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Thermal Management

Common Options : Thermal Monitor 1, Thermal Monitor 2

Quick Review

This BIOS feature determines how the processor should manage its thermal output to avoid damage from excessively high operating temperature. It works in conjunction with the CPU Thermal Monitor or CPU Internal Thermal Control BIOS features.

Current Intel processors have two mechanisms for controller thermal output - Thermal Monitor 1 (TM1) and Thermal Monitor 2 (TM2).

When Thermal Monitor 1 is selected, the processor will perform on-die throttling by inserting null cycles. This forces the processor cores to idle, lowering the thermal output in the process.

When Thermal Monitor 2 is selected, the processor lowers the processor's clock speed by reducing its bus ratio (also known as the multiplier) as well as the bus voltage. This reduces the processor's thermal output. The bus ratio and bus voltage can be adjusted using the TM2 Bus Ratio and TM2 Bus VID BIOS options.

Both mechanisms will reduce the performance of the processor as well as its thermal output. We recommend that you select Thermal Monitor 2 as it is more effective at reducing the processor's thermal output. Even though it has a more significant effect on the processor's performance, this will only occur when the processor's temperature exceeds its thermal limits, e.g. when the CPU fan fails.


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