Corsair RM550x. Nominal power: 550 W, AC input voltage: 100 - 240 V, AC input frequency: 47 - 63 Hz. Fan diameter: 13.5 cm. Motherboard power connector: 24-pin ATX, Cabling type: Modular. Form factor: ATX, Purpose: PC, ATX version: 2.4. Colour of product: Black