Efficiency Improvement of Computer Power Supply using Power Consumption Estimation from CPU Performance Monitors

The power supply for a processor must remain highly efficient over a wide range of conditions, including light loads. To date, to improve the efficiency of CPU power supplies, the adaptive power efficiency control method, which involves adaptively interlocking power control with processor logical data processing workloads, was proposed. It was shown that improved power efficiency of the CPU power supply was possible using this method. However, the efficiency improvement of the method has not yet been verified through experiments. In this study, the method was applied in a hardware experiment to verify the efficiency improvement of the processor power supply. The results showed that the method could improve power efficiency and reduce power loss.