There are mentions of "single link" and "dual link" DVI-D cables. Originally I had been thinking that was for dual monitors, but the information I've got says that is for handling higher resolutions. Specifically with single link cables the limit is suposed to be 1280x1024, while dual link cables are suposed to handle 1920x1080.
The difference is not so much the resolution but the dot clock. DVI-D single link is limited to 165Mhz ("copper barrier"). All above requires dual link, and the maximum is 330Mhz.
However, some hardware does not allow using these bandwidths; many single link cards are limited to 108Mhz (such as the SiS 301 ones).
Thomas
-- Thomas Winischhofer Vienna/Austria thomas AT winischhofer DOT net *** http://www.winischhofer.net/ twini AT xfree86 DOT org
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