LatinoCreamKing :
My main specs go as follows : Amd R9 280x, Amd FX 8350, 8gigs of rams, and a Rosewell 750w psu. As far as I know this a relatively recent issue. I checked for viruses, re-installed drivers, all of that good stuff. I don't know what to do haha. This pc isn't even a year old yet. The activity is above 90%, and the temps are a little above 80.
I had a similar issue once, and I discovered that it was caused by a virus, which was stealthily using my GPU to Cryptomine, probably sending the info back to a botnet host in Russia or China. It didn't take long for me to weed it out, and the horse it rode in on. When you say you checked for viruses...what all did you use? because it still might be lurking if it is a trojan.
I guess a quick way to check if it is not this is to boot up in safe mode, so that most of your third party programs will not be running, it could be that some application you have installed is utilising your GPU without you realising. Look within your processes under tasks manager and check under the "descriptions" tab and see if there are any vendors that you don't recognise aside from programs and Windows services that you do. See if there are any that are using a disproportionate amount of RAM or CPU....that may point out the culprit/infection.
Usually when I get an issue like this, I just reformat the OS drive and reinstall and "nuke the site from orbit.... It's the only way to be sure."
😉