CPU usage at 100% with everything on minimum

Is this right? I have a dedicated graphics card, a 1050ti. I know it’s old. But it should be in use as well, shouldn’t it? The drivers are up to date and everything. I’ve noticed that in some games the usage percentage is higher if I change the graphics settings and put everything on minimum, disable effects, etc. But sometimes it doesn’t change at all. What else do I have to do to fix this?