be quiet! System Power S6 450W. Nominal power: 450 W, AC input voltage: 100 - 240 V, AC input frequency: 50 - 60 Hz. Fan diameter: 120 mm, Cooling type: active. Motherboard power connector: 20+4 pin ATX. Width: 150 mm, Depth: 140 mm, Height: 86 mm. 80 PLUS certification: 80 PLUS, Certification: CE, CB, TÜV, Nemko (N), Semko (S), Fimko (FI), Demko (D)