The IR measured difference between my E6400 - B2 and my E8400 - C0 is 10C. According to Intel's new document, the difference is actually 30C.
Edit: Intel calls these values Target TJ which don't seem to have too much to do with actual TjMax.
After the August announcement I thought that for a lot of users, using the Intel Target TJ as TjMax might not necessarily result in more accurate core temperatures. After this announcement, I can state as a fact that using the Intel specified "Target TJ" as TjMax for your E6x00 B2 processor will result in reported temperatures that aren't even close to accurate. These new facts go against any real world testing that's been done by rge or myself and makes both of us wonder how accurate the August news release really was.
Maybe this means I need to run out now and buy a Core i7. Naah, they can keep them.
Edit: I re-read the document and they seem to be calling this number Target TJ. My opinion is that if users use Target TJ as TjMax then they will end up with some very unbelievable core temperatures. My E6400 is a good example:
In my 11C basement, it would be reported as running at minus 6C. Not that bad for an air cooled processor! I definitely recommend not using Target TJ as your TjMax value. Using Target TJ as TjMax for the 45nm processors might be questionable as well. Some 45nm processors will likely be reported a couple of degrees on the high side but if you do a RealTemp calibration then even if TjMax is off by a couple of degrees, your reported temperatures from 25C to 65C will still be reasonably accurate. This new info isn't going to help us out any.
Page 13 of the new Intel IDF bible says:
"The values listed for TJ Target are not specifications."
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