Graphics fails on Dell XPS 8930 (with nvidia GeForce GTX 1080)

@devisions. Hi and welcome to the Forum. Whilst I have Z15.3 Core, it is on a laptop and I don't have Nvidia graphics to contend with. The subject of Nvidia and Zorin (and therefore Ubuntu) crop up here from time to time, but from searching this Forum and the old Forum have found nothing previous ref your graphics card.

I did find this which may possibly give you a pointer:
https://zoringroup.com/forum/5/14536/

What are the symptoms when you try an install?
What installation method are you using? e.g. "Something else" method.

Also see @swarfendor437 's unofficial manual for Zorin 15 here:

Edit:
Just found this on here: