be quiet! Power Zone 1000 W Review

Name: be quiet! Power Zone 1000 W
Brand: be quiet!

crmaris

on Jan 2nd, 2014,

in Power Supplies.

Manufacturer: be quiet!

Performance Rating, Performance per Dollar & Noise Rating »

Ripple Measurements

You will see the ripple levels we measured on the main rails of the Power Zone 1000 W in the following table. The limits are, according to the ATX specification, 120 mV (+12V) and 50 mV (5V, 3.3V, and 5VSB).

Ripple Measurements - Be Quiet! Power Zone 1000
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	23.4 mV	16.1 mV	14.0 mV	7.7 mV	Pass
40% Load	19.5 mV	17.1 mV	13.9 mV	8.8 mV	Pass
50% Load	21.5 mV	18.3 mV	15.6 mV	10.6 mV	Pass
60% Load	23.6 mV	18.4 mV	15.8 mV	11.1 mV	Pass
80% Load	26.4 mV	20.6 mV	19.8 mV	13.2 mV	Pass
100% Load	31.9 mV	24.4 mV	21.2 mV	16.6 mV	Pass
110% Load	33.4 mV	24.6 mV	21.9 mV	16.8 mV	Pass
Crossload 1	22.6 mV	19.1 mV	20.2 mV	10.5 mV	Pass
Crossload 2	28.5 mV	19.8 mV	12.4 mV	9.5 mV	Pass

ACRF topologies usually don't produce such tight ripple suppression, but be quiet! and FSP managed to create a ripple-proof PSU. Ripple on the +12V rail was really low and very good on all other rails. As it seems, the mixture of polymer and electrolytic caps did a fine job here, and the caps will hopefully keep their performance as time goes on.

Ripple at Full Load

In the following oscilloscope screenshots, you can see the AC ripple and noise the main rails registered (+12V, 5V, 3.3V, and 5VSB). The bigger the fluctuations on the oscilloscope's screen, the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals 0.01 V) as the standard for all measurements.