be quiet! Pure Power 11 FM 650 W Review - Kill the Noise

Name: be quiet! Pure Power 11 FM 650 W
Brand: be quiet!
Price: 125 USD

crmaris

on May 11th, 2021,

in Power Supplies.

Manufacturer: be quiet!

Efficiency »

Test Setup

Primary Rails Load Regulation

The following charts show the voltage values of the main rails, recorded over a range from 60 W to the maximum specified load, and the deviation (in percent) for the same load range. Tight load regulation is an essential characteristic for every power supply because it allows for constant voltage levels despite changes in load.

5VSB Regulation

Load regulation is tight on all rails. It would be even tighter at +12 V without the sudden increase in this rail's voltage at light loads.

Ripple Measurements

Ripple represents the AC fluctuations (periodic) and noise (random) found in the DC rails of PSUs. Ripple significantly decreases the life span of capacitors because it increases their temperature; a 10 °C increase can cut into a capacitor's life span by up to 50 percent. Ripple also plays an important role in overall system stability, especially when it is overclocked. The ripple limits according to the ATX specification are 120 mV (+12V) and 50 mV (+5V, +3.3V, and 5VSB).

Ripple Measurements - be quiet! Pure Power 11 FM 650W
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	8.4 mV	4.1 mV	4.7 mV	5.9 mV	Pass
20% Load	6.3 mV	4.4 mV	5.1 mV	6.1 mV	Pass
30% Load	8.8 mV	4.1 mV	5.6 mV	6.0 mV	Pass
40% Load	8.7 mV	4.5 mV	5.4 mV	7.3 mV	Pass
50% Load	7.7 mV	4.5 mV	5.4 mV	6.9 mV	Pass
60% Load	9.0 mV	5.7 mV	6.4 mV	8.2 mV	Pass
70% Load	9.6 mV	8.1 mV	13.7 mV	10.6 mV	Pass
80% Load	9.7 mV	8.3 mV	17.9 mV	10.5 mV	Pass
90% Load	10.7 mV	7.1 mV	12.1 mV	9.3 mV	Pass
100% Load	18.2 mV	7.3 mV	13.4 mV	10.5 mV	Pass
110% Load	19.8 mV	7.7 mV	13.9 mV	11.2 mV	Pass
Crossload 1	7.9 mV	5.2 mV	12.6 mV	7.4 mV	Pass
Crossload 2	17.5 mV	6.5 mV	8.1 mV	9.9 mV	Pass