For just display purposes, almost any video card available in the market will be good.. If your needs have the keyword gaming included, then you need to start looking at single high end video cards or multiple GPU setups..
no, your card supports 2560x1440 (actually up to 2560x1600), i'll bet what Timop was right about asking about the dual link dvi cable (ie you weren't using one)
No, the problem turned out that the card did not support the 2560 x 1440. I switched to a different card with that resolution and connected the card to the monitor with a "displayport" cable. The dual link dvi would not have worked since the card it could attach to did not support the required resolution. From what I've read, thus far, both the monitor and the card must specifically support the 2560 x 1440 and require the "displayport" connection. I haven't come across anything that indicates dual link dvi could carry the 2560 x 1440.
I have a similar problem.
I recently bought a Dell U2711 (fantastic!) and I'm trying to use it with Win7 at full res connected to my PC with a Geforce 6200 ( GV-N62256DP2-RH ) which according to the specs should be able to handle 2560x1600. http://www.gigabyte.com/MicroSite/116/standard_modes.pd...
For some reason I can't go above 1920x1200 even with the DVI-DL cable provided with the monitor.
What puzzles me is that if I check "List all modes" in Windows I cannot see anything listed above 1920x1200.
Anyone has experience with this ? If it officially should support 2560x1600 does it mean that it will also manage 2560x1440? (It is lower res, but maybe a less common aspect ratio)