cpu core voltage issue

ahms

Honorable
Sep 28, 2013
58
0
10,640
i have an i5 4670(not unlocked cpu) i have an overheating problem temp:70-84 at max load
i was told by a member here on forums to reapply thermal paste and i'm getting the hyper evo 212
but iam noticing that my cpu core voltage changes from .680 to 1.770 and the temperature rises with it so does the core voltage have anything to do with the overheating or is it normal and how will using the cpu with the 70-84 c for a week affect my cpu longevity