be quiet! Pure Power 13 M 550W ATX v3.1 PSU Review

Average Noise

The PSU’s average noise output is exceptionally low, resembling that of a passively cooled unit. Its average noise falls below the background noise threshold of our hemi-anechoic chamber, which is around 6 dBA.

Fan Noise & Speed Maps @ 28-32 °C – 115V

The PSU’s fan noise is below 6 dBA during its entire operation under normal temperatures. In the fan speed graph, you will see that the fan’s passive operation lasts long enough, and even when the fan starts to spin, it does so at low speeds; hence, the noise output is very low.

Fan Noise & Speed Maps @ 28-32 °C – 230V

The fan speed profile at 230V is identical to that of the 115V input. It doesn’t get any quieter, after all.

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5 thoughts on “be quiet! Pure Power 13 M 550W ATX v3.1 PSU Review

  1. Are you willing to evaluate the lowest category Be Quiet series as well? Most notably the brand new System Power 11 series? It has 450W and 550W members, and it is the cheapest Be Quiet PSU on the market. A lot of people are buying them, without knowing how dangerous (or safe?) they are, after the System Power 10 test turned out that they are not that terrible, contrary to the tribal knowledge (System Power 10 Bronze series has been downgraded to Tier E on the SPL PSU Tier list).

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