The switching power supply life cycle can be effect by the temperature and the fan conditions. Temperature condition is controlled by room temperature and power supply Leaves the gusty area is unobstructed or not. The other condition included the low wattage power supply will cause the temperature enhancement this will shorten the power supply life cycle. As for Fan conditions besides the brand name of the fan effects the power supply life cycle also the dusts in the environment will also reduce the power supply life cycle. Because the electrolysis electric capacitor is the life shortest in all components of a power supply, it is very important to choose electrolysis electric capacitor for non fan power supply.