Hello I just notice that on my I7 4790k the cpu usage in rfactor2 is different on each core. First not sure if that is normal but on 4 cores is 0% then on another two cores is very low 10-15% and then third one has something 50-60% and one core is running high usage 80-90% Is that normal or there is some trick to do for rfactor2 like it was for rfactor?
By default, the multithreaded physics are turned off. Set the Player.json file variable “Sim Processor Thresh” to 3 to turn on and see if that changes anything for you.