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| Platform Environment Control Interface ： ウィキペディア英語版 |
Platform Environment Control Interface
Platform Environment Control Interface, abbreviated as PECI, is a recent (introduced in 2006) standard used for thermal management in the Intel Core 2 Duo microprocessors.
== Details ==
While previous thermal management technologies have made use of thermal diodes, PECI instead uses on-die digital thermal sensors (DTS). These sensors, after being calibrated at the factory, are able to provide digital data concerning processor temperature information. The PECI bus, allowing access to this data from chipset components, is a proprietary single-wire interface with a variable data transfer speed (from 2 kbit/s to 2 Mbit/s).
From a control standpoint, the main difference between PECI and the previously used thermal monitoring methods is that PECI reports a negative value expressing the difference between the current temperature and the thermal throttle point (at which the CPU reduces speed or shuts down to prevent damage due to overheating) instead of the absolute temperature. For example, for a CPU with maximal temperature of 85 °C and a current temperature reading of 35 °C, the value reported by PECI would be −50 °C.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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