be quiet! Straight Power E8 CM. Nominal power: 580 W, Peak power: 650 W, AC input voltage: 100 - 240 V. Fan diameter: 120 mm, Fan location: side, Fan speed: 1357 RPM. Motherboard power connector: 20+4 pin ATX, Connector(s): IEC C14. Noise level: 21.2 dB. Weight: 1.96 kg