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.
Good news. That program is displaying the actual DTS reading and is accurate.
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