Quote Originally Posted by unclewebb View Post
Of course the DTS sensors are very close to each other. The core is about as big as your thumb nail so the large gradients that used to exist in the Pentium 4 era have been reduced to next to nothing. If one core at full bore brings the other core up to within 1C of it then at idle the difference between an IR gun IHS reading and the "real" core temperature can't be greater than that.

You don't have to go all the way up to TjMax when testing. At an IR reading of 60C, the DTS shows 35 on my E8400. at 70C is was showing 25 and at 80C it was showing 15. I plan to do some more high temperature testing when I get a chance to make sure the PROCHOT# feature is working properly.
OK, but these 45nm chips are made w/ some exotic materials that may transfer heat better. Plus, the cores are physically one very small compact item, and the heat may transfer well between them (or at least the sensors), but that doesn't mean the heat will transfer just as well through the TIM and IHS (which has a much larger surface area, and a much better ability to cool more quickly).

Using your above data, and assuming a 10*C gradient, then the 60*C reading would correspond to a 70*C die temp, and w/ a 35 DTS reading that gives you 105*C Tjmax. It works the same at the higher readings.

Now the lower readings have to be adjusted as you say, but these upper readings don't prove to me that Tjmax is 95*C...quite the opposite.