I'm assuming those are idle temps? How are your load temps looking?
If nothing else has changed and temps look good at load, then there;s potentially a couple of points to address:
1. A good chance you just have a driver conflict. Uninstall your GPU driver(s), however many may be installed, then head to nVidia's site and download the latest (non-BETA) manually. That's likely all there is to it.
2. Another option is your HDD may be failing - a good idea to run health checks on your drives just to rule them out.
3. When did you install your OS/Format your drive? If you've been running this setup since the CPU or GPU were released (late 2012/early 2013), you've got 3+ years of buildup there, a clean install might be a good idea.