In Win GreenMe 650 W Review

Name: In Win GreenMe 650 W
Brand: InWin

crmaris

on Sep 14th, 2012,

in Power Supplies.

Manufacturer: InWin

Performance Rating & Performance per Dollar »

Ripple Measurements

In the following table, you will see the ripple levels that we measured on the main rails of the GreenMe 650. According to the ATX specification, the limits are 120 mV (+12V) and 50 mV (5V, 3.3V, and 5VSB).

Ripple Measurements In Win GreenMe 650
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	14.0 mV	28.0 mV	25.2 mV	10.8 mV	Pass
40% Load	18.5 mV	30.2 mV	25.5 mV	10.9 mV	Pass
50% Load	21.7 mV	30.8 mV	25.8 mV	11.9 mV	Pass
60% Load	25.3 mV	31.1 mV	26.6 mV	12.0 mV	Pass
80% Load	38.4 mV	32.2 mV	27.4 mV	12.2 mV	Pass
100% Load	59.2 mV	32.4 mV	27.6 mV	13.3 mV	Pass
Crossload 1	13.3 mV	28.2 mV	24.4 mV	9.7 mV	Pass
Crossload 2	61.4 mV	30.6 mV	28.1 mV	11.4 mV	Pass

Ripple at +12V was at good levels up to 80% load, but increased significantly at full load. However, it still remained at about half of the ATX limit. Apparently, we heavily stressed the unit during the full load test with 45°C ambient and it complained with a sudden 20mV ripple increase. Thankfully, ripple on the minor rails didn't register sudden increases during the full load test, but we would like it to be a little lower at 5V. We shouldn't forget that we are not testing a high-end unit, and our expectations should remain reasonable. The best performer here surely is the 5VSB rail which featured absolutely great ripple suppression.

Ripple at Full Load

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