You can unlock the fps in the menu, but it's still locked to a max of 200. I guess I can live with 200fps but it would be nice to see how fast it can go. When I record with fraps the frame rate drops to 150 to 190 for me. However I have mixed results recording Black Ops game play. I really need a dedicated capture card.
Game had Vsync enabled, so I turned it off. Now getting framerate anywhere from 100 to 250 fps. Fluctuates more now, but I like the higher framerate. Got my best score testing in a map after I turned Vsync off.
And yes my monitor is running at 50 Hz. Bad for the eyes? Only other choice I have is 60 Hz.
At 50Hz you should see the flicker clearly, yes very bad for the eyes imo. Go to 60Hz or even try find the specifications of your monitor as a lot of them will go to 70-72Hz with the proper driver installed.