Car X 4K Performance

[ProVegaGamer]

So if i set the game to Ultra settings, Max out with Monitor blur on, at 2650x1440p i get easy 50-60fps. Soon as i set it to 4K resolution 3840x2160 it drops down to 28-32fps.

But yet i can play Forza games at 4K and get above 60fps max out. Is something wrong with Car X Performance?
also FX upscaling is missing.