1.66GHZ Mac Mini DVI to HDMI worse than VGA??

I recently hooked up my Mac Mini to my new Samsung Series 7 55" LED TV and was disappointed to find that I can't get a better picture from my DVI to HDMI than the regular DVI to VGA what am I missing?
When I plugged in the HDMI I put the display setting to 1080p and the display comes up grainy and colors are almost fluorescent. I tried several other settings, but I still get a better picture through VGA. The DVI output on this model is single link. I am using a dual link DVI to HDMI cable, but this should not matter. Is it possible that this model is not capable of 1080p on this large a screen? Does anyone have any suggestions?
Thanks

Sounds like different settings are being applied on the TV on a per port basis. Many TVs can store settings unique to a particular input. But there are so many settings on that TV, it would be hard to say for sure which ones are causing what you see.
But for sure the issue is not with video coming out from the mini. The mini doesn't "flavorize" video in any way. It just sends out honest bits of video data. It's the TVs you have to watch out for. They have all kinds of unfettered processing possibilities, many under goofy, trademarked names.

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