Deepcool Quanta DQ1250 1250 W Review

Name: Deepcool Quanta DQ1250 1250 W
Brand: Deepcool

crmaris

on Jun 25th, 2014,

in Power Supplies.

Manufacturer: Deepcool

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

Ripple Measurements

You will see the ripple levels we measured on the DQ1250'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 - Deepcool DQ1250
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	12.3 mV	20.7 mV	20.3 mV	9.6 mV	Pass
20% Load	23.3 mV	22.0 mV	19.8 mV	10.3 mV	Pass
30% Load	37.5 mV	22.7 mV	20.9 mV	10.2 mV	Pass
40% Load	28.7 mV	24.2 mV	21.2 mV	11.8 mV	Pass
50% Load	30.4 mV	25.1 mV	25.3 mV	15.7 mV	Pass
60% Load	29.9 mV	26.9 mV	25.8 mV	19.0 mV	Pass
70% Load	31.8 mV	28.5 mV	29.6 mV	20.4 mV	Pass
80% Load	33.7 mV	30.9 mV	32.5 mV	23.4 mV	Pass
90% Load	37.1 mV	32.1 mV	36.2 mV	27.0 mV	Pass
100% Load	40.8 mV	34.3 mV	39.7 mV	31.0 mV	Pass
110% Load	45.2 mV	36.0 mV	40.2 mV	33.9 mV	Pass
Crossload 1	17.6 mV	25.8 mV	22.4 mV	11.0 mV	Pass
Crossload 2	40.2 mV	30.4 mV	33.7 mV	30.2 mV	Pass

Ripple suppression on the +12V rail was very good, but could be better on every other rail. Especially the 3.3V rail could do with less ripple. However, the +12V rail is the one that counts, and it performed incredibly well.

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.