Hi...
Have you tried changing the resolution using nVidia control panel?
I never had such a problem so i'm not sure about what to do but i am yet to see a monitor that requires drivers, maybe some might have but as far as i know windows always detects them right, especialy Win7 that has a huge driver database... so i believe this is an OS related problem and not a video card or monitor fault...
But i'll check that monitor and see what i can find... in the meanwhile try changing the resolution using nVidia control panel, if you are still unable to get the resolution you want check below the resolutions available on nvidia contro panel and you'll see an option "personalize" or at least it should be something like that (mine is in portuguese), click there and you'll get to a new menu with resolutions to select, then make sure you check the box to unlock unsuported resolutions that appear bellow and you should be able to get the resolution you want, but this shouldnt be needed... anyway, if your monitor supports that resolution it should accept it with no problems but if it doesnt dont do nothing for 15 seconds (especially dont press enter or the space bar) because a dialog box will appear informing you that the resolution has been changed and asking if you want to keep it for 15 seconds, if you dont do nothing than at the end of that time it will go back to your previous resolution but if you press enter or the space bar you'll need to restart your pc in VGA mode otherwise you'll get stuck with a black screen...
Sorry for the bad english...