Platform Environmental Control Interface (PECI)

PECI is an Intel proprietary interface that provides a communication channel between Intel® processors and chipset components to external system management logic and thermal monitoring devices. The processor contains a Digital Thermal Sensor (DTS) that reports a relative die temperature as an offset from Thermal Control Circuit (TCC) activation temperature. Temperature sensors located throughout the die are implemented as analog-to-digital converters calibrated at the factory. PECI provides an interface for external devices to read processor temperature, perform processor manageability functions, and manage processor interface tuning and diagnostics.

The PECI interface operates at a nominal voltage. The set of DC electrical specifications shown in PECI DC Specifications is used with devices normally operating from a PECI interface supply.