I had this problem, and it was really confusing because when I first booted all was fine and at some point when I was checking gpu's temperature was around 54 and usage at 95, in msi afterburner. I closed all 3 processes, a movie and 2 torrents and nothing changed. As soon as I closed java update scheduler, which was also eating some 20% of the cpu, gpu usage went down at 0% and temp at 38, cooling after a few minutes at 32.
So just disable java's checking for updates and this won't happen. Something else might also cause it, but this solved it for me.