BitFenix Whisper Series 850 W Review

Name: BitFenix Whisper Series 850 W
Brand: BitFenix

crmaris

on Dec 1st, 2016,

in Power Supplies.

Manufacturer: BitFenix

Protection Features Evaluation »

Ripple Measurements

You will see the ripple levels we measured on the rails of the BWG850M 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 - Bitfenix BWG850M
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	4.3 mV	7.0 mV	5.9 mV	9.2 mV	Pass
20% Load	20.4 mV	7.1 mV	5.0 mV	4.9 mV	Pass
30% Load	17.8 mV	8.7 mV	6.2 mV	6.4 mV	Pass
40% Load	15.0 mV	7.5 mV	5.3 mV	8.1 mV	Pass
50% Load	15.1 mV	7.8 mV	6.5 mV	10.0 mV	Pass
60% Load	15.1 mV	7.6 mV	5.6 mV	13.8 mV	Pass
70% Load	14.8 mV	8.4 mV	5.9 mV	20.4 mV	Pass
80% Load	15.4 mV	9.0 mV	6.8 mV	23.1 mV	Pass
90% Load	16.6 mV	9.3 mV	6.9 mV	20.3 mV	Pass
100% Load	16.9 mV	9.6 mV	7.5 mV	22.0 mV	Pass
110% Load	17.7 mV	9.7 mV	7.9 mV	16.8 mV	Pass
Crossload 1	7.3 mV	7.5 mV	6.2 mV	4.4 mV	Pass
Crossload 2	15.7 mV	10.8 mV	7.8 mV	16.8 mV	Pass

Ripple suppression is excellent. Only the 5VSB rail has slightly increased ripple, and only compared to the other rails. We also noticed a weirdly low ripple level on the rail in our overload test. In general, CWT did an amazing job here.

Ripple at Full Load

You can see the AC ripple and noise the main rails registered (+12V, 5V, 3.3V, and 5VSB) in the following oscilloscope screenshots. 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.