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

Fan Noise »

Efficiency

Using the results we gathered so far, we plotted a chart showing the PSU's efficiency at low loads and loads ranging from 10 to 110 percent of the maximum-rated capacity.

Efficiency is high enough with normal loads, but not as high in the light load ranges.

10%–110% Load Testing

These tests reveal the PSU's load regulation and efficiency levels under high ambient temperatures and show how the fan-speed profile behaves under harsh operating conditions.

Load Regulation & Efficiency Testing Data - Chieftronic SteelPower 750W
Test	12V	5V	3.3V	5VSB	Power (DC/AC)	Efficiency	Fan Speed	PSU Noise	Temp (In/Out)	PF/AC Volts
10%	4.438A	1.986A	1.966A	0.993A	75W	83.799%	717 RPM	22 dB(A)	40.72°C	0.841
10%	12.033V	5.035V	3.358V	5.037V	89.5W	83.799%	717 RPM	22 dB(A)	46.61°C	230.39V
20%	9.903A	2.982A	2.951A	1.197A	149.951W	88.677%	720 RPM	21.2 dB(A)	41.12°C	0.921
20%	12.022V	5.03V	3.355V	5.014V	169.097W	88.677%	720 RPM	21.2 dB(A)	47.51°C	230.39V
30%	15.723A	3.482A	3.445A	1.403A	224.957W	90.261%	726 RPM	19.2 dB(A)	41.44°C	0.948
30%	12.014V	5.026V	3.353V	4.991V	249.23W	90.261%	726 RPM	19.2 dB(A)	48.22°C	230.4V
40%	21.548A	3.983A	3.94A	1.611A	300.047W	90.643%	728 RPM	18.4 dB(A)	41.78°C	0.96
40%	12.012V	5.022V	3.351V	4.968V	331.019W	90.643%	728 RPM	18.4 dB(A)	49.04°C	230.4V
50%	27.014A	4.984A	4.929A	1.821A	374.617W	90.296%	732 RPM	19 dB(A)	42.11°C	0.967
50%	11.998V	5.017V	3.348V	4.944V	414.876W	90.296%	732 RPM	19 dB(A)	49.84°C	230.4V
60%	32.507A	5.987A	5.919A	2.001A	449.382W	89.693%	737 RPM	19.5 dB(A)	42.88°C	0.971
60%	11.989V	5.012V	3.345V	4.92V	501.021W	89.693%	737 RPM	19.5 dB(A)	51.34°C	230.41V
70%	38.019A	6.991A	6.911A	2.248A	524.481W	88.909%	1112 RPM	30.2 dB(A)	43.35°C	0.974
70%	11.977V	5.008V	3.343V	4.894V	589.909W	88.909%	1112 RPM	30.2 dB(A)	52.42°C	230.41V
80%	43.620A	7.996A	7.902A	2.36A	599.685W	88.135%	1487 RPM	37 dB(A)	43.92°C	0.976
80%	11.962V	5.004V	3.341V	4.873V	680.421W	88.135%	1487 RPM	37 dB(A)	53.55°C	230.41V
90%	49.572A	8.499A	8.386A	2.473A	674.729W	87.397%	2012 RPM	45.4 dB(A)	44.61°C	0.976
90%	11.947V	5.001V	3.339V	4.854V	772.03W	87.397%	2012 RPM	45.4 dB(A)	54.72°C	230.42V
100%	55.527A	9.004A	8.9A	2.585A	749.728W	86.868%	2277 RPM	49.7 dB(A)	45.51°C	0.976
100%	11.932V	4.998V	3.337V	4.836V	863.076W	86.868%	2277 RPM	49.7 dB(A)	56.05°C	230.41V
110%	61.156A	10.016A	9.989A	2.596A	824.863W	85.655%	2358 RPM	49.5 dB(A)	46.73°C	0.978
110%	11.921V	4.992V	3.333V	4.816V	963.016W	85.655%	2358 RPM	49.5 dB(A)	57.62°C	230.42V
CL1	0.116A	14.44A	14.271A	0A	121.301W	81.137%	739 RPM	19.5 dB(A)	42.1°C	0.913
CL1	12.048V	5V	3.342V	5.035V	149.503W	81.137%	739 RPM	19.5 dB(A)	49.85°C	230.43V
CL2	0.116A	19.996A	0A	0A	101.39W	79.713%	738 RPM	19.5 dB(A)	43.24°C	0.896
CL2	12.043V	5.001V	3.349V	5.059V	127.195W	79.713%	738 RPM	19.5 dB(A)	51.67°C	230.42V
CL3	0.116A	0A	19.707A	0A	67.387W	73.411%	720 RPM	21.2 dB(A)	44.84°C	0.847
CL3	12.048V	5.024V	3.349V	5.049V	91.794W	73.411%	720 RPM	21.2 dB(A)	54.2°C	230.42V
CL4	62.819A	0.001A	0A	0.004A	749.727W	87.447%	2346 RPM	49.7 dB(A)	45.93°C	0.978
CL4	11.934V	5.015V	3.346V	4.967V	857.357W	87.447%	2346 RPM	49.7 dB(A)	56.46°C	230.42V

