For monitor resolution above 1920x1080, you need a DUAL LINK DVI cable

[mouser]

Just a tip for others like me who have managed to live under a rock for the last couple of years, that if you are using a monitor with resolution higher than 1920x1080, you need to make sure you have DUAL LINK DVI cables (not single-link DVI cables).

I mistakenly connected a higher resolution monitor with a SINGLE LINK DVI cable today and the image was all degraded, but there was no error or message telling me why.

For more: http://hexus.net/tech/tech-explained/displays/4455-dvi-single-dual-link/

[Fishous]

Well, not exactly.

Single Link DVI is limited to 1920x1200 @ 60 Hz.

Dual Link DVI can support up to 2560x1600 @ 60 Hz.

With a lowering of refresh rate, you can go higher.

Future proof yourself and only buy dual link DVI cables.

[mouser]

thanks for the clarification fishous.

[Stoic Joker]

Another thing to watch for is the DVI-I vs. DVI-D distinction. DVI-I has the 4 pin analog signal necessary for conversion to VGA, while DVI-D does not.

[mouser]

now i remember why my brain shut down when trying to figure out what DVI cable to buy..

[Innuendo]

Newer is better...right? 

[Deozaan]

Just go for HDMI cables. That will end all your problems as long as you remember to get the HDMI 2.0+ cables!