fps issues

When I just enter the game, everything is good, my fps will stick at 180, but just push any bottom like brake,accelerator or gears, fps will just drop to 20-40 unless I release the button. And this condition just happened in the first lap, if I drive few laps later, it becomes normal, fps will...

Hi all! Kinda new to computers so sorry if these questions are dump in any way, I have shaders pack enabled and havent changed much in it but most of i is checked . Using Sol pp filter In the image posted thats me drifting alone on a coarse If I enable the FXAA im around 80-120 fps? I have...

Im getting weird fps problems lately and its driving me crazy, the fps just drops to like 30fps when i drove to certain part of the track. It not only happen on one ciruit, it happens to all circuit ive tested, the laggy parts are also seems to be random everytime you load up the track. The lag...

I have a 10th gen core i5 processor but i don't know what's happening. I even turned off a lot of custom shader patch's features and minimized the world details. I only play on low grahpic mod maps with very little things but still I have bad fps. By the way when I look back the framrate goes up...