ADATA HM Series 650 W Review

Name: ADATA HM Series 650 W
Brand: ADATA

crmaris

on Jul 29th, 2011,

in Power Supplies.

Manufacturer: ADATA

Value & Conclusion »

Ripple Measurements

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

Ripple Measurements
Test	12 V	5 V	3.3 V	Pass/Fail
20% Load	8.2 mV	7.0 mV	7.0 mV	Pass
40% Load	12.0 mV	12.2 mV	8.8 mV	Pass
50% Load	14.2 mV	15.2 mV	10.4 mV	Pass
60% Load	16.0 mV	16.2 mV	11.0 mV	Pass
80% Load	19.8 mV	16.8 mV	13.0 mV	Pass
100% Load	26.6 mV	17.6 mV	14.6 mV	Pass
Crossload 1	19.6 mV	19.4 mV	10.6 mV	Pass
Crossload 2	27.4 mV	14.8 mV	16.2 mV	Pass

Ripple/noise suppression at +12V is very good. The same applies to the minor rails where we didn't record any reading over 20mV. CWT did a very good job with ripple suppression of their PSH II platform, as it seems.

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). 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 to 0.01V) as standard but sometimes we are forced to use 0.02 V/Div, meaning that the fluctuations will look smaller but actually this wont be the case.