I've searched everywhere for someone else with the same problem.
I've heard a comment somewhere, on another site, complaining about the scanline output on the mobo. My 42" LCD TV has DVI and HDMI inputs, and both result in the same borders. I've even installed XP, no difference. So it appears to be the display capabilities of the mobo. It doesn't really display true 1080p. I installed a PCIe video card and it resolved it. I feel kinda ripped off. The point of the board was to build a small, quiet HTPC and now I'm gonna have to pay for a video card that will likely add more noise/draw more power.
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