Chieftronic SteelPower 750 W Review

Name: Chieftronic SteelPower 750 W
Brand: Chieftronic
Price: 100 USD

crmaris

on Nov 23rd, 2021,

in Power Supplies.

Manufacturer: Chieftronic

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 on every rail but 5VSB, where regulation is not that important as long as the voltage is within the limit.

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 - Chieftronic SteelPower 750W
Test	12V	5V	3.3V	5VSB	Pass/Fail
10% Load	6.9 mV	10.0 mV	4.5 mV	10.9 mV	Pass
20% Load	14.9 mV	10.1 mV	5.6 mV	15.6 mV	Pass
30% Load	41.4 mV	12.1 mV	6.8 mV	12.1 mV	Pass
40% Load	35.0 mV	27.2 mV	10.6 mV	17.4 mV	Pass
50% Load	31.9 mV	14.2 mV	8.1 mV	18.4 mV	Pass
60% Load	26.3 mV	18.8 mV	12.2 mV	21.1 mV	Pass
70% Load	24.5 mV	20.9 mV	15.6 mV	23.0 mV	Pass
80% Load	26.2 mV	20.5 mV	18.6 mV	24.5 mV	Pass
90% Load	27.9 mV	29.7 mV	22.7 mV	29.8 mV	Pass
100% Load	45.9 mV	38.7 mV	33.2 mV	31.6 mV	Pass
110% Load	47.9 mV	31.8 mV	30.5 mV	36.3 mV	Pass
Crossload 1	11.9 mV	10.4 mV	14.4 mV	8.4 mV	Pass
Crossload 2	17.1 mV	10.9 mV	6.3 mV	7.1 mV	Pass
Crossload 3	11.9 mV	10.3 mV	20.5 mV	6.8 mV	Pass
Crossload 4	45.8 mV	29.5 mV	19.6 mV	25.2 mV	Pass

Ripple suppression is good at up to 90% load. With full load, ripple increases notably on all rails. While still within limits, ripple suppression could be better, especially at 5 V.