Dx9 triple screen (5760x1080) with 2 x GTX670's in SLI, solid 60fps. Dx11 with same setup I'm getting 35fps. Reverted to dx9 until this is fixed. Also I think the bloom is overdone. Having an option to disable bloom independent of HDR would be good. Or else just scaling back bloom a bit. Regards, Mark.
turn PP off . fixes bloom on Official cars. 3rd party stuff can still be an issue. Read install notes properly and follow to the letter and you should see better results.
Do the benchmark as requested in this topic: : https://forum.studio-397.com/index.php?threads/official-dx9-vs-dx11-performance-difference.55385/ And report your results back to the same topic.
Not ideal if you like weather, but only race under "sunny" skies - you will get approximately 10-40 FPS improvement. I believe there's a known issue at this time regarding the rendering of clouds. On NOLA under sunny skies I'm getting 130 FPS, light clouds 120 FPS, mostly cloudy 85 FPS. Tested with a practice session and no AI (private session), only variable was clouds.
multiview can kill fps also. del player.json, keep a copy maybe! del shaders and cbash folder as per, choose pp none, maybe try latest beta, have to opt in again. "open beta.. not open beta stable has some more options.