So today I set both fallout 4 and witcher 3 at the same settings ( High preset ) on my rig.
Both games run at the same framerate . 60 FPS on less populated areas and 40-60 FPS in towns and other more populated areas.
Thing is witcher 3 looks magnitudes better and it still runs at the same framerate as fallout 4. One game is demanding because it looks good while the other game is demanding because of poor optimization . When witcher 3 has frame drops I care less because I am happy for what is being presented on the screen.
When fallout 4 drops frames it is far more annoying.
Fallout 4 is probably the most poorly optimized open world game this year . MGS V , GTA V , Witcher 3 , Mad Max have done open worlds on the pc with superb optimization , looking and running perfectly .
Bethesda really needs a new engine.