The PSU didn't have a problem delivering its full power and more at high temperatures. PF readings with 230 V are low, though.

Light-Load Testing

In the following tests, we measure the PSU's efficiency at loads significantly lower than 10 percent of the maximum capacity—the lowest load the 80 PLUS standard measures. This is important for when a PC is idle with its power-saving features turned on.

Light Load Efficiency - Chieftronic SteelPower 750W
Test	12V	5V	3.3V	5VSB	Power (DC/AC)	Efficiency	Fan Speed	PSU Noise	Temp (In/Out)	PF/AC Volts
20W	1.233A	0.496A	0.491A	0.197A	19.999W	65.256%	712 RPM	22.4 dB(A)	36.83°C	0.563
20W	12.042V	5.041V	3.361V	5.082V	30.647W	65.256%	712 RPM	22.4 dB(A)	40.06°C	230.4V
40W	2.716A	0.694A	0.687A	0.296A	39.998W	72.806%	708 RPM	21.9 dB(A)	37.73°C	0.735
40W	12.036V	5.04V	3.36V	5.075V	54.938W	72.806%	708 RPM	21.9 dB(A)	41.61°C	230.4V
60W	4.200A	0.893A	0.884A	0.395A	59.996W	81.896%	709 RPM	21.9 dB(A)	38.46°C	0.801
60W	12.029V	5.039V	3.359V	5.067V	73.258W	81.896%	709 RPM	21.9 dB(A)	42.71°C	230.4V
80W	5.680A	1.092A	1.081A	0.494A	79.954W	85.036%	712 RPM	22.4 dB(A)	38.97°C	0.85
80W	12.028V	5.038V	3.359V	5.058V	94.023W	85.036%	712 RPM	22.4 dB(A)	43.86°C	230.39V

I would like to see higher efficiency with 20 W and 40 W loads.

Super Light-Load Testing

In the following tests, we measure the PSU's efficiency with a 10 W load if its maximum power is 500 W or less. If the PSU is stronger, we apply 2% of its maximum-rated-capacity load.

Super-Light Load Efficiency - Chieftronic SteelPower 750W
12V	5V	3.3V	5VSB	Power (DC/AC)	Efficiency	Fan Speed	PSU Noise	Temp (In/Out)	PF/AC Volts
1.064A	0.246A	0.246A	0.042A	15.086W	60.853%	695 RPM	19.4 dB(A)	25.84°C	0.848
12.029V	5.042V	3.361V	5.09V	24.79W	60.853%	695 RPM	19.4 dB(A)	28.35°C	115.2V

Efficiency should be above 70% in this test, but it barely exceeds 60%.

5VSB Efficiency

5VSB Efficiency - Chieftronic SteelPower 750W
Test #	5VSB	Power (DC/AC)	Efficiency	PF/AC Volts
1	0.1A	0.509W	70.065%	0.022
1	5.092V	0.726W	70.065%	230.38V
2	0.25A	1.272W	75.202%	0.051
2	5.086V	1.691W	75.202%	230.38V
3	0.55A	2.791W	78.672%	0.102
3	5.073V	3.548W	78.672%	230.39V
4	1A	5.055W	79.175%	0.168
4	5.054V	6.385W	79.175%	230.38V
5	1.5A	7.556W	79.334%	0.222
5	5.036V	9.524W	79.334%	230.38V
6	2.501A	12.489W	77.76%	0.295
6	4.995V	16.061W	77.76%	230.37V

5VSB efficiency is close to the middle of the pack.

Power Consumption in Idle and Standby

Idle / Standby - Chieftronic SteelPower 750W
Mode	12V	5V	3.3V	5VSB	Power (AC)	PF/AC Volts
Idle	12.079V	5.043V	3.361V	5.096V	3.727W	0.107
Idle	12.079V	5.043V	3.361V	5.096V	3.727W	230.42V
Standby					0.082W	0.002
Standby					0.082W	230.42V