Product Detail Sold Individually Industrial-grade protection circuitry prevents damage resulting from short circuits, power overloads, over voltage and under voltage PCI-E connector - one for 380W and 430W, two for 500W Input frequency Range - 47Hz - 63Hz PF value up to 99% . The "Antec 380 Watts Earth Power Supplies EA380" is best product for you. We recommended Antec 380 Watts Earth Power Supplies EA380