Description: This item takes the +5V and +12V current requirements of the entity and uses the values to obtain a power consumption requirement for the entity. A power supply will specify a negative value indicating a source of power. The value is in Watts. Note that the value returned from this object is the simple arithmetic addition of the all power rail requirements. Note that a power supply may be overloaded even if this value is within the spec of the power supplies. Such a situation can occur if the power supplies can source, say X5 Watts at 5V and X12 Watts at 12V. The total power by this definition is X5 + X12. Now a card could draw Y5 and Y12 from the two supplies. If Y12 is X12+1 and Y5 is X5-2, total supply exceeds total consumption but the 12V rail is overloaded!