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Load Regulation, Hold-Up Time & Inrush Current

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

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Corsair SF600 Platinum

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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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The hold-up time we measure is accurate, as is the power-good signal.

Inrush Current

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

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Inrush current is low with both voltage inputs.

Load Regulation And Efficiency Measurements

The first set of tests reveals the stability of the voltage rails and the HCG850’s efficiency. The applied load equals (approximately) 10 to 110 percent of the PSU's maximum load 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 0.1A. This test reveals whether a PSU is compatible with Intel's C6/C7 sleep states or not. In the second test, we determined the maximum load the +12V rail could handle with minimal load on the minor rails.

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Test #	12V	5V	3.3V	5VSB	DC/AC (Watts)	Efficiency	Fan Speed	PSU Noise	Temps (In/Out)	PF/AC Volts
1	5.199A	1.984A	1.976A	0.986A	84.852	86.522%	478 RPM	9.6 dB(A)	38.13°C	0.969
12.165V	5.048V	3.336V	5.071V	98.070	44.56°C	115.05V
2	11.414A	2.968A	2.967A	1.186A	169.719	89.731%	496 RPM	9.8 dB(A)	38.87°C	0.983
12.165V	5.045V	3.334V	5.061V	189.141	45.77°C	115.03V
3	17.989A	3.473A	3.475A	1.385A	254.940	90.470%	512 RPM	11.5 dB(A)	39.34°C	0.986
12.166V	5.042V	3.332V	5.051V	281.796	46.80°C	115.01V
4	24.544A	3.963A	3.960A	1.586A	339.758	90.397%	515 RPM	11.5 dB(A)	39.86°C	0.988
12.166V	5.040V	3.330V	5.041V	375.852	48.19°C	115.03V
5	30.752A	4.966A	4.953A	1.786A	424.648	89.976%	525 RPM	11.7 dB(A)	40.19°C	0.988
12.167V	5.038V	3.328V	5.031V	471.958	49.41°C	115.02V
6	36.975A	5.953A	5.950A	1.991A	509.639	89.328%	823 RPM	20.5 dB(A)	41.32°C	0.988
12.167V	5.036V	3.326V	5.020V	570.525	51.06°C	115.03V
7	43.194A	6.954A	6.945A	2.196A	594.588	88.574%	1185 RPM	30.2 dB(A)	42.02°C	0.989
12.166V	5.034V	3.324V	5.008V	671.293	52.26°C	115.03V
8	49.424A	7.948A	7.945A	2.400A	679.571	87.755%	1646 RPM	40.5 dB(A)	43.61°C	0.990
12.164V	5.032V	3.322V	4.996V	774.400	54.51°C	115.01V
9	56.066A	8.454A	8.458A	2.400A	764.513	86.908%	2053 RPM	46.0 dB(A)	44.65°C	0.990
12.163V	5.030V	3.320V	4.991V	879.680	56.17°C	115.03V
10	62.450A	8.953A	8.947A	3.015A	849.284	85.787%	2130 RPM	49.1 dB(A)	44.98°C	0.991
12.163V	5.029V	3.318V	4.973V	989.993	56.98°C	115.01V
11	69.430A	8.956A	8.952A	3.017A	934.187	84.431%	2150 RPM	49.2 dB(A)	46.28°C	0.992
12.163V	5.028V	3.317V	4.967V	1106.448	59.09°C	115.03V
CL1	0.100A	12.013A	12.006A	0.005A	101.864	84.708%	520 RPM	11.6 dB(A)	41.49°C	0.978
12.167V	5.043V	3.335V	5.087V	120.253	51.22°C	115.08V
CL2	69.958A	1.002A	1.002A	1.002A	864.308	85.962%	2140 RPM	49.1 dB(A)	45.97°C	0.991
12.163V	5.034V	3.323V	5.026V	1005.453	55.86°C	115.04V

Load regulation on the +12V rail is flawless, and it's fairly tight on the minor rails. The HCG850's efficiency satisfies the 80 PLUS Gold standard's requirements with 20% of its maximum-rated load, it's a hair away with 50% load, and the PSU falls notably under its 87% requirement with full load. Then again, we run our tests at a much higher ambient temperature than the 80 PLUS organization.

At up to 60% of its maximum load, this PSU is downright quiet. Afterward, it starts to make its presence known. The HCG850 is particularly loud in the last three tests, where its fan spins at high speeds.

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