Raijintek Ermis 550B PSU Review

Name: Raijintek Ermis 550B PSU
Brand: Raijintek
Price: 65 USD

crmaris

on Apr 11th, 2022,

in Power Supplies.

Manufacturer: Raijintek

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

5VSB Regulation

Load regulation is tight enough at +12 V and 5 V, and average on the other two 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 a vital role in overall system stability, especially when it is overclocked. According to the ATX specification, the ripple limits are 120 mV (+12V) and 50 mV (+5V, +3.3V, and 5VSB).

Ripple Measurements - Raijintek Ermis 550B
Test	12V	5V	3.3V	5VSB	Pass/Fail
10% Load	26.0 mV	20.6 mV	14.4 mV	20.1 mV	Pass
20% Load	24.2 mV	20.6 mV	14.9 mV	22.9 mV	Pass
30% Load	29.6 mV	22.3 mV	16.6 mV	25.5 mV	Pass
40% Load	26.2 mV	24.3 mV	19.2 mV	27.6 mV	Pass
50% Load	29.0 mV	25.8 mV	20.4 mV	31.4 mV	Pass
60% Load	38.4 mV	27.2 mV	22.7 mV	30.5 mV	Pass
70% Load	32.0 mV	29.2 mV	24.2 mV	33.0 mV	Pass
80% Load	37.9 mV	32.0 mV	28.6 mV	35.7 mV	Pass
90% Load	42.2 mV	34.3 mV	28.8 mV	43.2 mV	Pass
100% Load	54.8 mV	45.1 mV	36.0 mV	59.4 mV	Fail
110% Load	54.1 mV	46.7 mV	40.2 mV	60.8 mV	Fail
Crossload 1	27.8 mV	29.1 mV	20.8 mV	32.8 mV	Pass
Crossload 2	27.4 mV	31.8 mV	14.0 mV	38.2 mV	Pass
Crossload 3	28.8 mV	18.7 mV	25.4 mV	28.5 mV	Pass
Crossload 4	43.2 mV	39.8 mV	33.1 mV	37.7 mV	Pass