The video card helps. Its with the video card that you can choose an output for the monitor and as long as the monitor can handle that output, away you go. I have the ATI 8500DV card. It is capable of 85 herts at 32 bit color in win2k and goes to about 120 herts in ME. (driver capability). Just so you know, 600 herts, or cycles, is a similar frequency to what various internal organs resonate at, especially the eyeballs. So, if you have your monitor set to 60-65 you will find that your eyes begin to resonate and hence, vertigo. Overhead florescent lighting runs at that rate too so monitors set to that frequency resonate with the light and 'flicker'. You have to get a frequency that is offset from this to avoid the resonance and that usually means above 72 on the monitor. Sensitive eyes, like yours, can still cause you discomfort even at 85. My thoughts are that you need a high end video card and a montior that can handle it. I agree with the above comments that the color setting is likely not the culprit, but hey, I'm no medical doctor. By the way, this is why helo pilots have to fight fatigue because the main rotor on some helo's spins at the resonant frequency for various internal organs like the eye. I learned this when I was a helo mechanic doing rotor balancing (exacting work was appreciated by the pilots) and I experienced this when I became a helo pilot. You would have enjoyed riding in my choppers cuz I kept them perfectly tracked and balanced.