[MetalMilitia]

Is anything leading you to believe your machine is overheating besides the Speedfan reports?

The best thing to do would be to play a game for a while then reboot your PC and check what your BIOS is reporting for the temperatures. Chances are Speedfan is just talking shit, as it often does.
You have a good HSF and decent case - my guess is your CPU's actual temperature is one of the top two readings and the core sensors are just some other bollocks that you shouldn't worry about.