To display your Ark Survival Evolved PC fps on your monitor. You can view the video below, or follow the instructions.
1) bring up the command line by hitting TAB. (the command line is a thin black line on the bottom of the screen)
2) type stat fps and hit enter
There should be a display of your fps towards the upper right-hand corner of your screen. To turn the fps display off simply do steps 1 and 2 again.