Corsair HX520W Power Supply. Nominal power: 520 W, AC input frequency: 50 - 60 Hz, Efficiency: 80 %. Mean time between failures (MTBF): 100000 h. Certification: UL, CUL, CE, CB, FCC B, TUV, CCC, C-tick This is an auto-generated long summary based on the first three features of the first five feature groups.