![]() Nonetheless, this is the temperature shown in BIOS, and on some motherboards is shown on the two digit "debug" display. Present Method: Core i Sockets 115x, 1200, 1700 and Extreme / X-Series Socket 20xx processors do not have an Analog Thermal Diode, but instead " substitute" the "hottest Core" for "CPU" temperature, which is a contradiction in terms that's confusing. ”CPU” temperature is typically inaccurate and can vary greatly with BIOS updates. ![]() The monitoring utility provided by the motherboard manufacturer on your Driver CD displays “CPU” temperature in Windows. The Analog value is converted to Digital (A to D) by the motherboard's Super I/O (Input / Output) chip, then is calibrated to look-up tables coded into BIOS. Previous Method: Core 2 Socket 775 and Core i 1st Generation Socket 1366 processors have a single Analog Thermal Diode below the Cores to " substitute" for a thermocouple sensor. CPU temperature is also frequently confused with "Package" temperature, which is the '"hottest Core". Both have inconsistencies with the Datasheets which use proper terminology. There are numerous instances where Intel contradicts their own terms, such as Intel Extreme Tuning Utility software (XTU) and the Product Specifications website. Note 1 : The term “CPU” temperature is commonly misused as a general term for any processor temperatures, which blurs the distinctions between CPU temperature and Core temperature. Unfortunately, Intel has no documentation that describes the relationships between specifications and temperatures in a practical sense, so further explanations are given throughout the Guide. Accordingly, the limiting Thermal Specification is Tjunction not Tcase. Since users can monitor Core temperatures but not IHS temperature, Core temperature is the standard for thermal measurement. It's measured at the heat sources where temperatures are highest. It's a factory only surface measurement that users can't monitor. ![]() CPU temperature is instead a single measurement centered on the external surface of the CPUs "Case" or "IHS" ( Integrated Heat Spreader) where the cooler is seated. Core temperatures are measured at the heat sources near the transistor "Junctions" deep inside each Core where temperatures are highest. Intel Desktop processors have temperatures for each "Core" and a temperature for the entire "CPU".
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