Intel's site gives 68c as the acceptable limit for a 2.0, and 69c for a 2.2 (haven't checked about newer ones). I've hit 70c with my 1.6A and been ok, but I wasn't there for prolonged amounts of time. High voltage kills CPUs quicker, but it has to be some pretty damn high voltage in order to do so.
<font color=blue>Hi mom!</font color=blue>