I have seen many thread’s about people lagging, so I’d like to share how I fixed my FPS.
Right click rust in steam, go to properties -> set launch option and type this:
Now join your favorite server and press F1 (Console). Find your server’s IP and copy it. Close Rust and start it again, now open Console and type “net.connect 4126.96.36.199:19902” - This is just a example! But this should increase your FPS as well. I now have steady 60 fps after I’ve done this.