I put a computer together recently and bought a used Radeon R9 285. It was working fine for the first few days but all of a sudden it stopped working. The PSU is brand new. It works if I uninstall the drivers but as soon as I do install the drivers I get a black screen right after post. Another weird thing that was happening was the CPU is an AMD A10 7800 APU, when I look at the device manager it says it's running off of the APU while to the GPU when it's clearly running off of the video card. Also when running in safe mode I was getting artifacts. Any ideas?