The longest DVI cables currently available are 5 meters. The standard apparently was not intended for long distances and the reason longer cables aren't offered is that they won't work, although a rep at Molex has told me they're working on a 7 m or 8 m cable (I think). -- Herb
I don't really know, but it seems that a purely digital signal would be less susceptible to degradation in a long cable run that an analog signal would be. I believe you can get away with (analog) VGB monitor cables >25 feet w/o amplification and would expect even longer runs with digital. They'll be much harder to find, however, till DVI catches on.
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