be quiet! Pure Power 13 M 850W: ATX 3.1 and quiet operation win reviewers

Reviewers praised ATX 3.1 compliance and quiet operation, but noted audible fan noise under full load.

1 min read

The product is a black power supply unit photographed from a three-quarter angle, showcasing its rear panel with multiple connectors and a fan.
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Specifications

Model
PURE POWER 13 M 850W
Continuous Power
850 W
Peak Power
900 W
Form Factor
ATX 3.1
EPS 12V Form Factor
Version 2.92
Topology
LLC + SR + DC/DC
Input Voltage
100‑240 Vac
Input Frequency
50‑60 Hz
Input Current
12 / 6 A
Power Factor @ 100% Load
>0.98
Modern Standby
Yes
Standby Power Consumption
<0.1 W
Average Lifetime
>100,000 h @25°C
Efficiency Certification
80 PLUS Gold
Efficiency @ 10% Load
90.0%
Efficiency @ 20% Load
93.2%
Efficiency @ 50% Load
94.4%
Fan Size
120 mm
Bearing Technology
Rifle
Motor Technology
4‑pole fan motor
Max Fan Speed
2000 rpm
Noise @ 10% Load (dB(A))
7.5
Noise @ 20% Load (dB(A))
7.6
Noise @ 50% Load (dB(A))
8.3
Noise @ 100% Load (dB(A))
17.6
12V Single Rail Operation
Yes
+3.3 V Current
22 A
+5 V Current
22 A
+12 V1 Current
70.9 A
-12 V Current
0.3 A
+5 Vsb Current
3 A
Max 12V Power
850 W
Max 12V‑2x6 Power
600 W
Max 3.3 V+5 V Power
120 W
Hold‑up Time @ 100% Load
25.09 ms
Hold‑up Time @ 80% Load
33.38 ms
Power Good Signal
100‑150 ms
Modular Cables
Yes
Dimensions (L×W×H)
160 × 150 × 86 mm
Weight
2.62 kg

Photos

The product is a black power supply unit with a prominent fan on the front and various ports labeled on its side.
The product is a black power supply with a circular fan in the center, viewed from a three-quarter angle.
A black power supply unit photographed from behind, showing various ports and connectors.
The product is a dark gray, rectangular power supply unit photographed from behind.

What reviewers say

  • The Hardware Busters review notes that the be quiet! Pure Power 13 M 850W is a fully modular, ATX v3.1 compliant PSU that delivers Platinum‑grade efficiency and very low noise (A++). The article highlights its silent operation, support for modern standards such as PCIe 5.1, and solid build quality from FSP.

    hwbusters.com ↗
  • The Honest Verdict gives the Be Quiet! Pure Power 13M 850W a solid editorial score of 8/10, praising its 80 Plus Gold efficiency, ATX 3.1 compliance, Japanese capacitors for longevity, and genuinely quiet operation backed by owner feedback. It notes that the unit is well‑built and reliable for most mid‑to‑high‑end gaming builds, but points out a few drawbacks: it lacks zero‑RPM mode (so it won’t stay completely silent), its semi‑modular cabling can be less convenient in tight cases, and its 5‑year warranty is shorter than some competitors’ longer warranties.

    www.vividrepairs.co.uk ↗
  • The review praises the Pure Power 13M 850W as a solid mid‑to‑upper tier PSU that balances quiet operation, future‑proof PCIe 5.1 support, full modular cabling and strong voltage regulation while noting minor drawbacks such as limited replacement cable availability and audible fan noise under sustained full load.

    www.review-rating.com ↗
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