It's all up to the TV. HDMI isn't necessarily incompatible with a computer signal. The HDMI input would have to sync with the PC's transmitted refresh rate and match the resolution. Any DVI signal from the TV would have to be digital, however. Unless you have an advanced card, it's likely to be analog. My guess is that Samsung disqualifies HDMI as a PC input for reasons of copy protection. You could always use the VGA connection between PC and TV, or, if you're a glutton for spending, get a VGA to DVI (or HDMI) adaptor for about $300.

Ed