GTX1060 3G, Sierra 10.12.3 - Can't get GPU to work

Hello!

I have successfully installed macOS Sierra 10.12.3 on my Hackintosh (Core i5-6400 3.2 GHz, GTX 1060 3GB, MSI H110M PRO-VD). But I can't get the GPU to work. The system boots up to the lock screen and I get this weird "blinds" effect. The system is overall super slow, when moving windows, scrolling, etc. The About this Mac page shows Graphics: Display 8 MB. (see screenshot)

I have Nvidia Web Driver installed, and it says that it is using the Nvidia driver rather than the OSX Default (see screenshot)

Any ideas how to fix this? Thanks!