Issues blackscreen/can’t change the resolution of my working screen

Hi all,

I finally got my hackintosh working “correctly”. I have 2 issues left.

I cant get my second screen to work stays black. And i cant adjust the resolution on the screen that is working atm. Any thoughts how i can solve these issues? Thanks for helping out :)

At system information it says graphic card vendor nividia so i quess that the mac sees my graphic card

Spec: i7-6700k 4,01ghz 16gb ram nividia gtx 790