An information processing apparatus (MFP) according to an aspect of this invention selects, from among memory channel groups composed of possible combinations of available memory channels in a wide IO memory device, a memory channel group with a number of memory channels that can maintain a necessary data transfer rate even if the operation frequency is reduced. At that time, the MFP evaluates the power consumption of the wide IO memory device in the case of using each memory channel group at the operation frequency and operation voltage corresponding to the number of memory channels in the memory channel group and to the transfer rate needed for job execution. As a result of evaluating power consumption, the MFP selects the memory channel group with the lowest power consumption and uses it for job execution.