So, the title of thread pretty much explains what is the problem. The GPU is using newest update (16.8.2), it`s not overclocked, no viruses or malware (checked with malwarebytes and windows defender), newest BIOS on motherboard (MSi Z170A G-43 Plus), CPU is i5 6600K and PSU is Seasonic M12IIEVO 620W. The only way to stop this usage is to restart my PC, because there are no malware or viruses that work in the background. Checked numerous time TaskManager and even tried to stop some processes and services, nothing helped. This was happening with old drivers also. What can be the problem, is the card maybe defected?
You're not alone as I am experiencing this as well. For example, when I run Unigine Heaven benchmark for a while and then close it, my GPU usage will stay at 100%.
I have the XFX RX 480 GTR Black Edition. I also experienced the same issue with my Sapphire RX 480 8GB Reference card. I am assuming it is driver related. Something that has gone by driver updates unfixed.