Every time I install a new video card, I have to adjust the settings on the monitor. I have to do it for every resolution (1280x1024, 1024x768, 800x600 at least) and refresh rate (70, 75, and 85 or higher.)
It used to be if you just changed the direction the monitor was facing (east versus north for example), you would have to adjust it. Don't know if that's still true or not.