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Load Regulation, Hold-Up Time And Inrush Current

To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units.

Corsair CS 450 Watt ATX Modular PSU

Seasonic SSR-450RM

Thermaltake TR2 Gold 450W

Primary Rails And 5VSB Load Regulation

Load Regulation testing is detailed here.

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Hold-Up Time

Our hold-up time tests are described in detail here.

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As we expected, the low-capacity bulk cap doesn't allow for better results in these tests, so the PSU fails all three of them.

Inrush Current

For details on our inrush current testing, please click here.

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Inrush current is a little higher than what we expected from such a low-capacity PSU. However it won't cause any problems.

Load Regulation And Efficiency Measurements

The first set of tests explores voltage rail stability and efficiency. The applied load equals (approximately) 10 to 110 percent of the supply's maximum in increments of 10 percentage points.

We conducted two additional tests. During the first, we stressed the two minor rails (5V and 3.3V) with a high load, while the load at +12V was only 0.10A. This test reveals whether a PSU is Haswell-ready or not. In the second test, we determined the maximum load the +12V rail could handle with minimal load on the minor rails.

Test #	12V	5V	3.3V	5VSB	DC/AC (Watts)	Efficiency	Fan Speed (RPM)	Noise (dB[A])	Temps (In/Out)	PF/AC Volts
1	1.924A	1.983A	1.951A	0.985A	44.75	82.47%	695	26.2	37.22 °C	0.958
1	12.044V	5.041V	3.378V	5.067V	54.26	82.47%	695	26.2	40.43 °C	115.1V
2	4.897A	2.980A	2.933A	1.184A	89.73	87.50%	695	26.2	38.20 °C	0.986
2	12.026V	5.024V	3.372V	5.048V	102.55	87.50%	695	26.2	41.75 °C	115.1V
3	8.227A	3.498A	3.445A	1.385A	134.87	89.01%	695	26.2	38.62 °C	0.987
3	12.007V	5.010V	3.363V	5.037V	151.53	89.01%	695	26.2	42.97 °C	115.1V
4	11.557A	4.004A	3.930A	1.589A	179.73	89.75%	695	26.2	39.95 °C	0.988
4	11.990V	4.995V	3.356V	5.018V	200.25	89.75%	695	26.2	44.73 °C	115.1V
5	14.558A	5.020A	4.923A	1.800A	224.73	89.96%	735	23.5	40.93 °C	0.989
5	11.970V	4.975V	3.351V	4.997V	249.81	89.96%	735	23.5	46.53 °C	115.1V
6	17.567A	6.052A	5.914A	2.007A	269.69	89.79%	865	28.5	41.71 °C	0.989
6	11.949V	4.957V	3.347V	4.977V	300.35	89.79%	865	28.5	48.17 °C	115.1V
7	20.586A	7.088A	6.911A	2.215A	314.63	89.43%	960	31.1	42.54 °C	0.988
7	11.929V	4.936V	3.341V	4.957V	351.83	89.43%	960	31.1	50.13 °C	115.1V
8	23.634A	8.147A	7.914A	2.428A	359.70	88.92%	1060	32.4	43.24 °C	0.988
8	11.903V	4.912V	3.335V	4.933V	404.51	88.92%	1060	32.4	51.86 °C	115.1V
9	27.100A	8.677A	8.443A	2.437A	404.70	88.41%	1165	35.0	44.50 °C	0.987
9	11.886V	4.899V	3.327V	4.920V	457.78	88.41%	1165	35.0	54.71 °C	115.1V
10	30.533A	9.208A	8.963A	2.545A	449.52	87.83%	1240	37.4	45.33 °C	0.985
10	11.867V	4.888V	3.313V	4.905V	511.81	87.83%	1240	37.4	57.47 °C	115.1V
11	34.371A	9.224A	9.013A	2.549A	494.45	87.13%	1335	39.5	46.38 °C	0.983
11	11.849V	4.880V	3.295V	4.895V	567.51	87.13%	1335	39.5	60.39 °C	115.1V
CL1	0.099A	14.021A	14.004A	0.000A	117.77	83.83%	1100	32.6	44.19 °C	0.987
CL1	12.000V	4.928V	3.391V	5.041V	140.49	83.83%	1100	32.6	54.48 °C	115.1V
CL2	37.476A	1.003A	1.003A	1.001A	458.48	88.62%	1210	36.5	45.42 °C	0.985
CL2	11.880V	4.956V	3.291V	4.988V	517.37	88.62%	1210	36.5	57.78 °C	115.1V

Load regulation at +12V and 3.3V is satisfactory, while on the 5V and 5VSB rails it's average. When it comes to noise output, the HGX performs well since the fan spins slowly in most tests. Even in the worst-case overload test, noise doesn't exceed 40 dB(A). FSP arms this unit with a relaxed fan profile, so under normal conditions you won't hear the fan unless you're right on top of it.

Despite taxing conditions inside of our hot-box, the PSU satisfies the 80 PLUS Gold requirements in all three tests (20%, 50% and full load); it truly deserves its Gold rating.