not just Nvidia... this problem isnt just confined to the nvidia cards you all seem to be using, i have an ATI 3870 sitting on a p5q D with an e8400 and 4 gigs of 1066 reaper and i have the same problem, either a max cap of 1600x1200 or it will go to 1800x1440 (the maximum my 21" 1997! dell...