After using 17.10.2 Wattman has shown usage constant 0-100% activity during games. There was some frame drop as well. Uninstalled with ddu in safe mode each time, I tried 17.10.1 and earlier drivers, now 17.10.3, still the same. Gameplay now is constant fps, no stuttering from before. Maybe the latest Windows update?
The solid activity is when I left the game.