Nope i can't see that you really have any problem at all.
The temps are fine specially as they are core temps and not the overall temp(out of interest how long were yyou stressing the CPU with prime for?). but out of interest what is th temp of the CPU in BIOS?(i know this temp isn't when the CPU is stressed) but it is a very good marker for your CPU.
Regarding OCCT, i really would not worry much, as long as you dont get any errors, freezes crashes etc in the day to day use you have nothing to worry about, i say this because intel won't replace your cpu based on that occt, or any other such program brings up an error. So accordign to them tis all good.