Be-Quiet Straight Power E8 CM. Nominal power: 480 W, Peak power: 550 W, AC input voltage: 100 - 240 V. Form factor: ATX, Purpose: PC, ATX version: 2.3. Fan diameter: 120 mm, Fan location: side, Fan speed: 1251 RPM. Motherboard power connector: 20+4 pin ATX, Connector(s): IEC C14. Noise level: 18.9 dB