Windowed - 60 FPS, Full scr - 30 FPS

Thanks Shambler for that tip. My frame rate never went above 101 fps and I was wondering how to change that.
Now I can see how fast I am really rendering.
I have 10,000 3D Trees on a 128,000 X 128,000 Terrain.
Now it varies from 102 to 220 fps instead of always saying 101 fps.