Let's keep it structured: Run the DX9 branch using a uitility like FRAPS benchmark mode. Record a section of gameplay in benchmark mode (pressing F11). Switch to DX11 make sure to be in the v1108-dx11-open-beta branch (the one with the latest updates).Do the same thing (same car, track, same conditions, etc..) with DX11, and record in benchmark mode the same situation with FRAPS. Use same graphics settings, MAKE SURE POST PROCESSING IS SET TO NONE IN DX11. Please post attaching the benchmark files if your frame rate in DX11 is lower than the one in DX9. We will investigate the specific issues from there. In DX11 build if you can attach also the perf log. Thanks a lot.