Originally filed in September 2008, Intel’s has been granted the patent by the USPTO on March 27, 2012. The patent describes a process to calculate the fan speed that will decrease platform power the most.
More specifically, the patent refers to CPUs that operate in a low temperature state with a fan running at low speed. Intel says that the power saved from the processor can be used to power the fan itself. The process to determine the perfect fan speed would include:
Interestingly, the patent itself doesn’t describe a way to keep the CPU from going over a certain temperature limit, but more of a constantly running fan to reduce the power consumption of the CPU, also referring to the power leakage problem caused by the high CPU temperatures.
Source: Tom’s Hardware UK
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