I never use prime 95 for testing; use your own video cards and games for testing purposes. My own 760 i5 got up to 90c briefly while testing (without any thermal grease) and continued to run windows. The only reason for messing with it is if you want to install an aftermarket cooler. If you don't want to remove your board, measure the space around to make sure the cooler will fit, etc. then I would leave it alone.