I saw a post earlier that mentions the main menu having more CPU usage than in-game. So I ran some tests and here are my findings:
90-95% CPU, 80% GPU, 160 FPS
50-70% CPU, 60-70% GPU, 65 FPS
Some people suggested going to the learn screen. So I also recorded the utilization on that window.
70-85% CPU, 70-75% GPU, 230 FPS
So it is true that going to the learn section would decrease the load on your CPU.
Everything is maxed out except shadows which is on high. I ran this test on DX11. I tested this on a low-end PC. My specs are GTX660, i3-3220, 8gb Ram.