The video card will support a certian resolution but it's the monitor that has the restriction and when you look in the control panel at the monitor it will give you the resolutions that the monitor supports. If 1024x600 is listed as the top resolution that you can select then that's it. If the monitor supports higher than that and the video card does not then it would be the video card that's the cause of the restriction. Either way you have to have both the video card and the monitor supporting a resolution in order to have a high resolution.
ok thanks on more question then my wife likes to play the games on game fish and when she downloads it all she gets is a black screen all i can think of is its resolution is there anyway to change this