Well it is working as you can see the screen
You need to install drivers go to nvidia.com and grab the newest ones this should fix you up. As you can see the gpuz is wrong in every aspect 256 shaders LOL that would be nice you only have 128 for real. DDR4 you have ddr3 and 4 gigs of vram you will have 512 or 1 gig. The clue in is at the bottom it shows standard vga adapter so either you are looking at the onboard (the info would be very wrong for that as well) or no driver is installed to tell gpuz what you have.