>>>> I've [...] set the screen res to 1920x1200 [...]. [...] I've achevied 293 FPS

>>> Wow! 293 fps

>> it was the OSX version

> What resolution are you using in OSX?

;-)

> >400% difference

It's 293/70-1 ≈ 320% difference (as 100% difference means twice the speed) :-)