Why do you bother turning Vsync off? Skuzzy and I have discussed this in a thread a long time ago...
You will NEVER actually see the frames the system is reporting. What you see is limited by the screen refresh rate. So, if the game is reporting 200fps and your refresh rate is set at 100 you're only seeing 100fps. And you risk seeing parts of the frames you don't see (tearing) with vsync off.
In other words, your card is capable of displaying those high frame rates, but your monitor isn't.