Not here apparently, the Codemasters I loved is probably no more...
I have a nvidia one, but I've seen people with pretty much any card reporting the issue.
I do get the compilation stutters after reinstalling the game and clearing the DX cache, and to a lesser extend after uptading drivers. They happen once or twice on specific locations but then they're seemingly gone...
Your problem must have to do with some AMD driver settings for shader optimization, I would check for something like that.
But what I'm referring to, is that at every service area, or stage start, the vsync seems to lock the game under 60fps, feels like 30 (but fps counters report 60). I have to get in and out of the basic graphics menu for it to work properly, as if settings were reset.
It does work for a while, maybe even for a couple stages, but then out of nowhere, at the start or mid-stage it just stutters and locks the fps back to what seems like 30 or less... At first I thought it happened where the compilation stutters usually happened, since the fps drops no matter what then, but could never reproduce it on the same place. Sometimes it runs perfect, others it f's it all up.
Regular vsync does drop to 30 when the fps dips bellow 60, but usually doesn't lock it there for the rest of the stage... (Shouldn't dip either since both my GPU and CPU never get even close to 100% on a locked 60, but UE4)
And since I'm able to get runs where it works flawlessly, it's neither performance related nor shader related, at least on my end. It's 100% a vsync implementation issue. Without vsync my fps never dips bellow 70, with everything on ultra (except crowds/reflections), but that feels awful on a 60hz tv...
There is probably a parameter setting I can use to force something similar to adaptive sync instead of whatever that vsync is, where it disables it once it dips bellow 60 (for UE4 reasons apparently) and just goes back to normal once the fps goes up...
Which should be never after shaders compile.
Obs.: Sorry for the dissertation, I'm fed up with hoping in to get a few minutes of flat out rallying, and then spending a hour fiddling with multiple settings until I think I fixed it, so that the next time I can just hop in and play. AND THEN JUST DOING THE F'N SAME SHT AGAIN... AND AGAIN... AND AGAIN... Some might say thats the definition of madness, and holy moly am i mad now
I have a 165Hz monitor, so I cap my fps to 162, below the refresh rate, so it's super smooth when it's not stuttering. But for me its not help, when i complete a stage like 10x times. When I restart the stage, then I have stutter every time at the same spot, same corner. If I drive like 20km/h then still stuttering... If I cap my fps to 60, nothing change, still have the issue.
Different settings in my AMD driver, 0 improvement.
EA not want to fix this....
On your end it does seem to be either shader or draw distance related, or just the apparently known transversal stutter when UE4 loads the next section of the track...
Seems that maybe disabling Hyperthreading or setting the affinity for fewer or specific cores of your CPU could help, but I dont know... Good luck with that! (Realistically UE4 can't really fully utilize more than 4 cores...)
They either don't want to fix these issues or can't. They could at least be clear about it... Mine is just the vsync for f sakes.
I disabled my E cores, because it's better for gaming. But only this game struggling with this issue, so I don't think it's a PC issue.
If the ACC work fine with the same engine, then it's a optimization problem of EA.
