Patent ID: 7469351

Claim:
Multiple computer equipment comprising: at least one CPU module comprising a processor, and a DC-DC power supply for supplying power to the processor; AC-DC power supply modules each being connected to a corresponding one of the CPU modules, each of said AC-DC power supply modules comprising an AC-DC power supply unit for supplying a required amount of power to the DC-DC power supply in response to an operation state of the processor; a CPU module controller included in the CPU module, said CPU module controller controlling power supply even when the processor is not operating, said CPU module controller being connected to the AC-DC power supply modules through a power supply control interface so as to control the output of the AC-DC power supply modules; and a management module which is connected to the CPU module controller through a management interface so as to control the power supply of the CPU module; wherein said management module: holds system information including status information of the processor, operation information of the CPU module, and power consumption information provided on a processor kind basis; on the basis of the system information, calculates power consumption required for each of the CPU modules; calculates the number of operating AC-DC power supply modules required to ensure the calculated power consumption; and on the basis of the result of the calculation, determines the number of AC-DC power supply modules to be operated.