Patent ID: 7549075

Claim:
A system for adjusting execution frequency of a central processing unit (CPU) in an electronic apparatus, the system comprising: an operating system (OS) at least comprising an OS-directed configuration and power management (OSPM) module; a basic input output system (BIOS) at least comprising an advanced configuration and power interface (ACPI), and a frequency processing module; wherein: the OSPM module is used for obtaining a state of a CPU workload by detecting the usage ratio of the CPU in real time, and transmitting the state of the CPU workload to the BIOS via the ACPI; and the frequency processing module is used for determining whether an execution frequency of the CPU needs to be changed according to the state of the CPU workload, determining whether the execution frequency is higher than a property frequency of the CPU if the CPU workload is in a normal state, decreasing the execution frequency as a suitable frequency if the execution frequency is higher than the property frequency, and adjusting the execution frequency of the CPU according to the suitable frequency.