Article · Wikipedia archive · Last revised Jul 20, 2026

Thermal Monitor 2

Thermal Monitor 2 (TM2) is a throttling control method used on LGA 775 versions of the Core 2, Pentium Dual-Core, Pentium D, Pentium 4 and Celeron processors and also on the Pentium M series of processors. TM2 reduces processor temperature by lowering the CPU clock multiplier, and thereby the processor core speed.

Last revised
Jul 20, 2026
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Thermal Monitor 2 (TM2) is a throttling control method used on LGA 775 versions of the Core 2, Pentium Dual-Core, Pentium D, Pentium 4 and Celeron processors and also on the Pentium M series of processors.1 TM2 reduces processor temperature by lowering the CPU clock multiplier, and thereby the processor core speed.2

In contrast, Thermal Monitor 1 inserts an idle cycle into the CPU for thermal control without decreasing multipliers.

TM1 and TM2 are associated with DTS/PECI — Digital Temperature Sensor/Platform Environment Control Interface.3

References

References

  1. Performance and Power Consumption Control Features in Intel Pentium 4 and Intel Xeon Processors – Different Names, the Same Principles
  2. Thermal Monitor 2 - Intel E2160 - CPU Pentium Dual-Core 1.80Ghz Fsb800Mhz 1M Lga775 Tray Guide (Page 28)
  3. Berktold, Michael; Tian, Tian (September 2010). "CPU Monitoring With DTS/PECI". Intel. Retrieved 29 April 2017.