switched from a GTX 1050 to a R9 390 because it was cheap and it had a lot of vram. So I uninstalled the Nvidia drivers and installed the amd ones but it would boot then say AMD drivers not installed or in certain games it would crash or say incorrect drivers. I tried DDU and it didn't work so instead I deleted a program called AMD software. When I did that at the time it seemed fine it was only after I restart that it started not posting. My CPU is a Ryzen 1400 so maybe I uninstalled the wrong thing?