Corsair HXi Series 750 W Review

Name: Corsair HXi Series 750 W
Brand: Corsair

crmaris

on Nov 12th, 2014,

in Power Supplies.

Manufacturer: Corsair

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

Ripple Measurements

You will see the ripple levels we measured on the HX750i'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 - Corsair HX750i
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	11.0 mV	4.0 mV	13.1 mV	3.0 mV	Pass
20% Load	12.6 mV	4.3 mV	12.6 mV	3.4 mV	Pass
30% Load	14.1 mV	4.5 mV	13.1 mV	3.4 mV	Pass
40% Load	13.7 mV	8.0 mV	25.2 mV	7.1 mV	Pass
50% Load	14.9 mV	5.0 mV	15.0 mV	4.6 mV	Pass
60% Load	15.9 mV	5.0 mV	15.1 mV	5.2 mV	Pass
70% Load	17.2 mV	6.0 mV	17.0 mV	5.8 mV	Pass
80% Load	19.1 mV	6.4 mV	17.4 mV	7.6 mV	Pass
90% Load	21.1 mV	6.7 mV	19.4 mV	6.8 mV	Pass
100% Load	22.8 mV	7.7 mV	19.5 mV	7.6 mV	Pass
110% Load	25.1 mV	7.8 mV	19.9 mV	8.0 mV	Pass
Crossload 1	17.0 mV	6.7 mV	14.9 mV	5.2 mV	Pass
Crossload 2	22.2 mV	6.8 mV	18.8 mV	7.2 mV	Pass

Ripple suppression was excellent on all rails, with 5V and 5VSB providing near-perfect DC outputs. Even our 110% load test with extremely tough operating conditions couldn't make the HX750i break a sweat. On the contrary, its main rail, +12V, only had close to 25 mV ripple, a performance level only incredibly well-designed platforms exhibit. CWT's engineers did a hell of a job with this platform, and we can easily state that they matched Delta's and Super Flower's performance in this department.

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.