Ever since I got my laptop, I always wondered why the GPU usage or the CPU usage for any core at all isn't maxed out when I play a couple of games. One of those games being The Elder Scrolls Online maxed. (40 frames in some heavy towns). From what I see so far, the GPU usage seems to reflect on the frames. If that's the case, is there a way to force 99% GPU usage? I'm sure on one of my older desktops I've witness 99% GPU usage.
In Windows 10 click Start Button and type "Power Options". Open it and you will see "Preferred Plans". Below that there will be an option "Show Additional Plans". Click it and select High Performance option.
I hope this helps. You can use MSI Afterburner or Windows Task Manager to view CPU and GPU status. Just press ALT+TAB while playing game to see usage.