You did not understand my last post . I do not hope for a second that the performance is BETTER than dx9. Just that it is roughly equivalent to the same graphical effects / equivalent resolution / AA is almost equivalent (difficult to know precisely at what level AA corresponds AA level 5 under dx9) / the same values of algorithms various (eg real time) etc etc. with the same car, the same circuit, at the same time with the same weather.). In short absolutely everything of the same. The difference in FPS with almost equal visual quality on all aspects is enormous. Really huge. We can not surely realize with a recent GPU has more than 500 euros nevertheless ... still happy. What I approach (and the guy just before) the "new graphics engine" has been the opposite of a "healthy", powerful and optimized graphics engine. As the stable and constant fluidity is a PRE-REQUISITE for a real simulation, this expectation is at once urgent and especially totally legitimate. And because you misunderstood my message I say again : No one here looking to have a performance better than dx9, just a performance ***roughly*** equivalent to similar visual quality. I hope I have explained better here.