Seasonic Snow Silent Series 1050 W Review

Name: Seasonic Snow Silent Series 1050 W
Brand: Seasonic

crmaris

on Mar 10th, 2015,

in Power Supplies.

Manufacturer: Seasonic

Performance Rating, Performance per Dollar, Noise & Efficiency Rating »

Ripple Measurements

You will see the ripple levels we measured on the Snow Silent-1050's rails 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 - Seasonic Snow Silent-1050
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	13.7 mV	9.9 mV	12.7 mV	6.1 mV	Pass
20% Load	18.1 mV	10.6 mV	13.3 mV	6.3 mV	Pass
30% Load	20.2 mV	11.6 mV	13.5 mV	7.2 mV	Pass
40% Load	21.0 mV	13.0 mV	14.3 mV	8.7 mV	Pass
50% Load	22.2 mV	14.4 mV	14.8 mV	10.1 mV	Pass
60% Load	25.4 mV	15.0 mV	15.2 mV	11.0 mV	Pass
70% Load	29.4 mV	15.8 mV	17.2 mV	13.0 mV	Pass
80% Load	32.0 mV	16.8 mV	16.4 mV	14.4 mV	Pass
90% Load	35.9 mV	18.0 mV	17.3 mV	15.2 mV	Pass
100% Load	40.5 mV	21.3 mV	18.8 mV	16.9 mV	Pass
110% Load	44.6 mV	24.0 mV	18.9 mV	18.5 mV	Pass
Crossload 1	17.1 mV	13.8 mV	18.1 mV	27.7 mV	Pass
Crossload 2	40.4 mV	19.2 mV	15.2 mV	17.1 mV	Pass

Ripple suppression was very good on the minor rails and satisfactory on the +12V rail. However, take into account the awesome performance of Super Flower units in these tests, with ripple at +12V not surpassing 20 mV in most cases, and we can't help but be picky by demanding that Seasonic, a company with a ton of experience, follow Super Flower's lead.

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.