Do I need an upgrade on my video card? Currently I have AMD Radeon HD 6570 and my monitor is a Viewsonic VX2235wm. According to my monitor the correct resolution should 1680X1050 and when I set it it's perfect, all my images are correct in size and dimensions. My circles are circles and not ovals. However this video card won't accept it and changes it after restarting to 1600X1200 which distorts the geometrical shapes. How can I make a proper adjustment so when I set it to the recommended resolution, it stays?