Set NVIDIA GPU as the default VGA controller Ubuntu Dell 7559

Hello, I bought a dell 7559. I want to use cuda toolkit and some deep learning frameworks. So , i installed ubuntu 16.04 but after installing nvidia drivers I am not able to set my GPU as the default vga controller. In nvidia settings I dont see nvidia prime profiles. I have nvidia 361.45 driver. I tried installing aa few other versions of the driver but I still dont get the prime profiles in nvidia settings. I checked the bios to see if I could set it to use only gpu for display but there is no option for that. Is there any  way I can disable nvidia optimus technology? If not is there a was to make it  use only my gpu for display.