Corsair RMx Series 850 W (2021) Review

Name: Corsair RMx Series 850 W (2021)
Brand: Corsair
Price: 150 USD

crmaris

on Mar 30th, 2021,

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 essential characteristic for every power supply because it allows for constant voltage levels despite changes in load.

5VSB Regulation

Load regulation is satisfactory at +12 V and 5 V and tight at 3.3 V.

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 RM850x
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	4.5 mV	3.5 mV	2.7 mV	5.3 mV	Pass
20% Load	7.1 mV	3.4 mV	3.2 mV	5.8 mV	Pass
30% Load	7.0 mV	3.7 mV	2.8 mV	5.3 mV	Pass
40% Load	6.4 mV	3.6 mV	3.2 mV	5.3 mV	Pass
50% Load	6.1 mV	6.1 mV	7.4 mV	7.3 mV	Pass
60% Load	5.5 mV	3.9 mV	3.4 mV	5.3 mV	Pass
70% Load	5.6 mV	4.3 mV	3.8 mV	6.1 mV	Pass
80% Load	5.9 mV	4.7 mV	7.1 mV	5.8 mV	Pass
90% Load	5.8 mV	5.2 mV	8.1 mV	5.9 mV	Pass
100% Load	9.1 mV	5.5 mV	8.8 mV	6.8 mV	Pass
110% Load	8.9 mV	5.4 mV	7.4 mV	6.5 mV	Pass
Crossload 1	5.0 mV	4.3 mV	7.5 mV	5.9 mV	Pass
Crossload 2	8.2 mV	5.1 mV	6.0 mV	6.3 mV	Pass