I've just invested in a Viewsonic VP2770-LED which has a native resolution of 2560x1440 @ 75Hz. I'm using this on win7 64 bit systyem with an AMD Radeon 6800 HD card running driver version 12.104.0.0000.
I've installed the Viewsonic driver 220.127.116.11 - latest for the screen and have only this screen on the system.
Although the Catalyst Control centre states the screen has 2560x1440 @ 75Hz capability the highest resolution offered for the desktop is 1920 x 1080 @ 60Hz and to be honest at this res it looks worse that the 2365 it is to replace :-((
Any ideas how I can obtain the required res????