90-100C prime? wow that is hot.. You can generally substract 10C from Everest's core readings as it uses the wrong Tjunction for the 45nm CPUs, just like coretemp.
So if it shows 100C you are at around 90 which is already dangerously close to the junction (95C).
I get a max of 78C Everest reading, but only after weeks of continuous crunching and 30C ambient. I wouldn't like it if it went over 70C real...