Thermal Monitor 2 Explained

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]

Notes and References

1. http://ixbtlabs.com/articles2/intel-thermal-features/index.html Performance and Power Consumption Control Features in Intel Pentium 4 and Intel Xeon Processors – Different Names, the Same Principles
2. http://www.manualslib.com/manual/384172/Intel-E2160-Cpu-Pentium-Dual-Core-1-80ghz-Fsb800mhz-1m-Lga775-Tray.html?page=28 Thermal Monitor 2 - Intel E2160 - CPU Pentium Dual-Core 1.80Ghz Fsb800Mhz 1M Lga775 Tray Guide (Page 28)
3. Web site: Berktold . Michael . Tian . Tian . September 2010 . CPU Monitoring With DTS/PECI . Intel . 29 April 2017 .