Can't get my Geforce GTX 1070 to work on 10.12.4

Hey Guys,

I am installing (have already installed) a Sierra partition on the HDD of my HP Omen (870-251ng).

Mainboard is a Pegatron Model Thimphu with Z170 Chipset, Processor is a i7-7700 (I faked it how it is shown everywhere), GTX 1070 Graphic Card. Sadly I can't find more information about the system as it is a pre build machine.

Now to my problem:

I used unibeast to make a bootable installer, added the HFSPlus.kext, booted to OSX, installed the system. Then I made a bootable EFI partition using Clover (UEFI boot, AptioFix, install all scripts). Installed the webdriver (most up to date) and audio driver. changed the nvidia web variable to true and rebooted. But even though I set the variable to true and removed the flag to disable web drivers, it still uses the pre-installed drivers.

Things I tried:

add the lilu.kext and NvidiaGraphicsFixup.kext Disabling SIP with 0x67

Any Ideas? It is quite annoying with all the flickering graphics. Chrome is even unusable.