TV implied that it didn't accept DVI-D inputs, even with the dongle, over the HDMI input.
I understand this as meaning your TV has an HDMI port to which you connected the DVI output from the PC using an adapter.
PC (VESA) timings are different than consumer HDTV timings and not all TV sets will accept them.
It's possible the card was outputting the standard PC timings and not what the TV needs/wants. You'd think the video card could get all the necessary timing details from the TV (from EDID), but that won't always work anyway (TV could have wrong or incomplete EDID for starters).
The solution here would be to use a program like PowerStrip to create the custom resolutions/timings you need for your TV and then use those for output. So long as the card can produce those, you should be good to go.
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