I have to check my driver more deeply but thanks for your help, I appreciate!

One more question: Does the GTX460 2gigs by sparkle was lauched in USA ? (Im french)

Yes sure at 100%

I really don't understand why the performance can be so irregular. I can launch game by steam like portal, HL2 etc without problems (but with less performance than Seven) but cannot use Octane render correctly.

We know that graphics acceleration on OSX is very odd (performance ...

Hello,

I have just tested the demo version of octane on both OSX and Seven. (I use OSX by the Efix BPU on a I7 920 with a GTX275 and 6gigs of ram)

In Seven i have the performance that i should expect, but in OSX...the render is damn slow (for example i cannot move the camera)

It's like i have ...