The 80 PLUS 230V Bronze certification indicates that a high percentage of the electricity is converted into useful power, therefore there is less heat lost and more money saved on the electricity bill. The bulk capacitor inside serves to support working under an extremely harsh environment, such as with high temperatures, peak voltage fluctuations. It stabilizes the performance for high reliability that your system can count on. A 120mm Sleeve Fan, an advanced thermal control fan makes optimal cooling and reduces noise. And longer lifespan than a standard fan. We know what builders need. The all black cables give your system a superior look.