2sesame

Hello Smart people, I have a Sony Vaio Rx850 and just installed a GeForce 6200 OC and after reboot the screen is 1/2 inch smaller on all sides. Is this normal? How can I get it back to full size? The Max square has no effect and changing the resolution just increases size of icons, etc. I know it is smaller because I can center the screen on my monitor. Should I return everything to stock including the SiS651 driver, the re-install everything? I just want to play GRAW...