Patent ID: 7398402
Filing Date: 2008-07-08
Classification: G06F,Y02D

Abstract:
1. A computer system, comprising: a central processing unit (CPU); a cooling fan; an operating system (OS); a temperature sensor sensing a temperature within the CPU; a mode selector for selecting one of a fan off mode, turning off the cooling fan, and a fan on mode, turning on the cooling fan; a microcomputer controlling the cooling fan based on the selected mode and outputting a selection signal corresponding to the selected mode; and a BIOS controlling a clock frequency of the CPU based on a sensing result of the temperature sensor if the BIOS receives the selection signal as corresponding to the fan on mode from the microcomputer, and allowing the OS to selectively control the clock frequency of the CPU if the BIOS receives the selection signal as corresponding to the fan off mode, wherein if, under the fan off mode, a predetermined driving condition, previously requiring a particular control of the clock frequency of the CPU, is detected, the OS selectively controls the clock frequency of the CPU based on the sensing result of the temperature sensor without regard to the predetermined driving condition.