be quiet! Power Zone 2 850W ATX v3.1 PSU Review

Average Noise

The average noise output is low.

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

At up to 430W, the PSU’s fan doesn’t spin; it starts spinning at higher loads for a short period only to stop again (for short periods). Generally, the PSU’s noise remains below 25 dBA at up to 605W ,and the 30 dBA mark is passed at 700W.

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

The 230V input fan speed profile is identical to the 115V one. The above 30 dBA operation has moved a little forward, at 710W.

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3 thoughts on “be quiet! Power Zone 2 850W ATX v3.1 PSU Review

  1. Hello Aris!
    Trying to decide between this PSU and the Corsair Rm850x ATX 3.1 version – the Corsair allows manual fan rpm control, and my Lancool 207 case allows only downward fan orientation, would this be an issue for Power Zone 2 and make the fan start/stop intermittently since it has no manual control? Would you say the be quiet is the better pick overall since it has better Cybenetics ratings? Thanks for your reviews and hard work!

    1. PowerZone 2 has better noise rating, I have this PSU I never hear it. The problem is I measured mine and it exceeds 160mm which is the size limit for the Lancool 207 that I want to get. Were you able to fit the PSU and route the cables through, do you use the 12v power connector that’s sensitive to bending? This is what I’m worried about.

      I found some other comment about this PSU and Case combo but no mention about that nvidia problem cable.

      1. I got the MSI MPG A850G instead because of better availability/price in my area. It is also 150x150mm, so more cable space than the others would have, but I think 160mm would still be manageable. I haven’t tried the 12v, but it could be concerning. The one included with the MSI is pretty stiff, and would probably have to bend even with the extra clearance. Maybe a more loose/flat cable would work better in this case.

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