be quiet! Dark Power 13 850W PSU Review – Impressive Efficiency, Dead Silent & Decent Performance

Average Noise

avg_noise_115V

avg_noise_230V

The average noise is dead low at both voltage inputs.

Fan Noise & Speed Maps @ 28-32 °C

CL_Fan_Noise

CL_Fan_Speed

There is no semi-passive mode, but still, the fan spins at such low speeds that noise output is below our chamber’s threshold (noise floor). With up to 720W, the PSU’s noise doesn’t exceed 20 dBA and remains below 25 dBA at higher loads.