@ Sprocki

MarK is right.

One of the most important parameters is pixel clock. The first thing you need is to rise it up to the minimum value needed.

Looking at the specifications it is clear that your monitor accepts a pixel clock at least up to 162.0 MHz (which ensures you can get a 1920x1600 resolution). However you may be not able to reach such a value if, previously, you have not set correctly a sufficiently large bandwidth in the monitor specification window.

Since the specifications do not say what is the bandwidth of your monitor, you can set it, as a first approximation, to a value somewhat larger than the pixel clock. Then, stay at 1600x1200 resolution, and try to rise the pixel clock up to 162.0 MHz. If you are still not able to reach this value, go back to the monitor specification window and rise up the bandwith. And so on until you will be able to reach the correct pixel clock.

Now, setting the resolution to 1920x1600 should be no longer a problem.

Good luck.

(Please note that anything you do is totally at your own risk. Modern devices have internal protections against improper settings, but I do not accept any responsability for possible damages!)

[ Edited by DoctorMorbius_FP on 2008/3/14 20:44 ]