Corsair HX1000 PSU Review

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. 


Primary Rails And 5VSB Load Regulation

Load Regulation testing is detailed here.

Hold-Up Time

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

The hold-up time we measured is pretty long, and the power-good signal is highly accurate (it drops 9.4ms before the rails go out of spec).

Inrush Current

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

Inrush current is low with 115V input. But that's not the case with 230V, where we measure over 60A.

Load Regulation And Efficiency Measurements

The first set of tests reveals the stability of the voltage rails and the HX1000'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.

Test #12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed
PSU Noise
Temps (In/Out)PF/AC Volts
16.477A1.998A1.998A1.001A99.83587.999%0 RPM
<6.0 dB(A)
213.993A2.990A3.003A1.201A199.66991.302%0 RPM<6.0 dB(A)46.58°C0.991
321.890A3.498A3.522A1.405A299.87192.153%0 RPM<6.0 dB(A)47.18°C0.995
429.785A3.400A4.013A1.608A399.68392.155%0 RPM<6.0 dB(A)48.26°C0.996
537.367A4.999A5.023A1.811A499.65291.626%0 RPM<6.0 dB(A)49.15°C0.998
644.960A6.011A6.035A2.015A599.60891.034%700 RPM19 dB(A)42.99°C0.998
752.569A7.016A7.052A2.220A699.53290.385%845 RPM22.2 dB(A)43.29°C0.998
860.200A8.028A8.070A2.426A799.45089.717%950 RPM25.5 dB(A)44.22°C0.998
968.280A8.538A8.597A2.430A899.42888.817%1060 RPM27.8 dB(A)45.38°C0.998
1076.123A9.055A9.098A3.050A999.25887.817%1200 RPM31.7 dB(A)45.46°C0.998
1184.594A9.060A9.106A3.051A1099.18286.891%1280 RPM33.4 dB(A)46.57°C0.998
CL10.099A18.028A18.000A0.004A150.10583.097%1030 RPM27.2 dB(A)45.57°C0.986
CL283.247A1.004A1.002A1.002A1008.31988.177%1170 RPM31.1 dB(A)46.34°C0.998

The +12V rail has tight enough load regulation, although it's not as good as EVGA's 1000 G3 and Seasonic's 1000W Prime Gold. Both minor rails are close to 1% deviation, while the 5VSB rail lands within 2%.

We observe high efficiency levels, too. It's only during our full-load test that the HX1000 lands ~1% short of its corresponding 80 PLUS limit (though that's defined at a much lower ambient temperature than what we use for testing).

The HX1000 can surely handle elevated operating temperatures. This much becomes clear in our overload test, where the PSU delivers 1.1kW at 46.6°C for a prolonged period. On top of that, the fan profile is highly relaxed. It's only during the full load test that output noise exceeds 30 dB(A). This is a really quiet PSU, even under tough environmental conditions.

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