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Tjmax determination


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Hi Fiery, we're having a discussion in Overclock.net on processor temperature readings. Aida uses Automatic by default, and we were wondering is this a static preset based on the processor or is it a value supplied by the CPU itself on recent processors like my i7 6900K?


Thanks IA for some insight into this!


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On Nehalem and later Intel processors, the TJMax value is SKU specific, and is encoded into a MSR (Model Specific Register). Hence it can be detected, and no need to use static presets or hard-encoded values. However, it also means that the TJMax value may vary between individual parts, so it's not guaranteed that e.g. your i7-6900K would use the same value as your friend's seemingly similar i7-6900K part.



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