Wanted: 2560x1600

[Michael S Peek]

Hello all,

I've got a user with a Dell 3007WFP-HC monitor capable of 2560x1600.  
Same user has an nVidia Quadro FX 550 with 128MB of ram.

The nvidia-settings tool won't let us do anything more than 1280x800, 
although the card touts that it can do 2048x1536.

Does anyone have any clues as to why this would be?

If a better video card is required, does anyone have any recommendations 
on what would be powerful enough to do 2560x1600 at 60Hz?

Thanks in advance,

Michael