Hon Hai Precision Industry Co., Ltd.

Sung-Jen Hsiang

Yuh-Ching Chang

Chien-Yi Lo

Puh-Yun Lee

This invention provides a method for testing the power consumption of a CPU. This method involves recording energy output data from a controllable energy input through a CPU emulator. These data is used for assessing the power transferring efficiency. The CPU emulator is then replaced with a CPU, and then a program is run such that the CPU will maximize energy consumption. The energy consumption data is recorded and analyzed with regards to the power transferring efficiency estimating the power consumption of the CPU.

Method for estimating power consumption of a CPU

A method for controlling the rotating speed of a fan is disclosed. The method includes the steps of: reading a standard temperature Tof a central processing unit (CPU); reading a thermal diode's temperature Tand a system ambient temperature T; comparing Twith a minimum temperature T, such that the fan begins processing the heat of the CPU begins; if T&#x3e;T, increasing pulse-width modulation (PWM) duty cycle of the fan to 100%; if T&#x3c;=T, comparing a critical temperature Twith T; if T&#x3e;T, increasing PWM fan duty cycle to 100%; if T&#x3c;=T, setting the fan duty cycle at 40%; sending the PWM fan duty cycle to a fan speed controller.

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Guangdong, China

Sung-Jen Hsiang