Unfortunately, this list is not accurate, especially for the 65nm processors. Intel has already started making corrections to this list but sadly, even their corrections don't agree with what an IR thermometer says. A good example is my original B2 stepping E6400. The chart at Tom's says a B2 is TJMax=70C. When DTS=0 for that processor the IHS is at 85C. That implies that the actual core temperature is approximately 90C. It's definitely not 70C and it's not Intel's corrected version of 80C either. At the moment these numbers are meaningless. I'm obviously a little biased here but until Intel publishes some test data, which they don't plan to do, I'll be sticking with values that actually make sense.