As this is a dedicated PC Specialist website for their customer/prospective customers we are unable to comment on competitor products/however if you follow this post advice we maybe able to help...
Ok a couple of things I would tryafter checking for windows updates, both standard and optional:
Remove and reseat the GPU, and make sure all its power leads are firmly connected at both ends
Download the latest GPU driver for your GPU from AMD
Download and install DDU from Here...