The ATX motherboard is designed to operate with at least a 145 Watt power supply for typical system configurations. A higher-wattage supply may be required for heavily-loaded configurations. The power supply must provide +5VSB (voltage stand by) with 720mA of current (see the ATX2.01 or later specification). If the power supply does not supply sufficient current, some system configurations with the motherboard may not power up. Additionally, if the power supply can not supply sufficient current, and does not have overload protection, the power supply may be damaged. That is why we pay close attention to the manufacture process of the power supply in our case so that it would not be a problem of the end users.