i have same asus vw223b (gts 250)in windows 7 64or32bit cant set 1680x1050 always is 1600x1200,..in windows XP sp3 32bit i set 1680x1050 but in games that do not have the settings for aspect monitor 16:10,16:9, 4:3 ..always is 4:3  and the image is stretched in games, and the monitor is turned off for a second, like  when changing resolution.also in games and on the desktop and when I do not do anything.PLEASE HELP.