Thanks for reply! Well I haven't tried changing the API yet. Need to test. As far as i know my gpu utilization can be 100% if i disable v-sync.
btw in a tutorial i can play with max settings, even with ssgi and get 60 fps and good gpu util. Even so i can play with similar settings in main game BUT without lights on a base, or somewhere in the forest, and thats is frustrating me :(