A power control method for an information processing apparatus having a processor and a PCIe (Peripheral Component Interconnect Express) device configured to communicate with the processor via a PCIe bus, the power control method comprising
- notifying, via the processor, the PCIe device of power mode information indicating a power mode of the information processing apparatus;
- notifying, via the PCIe device, the processor of time information corresponding to the power mode information;
- and
- determining, via the processor and based on at least the time information, a power state to which the processor is to shift.