<p>A power unit comprises a power plane which is electrically connected with a processing circuit and thereby supplies power to the processing circuit (221) and to each supply portion of which the plurality of processing devices (221) are connected, a plurality of OBPs (223) which supply power to the processing circuit (221) via the power plane by applying voltage to the power plane, and a power control unit (224) for uniforming different voltages in the supply portions by controlling an application voltage in each of the plurality of OBPs (223) in such a manner that the status of the supply of power in other OBP (223) out of the plurality of OBPs (223) is reflected are provided.</p>
