I have a Diamond Viper II Z200 video card with a Samsung 950p monitor. Every once in a while, after I reboot, My screen flickers ever so slightly. If I reboot again, it usually goes away. I believe it is because the refresh rate gets screwed up somehow. Anyway, this leads me to my question. How do I manually set the refresh rate with this card? I can't seem to find a place to do it with the software that came with the card. Thanks.