Cannot make my pc render game on GF card.

Long story short, have a laptop. GT650m and HD4000 (integrated). When playing rust, it uses only hd4000. All my attempts to make it use GT were futile. Even downloaded chrome, enabled gpu acceleration to no avail. I bet there are lots of peeps here knowing more stuff about computers than i do, so the question is: how can i make the game/unity player use my GT650 not integrated card, if its possible?

Thank you.

use opera browser

Thanks. I will try as I return home, and update on my trials, because I bet im not the only one with this problem.

Edit: Yep, did what you guys said. Atlast can play this with mroe than 20 fps