I'd try Anort3's suggestion, or something like this. If it doesn't work using the DDU and a clean installation of the latest drivers, then try running the DDU again and do a clean install of the last driver version you know worked well.
http://www.tomshardware.com/faq/id-2767677/clean-graphics-driver-install-windows.html
Also, there is clearly something wrong with your system, as in, the CPU is staying locked at a lower clock speed, because there is no possible way that under a gaming or other high load your CPU temps should peak at 32°C. The lower temp readings can be ignored since AMD thermal sensors don't work worth beans at the low end of the spectrum, but if you're only seeing 32 degrees when the system should be under load, and you're having performance issues, it's likely that the CPU is not adjusting the clock speed and voltage to match the load. I'd start by resetting the bios to default settings and changing your control panel power profile to performance.