game timing test

I couldn't use up/dn arrow to get sprites to 15 (it only went in even numbers). But at 16 (1920):

Windowed, DirectX, VWait 1: 60 FPS (75 Hz refresh)
Fullscreen, DirectX, VWait 1: 61 FPS
Windowed, OpenGL, VWait 1: 72 FPS
Fullscreen, OpenGL, VWait 1: 61 FPS

Upon running again, I could only set odd sprite numbers. With 15 (1800):

Windowed, DirectX, VWait 0: 145 FPS
Fullscreen, DirectX, VWait 0: 197 FPS
Windowed, OpenGL, VWait 0: 179 FPS
Fullscreen, OpenGL, VWait 0: 199 FPS

My system specs are in sig below - tests were in Windows XP.