from DDWG.org:
Quote:
Dual Link
Dual Link DVI supports 2x165 MHz (2048x1536 at 60 Hz, 1920x1080 at 85 Hz). A dual link implementation utilizes all 24 of the available pins.
Single Link
Single Link DVI supports a maximum bandwidth of 165 MHz (1920x1080 at 60 Hz, 1280x1024 at 85Hz). A single link implementation utilizes 12 of the 24 available pins.
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so it looks like it's one connector that packs twice the punch.
(the DDWG site says the dual-link DVI supports 2048x1536 but the new 30" display is 2560x1600. hmm)