My BenQ's 21.6-inch LCD with 1680 * 1050 can not display the desktop!

My FX5200 128M graphics card is an old card, the latest boy Fantian see on the LCD or buy a G2110W.21.6 the BenQ-inch LCD.Graphics, the control center to write the best resolution is 1680 * 1050.But by 1680 * 1050 resolution, when we can not show the desktop, which depends on the place must use the mouse to move in order to look at the whole, has been pondering for several days can not find the results.1440 * 900 with completely normal.Driven graphics have been updated to Up-to-date, or not.I am using the DVI connection lines can not zoom.How do ah? Prawns you have.Is not the card itself? Or set up my problem?

do not have any problem.FX5200 128M graphics card is old, this card is the highest resolution 1440 * 900.My card is like you.is the highest 1440 * 900 resolution.If you want to 1680 * 1050, not 1680 * support for the 1050 graphics cards.Your motherboard does not support graphics cards support 1680 * 1050.Support changing the 1680 * 1050 computer.