Unfortunately, the thing with XP is the Direct X part of it. When you have 2 monitors hooked up and on “Dual View” there is a glitch, and it cuts your FPS down in half. Making it unplayable.

The solution to this is Horizontal Span. Go to your video card settings and change the display to Horizontal Span ( one whole desktop ) This will move your resolution up to 2560 x 1024.
vielleicht liegts drana?