Ah, but it isn't used, even if installed -- in safe mode, the windows drivers are used.  This is even more conclusive evidence of a dying GPU.  If the system works acceptably for you using only the Intel GPU, you're set.  If not, and you need the nVidia  GPU, you need to replace the system board.  
Hello, i have Dell XPS 9570 and i have problem with GPU driver (Nvidia) every time i download Nvidia driver the operating system (windows 10) crashes with blue screen: Stop Code : PAGE_FAULT_IN_NONPAGED_AREA What failed: nvIddmkm.sys i reinstalled windows 10 many times but i got the same issue when installing GPU driver also i tried Linux but still it crashes. (That happens only after installing Nvidia GPU) Please help. it's really frustrating  
dell xps 9570 OS crashes when installing nvidia driver