An electronic system comprises a system board, one or more cards adapted to couple to the system board, wherein the system board transfers signals to and from the one or more cards, at least one electrically conductive plate, and one or more connectors coupled to the at least one electrically conductive plate to or from the one or more cards. A plurality of power supplies and voltages may be used. A measurement point on the at least one electrically conductive plate may be used to exert additional control over the plurality of power supplies.