Corsair CX750F RGB 750 W Review

Name: Corsair CX750F RGB 750 W
Brand: Corsair
Price: 110 USD

crmaris

on Oct 5th, 2020,

in Power Supplies.

Manufacturer: Corsair

Efficiency »

Test Setup

Primary Rails Load Regulation

The following charts show the voltage values of the main rails, recorded over a range from 60 W to the maximum specified load, and the deviation (in percent) for the same load range. Tight load regulation is an important PSU characteristic because it allows for constant voltage levels despite changes in load.

5VSB Regulation

Load regulation is not tight on all rails.

Ripple Measurements

Ripple represents the AC fluctuations (periodic) and noise (random) found in the DC rails of PSUs. Ripple significantly decreases the life span of capacitors because it increases their temperature; a 10 °C increase can cut into a capacitor's life span by up to 50 percent. Ripple also plays an important role in overall system stability, especially when it is overclocked. The ripple limits according to the ATX specification are 120 mV (+12V) and 50 mV (+5V, +3.3V, and 5VSB).

Ripple Measurements - Corsair CX750F
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	14.6 mV	7.9 mV	10.9 mV	9.1 mV	Pass
20% Load	11.4 mV	7.9 mV	14.3 mV	8.2 mV	Pass
30% Load	12.2 mV	8.5 mV	11.4 mV	10.4 mV	Pass
40% Load	15.9 mV	9.0 mV	11.4 mV	9.5 mV	Pass
50% Load	18.2 mV	9.6 mV	13.3 mV	11.5 mV	Pass
60% Load	19.5 mV	10.4 mV	13.8 mV	13.4 mV	Pass
70% Load	21.2 mV	10.8 mV	15.8 mV	15.9 mV	Pass
80% Load	25.8 mV	12.1 mV	18.3 mV	17.4 mV	Pass
90% Load	32.1 mV	12.9 mV	18.2 mV	18.7 mV	Pass
100% Load	48.6 mV	15.2 mV	19.7 mV	22.4 mV	Pass
110% Load	56.8 mV	15.9 mV	20.9 mV	24.3 mV	Pass
Crossload 1	18.8 mV	11.1 mV	17.8 mV	5.8 mV	Pass
Crossload 2	46.9 mV	13.9 mV	17.9 mV	18.9 mV	Pass

Ripple suppression is good on the minor rails, but I would like to see less than 40 mV at full load for +12V. The notable increase in ripple from 90% to 100% load on this rail shows that it pushed the platform considerably.