I upgraded from 21 ich to 32 inch monitor but my Radeon 6950 still only detects 1920 x 1080 resoultion. There's no 2560 x 1600 in catalyst control center or the hp adjust resolution tab.
you might have to update your CCC driver to the latest version 13.9 it is, hope this helps detect 2560x1600
or you might have to go into the CCC settings itself and go to VGA display settings, untick EDID box and set the maximum resolution higher
ps if your graphics card cant support that resolution the screen will turn black and the tv will switch itself of as a power precaution...if that happens...press Esc and it will return back to the way it was before...hope this helps you and helps me too because im getting a 32" too and need to know if the maximum resolution for the 32 inch tv works too
the card i got is Radeon 7750 with the 13.9 driver so if it works, ill keep you informed