rtd cpuModule CMX47786HX, User Manual

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CMX47786HX RTD Embedded Technologies, Inc.
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Thermal Throttling
The CMX47786HX cpuModule supports thermal throttling. Thermal throttling allows the CPU to
continue operating at a lower clock rate when the CPU core exceeds a temperature limit. The power
consumption and heat dissipation are therefore lowered, reducing the thermal stress on the CPU.
The CPU will return to its normal speed when the temperature returns to 10C below the throttling
threshold.
Thermal throttling is enabled in the BIOS Setup utility. There are three levels; 25%, 50%, and 75%,
which are the percent of full speed that the CPU will operate at when throttled. For example, with
throttling set to 75%, a 400 MHz CPU will operate at 300 MHz during excessive temperatures.
When enabled, thermal throttling is started and stopped without any intervention from the operating
system or application software.
Because thermal throttling starts before the internal temperature limit of the CPU is reached, throt-
tling may occur within the operating temperature range of the cpuModule.
When thermal throttling is disabled, the CPU will operate at its maximum speed regardless of tem-
perature.