be quiet! Dark Power Pro. Nominal power: 1000 W, AC input voltage: 100 - 240 V, AC input frequency: 50 - 60 Hz. Fan diameter: 120 mm, Fan location: top. Motherboard power connector: 20+4 pin ATX. Mean time between failures (MTBF): 100000 h. 80 PLUS certification: 80 PLUS Silver, Safety: Energy Star 5.0, Certification: 2002/95/EG RoHS, WEEE