Today I installed a new ryzen 5 3600 cpu, and changed the ram to 3200mhz 16gb, as previously the cpu and ddr4 were quite old, and salvaged out of my old pc.
I booted up fs20, and put myself straight in ce tral london, and low to the building on medium i was getting around 40fps, and higher about 55fps.
The was still a slight bit of lag, but i feel that may just be the game it self.
Its running on a samsung evo ssd, which is new.
So this evening, ive formatted the computer again, and ill update tomorrow when the giant update has installed and see how thinga are