Cougar LX Series 600 W Review

Name: Cougar LX Series 600 W
Brand: Cougar

crmaris

on Aug 18th, 2016,

in Power Supplies.

Manufacturer: Cougar

Protection Features Evaluation »

Ripple Measurements

You will see the ripple levels we measured on the rails of the LX600 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 - Cougar LX600
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	8.9 mV	10.6 mV	23.6 mV	13.5 mV	Pass
20% Load	10.0 mV	10.8 mV	25.9 mV	13.6 mV	Pass
30% Load	11.7 mV	12.6 mV	26.2 mV	16.1 mV	Pass
40% Load	13.7 mV	12.8 mV	26.6 mV	19.3 mV	Pass
50% Load	16.0 mV	14.6 mV	28.2 mV	23.5 mV	Pass
60% Load	17.7 mV	16.7 mV	29.4 mV	24.0 mV	Pass
70% Load	20.7 mV	17.4 mV	34.6 mV	25.2 mV	Pass
80% Load	23.9 mV	18.1 mV	36.3 mV	28.7 mV	Pass
90% Load	28.7 mV	19.3 mV	38.8 mV	31.2 mV	Pass
100% Load	34.0 mV	22.3 mV	43.4 mV	39.2 mV	Pass
110% Load	40.4 mV	24.2 mV	45.9 mV	42.3 mV	Pass
Crossload 1	13.3 mV	17.4 mV	52.1 mV	18.3 mV	Fail
Crossload 2	34.8 mV	19.7 mV	32.0 mV	32.5 mV	Pass

Ripple suppression at +12V and 5V is very good, but ripple on the 3.3V rail is actually very close to the limit in the full load test. In the CL1 test, the 3.3V rail is also clearly over its limit since it fails to keep ripple below 50 mV. What matters the most to a contemporary PSU, however, is its +12V performance, and it performed pretty well in these tests.

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.