I have a G5 1.6 with 1.2gb of ram. I also have a Viewsonic A90f+ 19in. display. And I can't figure out why I can't run it at any resolution higher than 1056x792. I can only assume the nVidia GeForce that come with this machine can run a 19in display at higher resolutions than that. (I should note that reducing the bit depth or the refresh rate don't help at all.) What's going on here? Anybody have an idea?