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Corsair SF600 Power Supply Review

We recently evaluated Corsair's SF450, which left a good impression on us. Now it's time to test the family's flagship SF600, which can deliver 150W more power using exactly the same cable configuration.

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. 

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 is longer than the ATX spec's 17ms requirement, while the power-good signal's hold-up time also falls within spec. The single bulk cap obviously has enough capacity for this PSU's needs.

When input voltage is removed, we do observe a brief overshoot at +12V, though it's well under the ATX spec's limit (13.2V).

Inrush Current

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

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The inrush current is a little higher than expected, mostly with 230VAC input.

Load Regulation And Efficiency Measurements

The first set of tests reveals the stability of the voltage rails and the PSU's efficiency. The applied load equals (approximately) 10 to 110 percent of the maximum load the supply can handle, 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 #12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed (RPM)Noise (dB[A])Temps (In/Out)PF/AC Volts
13.190A1.985A1.976A0.990A59.7983.00%227035.038.26 °C0.975
11.976V5.042V3.335V5.041V72.0442.23 °C115.1V
27.421A2.971A2.974A1.191A119.7088.22%240037.138.69 °C0.981
11.973V5.034V3.328V5.035V135.6943.05 °C115.1V
312.014A3.482A3.490A1.391A179.8989.98%264038.339.81 °C0.978
11.969V5.028V3.321V5.028V199.9244.50 °C115.1V
416.596A3.983A3.980A1.589A239.7490.68%286040.339.93 °C0.981
11.965V5.021V3.315V5.021V264.3744.91 °C115.1V
520.836A4.979A4.988A1.795A299.6890.70%320542.540.90 °C0.985
11.961V5.015V3.307V5.013V330.4146.40 °C115.1V
625.081A5.989A6.001A1.995A359.6990.19%364045.041.56 °C0.988
11.958V5.008V3.299V5.005V398.8047.54 °C115.1V
729.320A7.005A7.016A2.201A419.6789.84%375045.542.05 °C0.991
11.956V5.000V3.292V4.998V467.1348.40 °C115.1V
833.561A8.012A8.035A2.403A479.6389.38%375045.544.06 °C0.992
11.956V4.991V3.285V4.990V536.6251.14 °C115.1V
938.240A8.522A8.570A2.405A539.6988.82%375045.544.61 °C0.993
11.954V4.986V3.278V4.985V607.6052.17 °C115.1V
1042.869A9.042A9.073A2.510A599.6488.20%375045.547.18 °C0.994
11.953V4.980V3.273V4.980V679.8755.69 °C115.1V
1147.900A9.052A9.086A2.511A659.5787.66%375045.547.23 °C0.995
11.949V4.974V3.268V4.975V752.4355.93 °C115.0V
CL10.101A14.022A14.005A0.005A117.8383.84%375045.544.65 °C0.982
11.980V5.014V3.305V5.035V140.5450.14 °C115.1V
CL258.289A1.003A1.004A1.002A709.9387.66%375045.546.81 °C0.996
11.951V4.988V3.289V5.003V809.8454.71 °C115.1V

Load regulation at +12V is tight. It's also good on the minor rails, remaining within 2 percent. This PSU easily meets the 80 PLUS Gold requirements, even in hotter-than-normal ambient environments. That this platform is highly resilient to elevated temperatures means a lot, since the airflow in a compact chassis isn't going to be as good as larger ATX cases.

The PSU's fan spins quickly to cope with increased thermal loads. Naturally, this leads to a lot of noise. But we've seen ATX PSUs with larger fans that get a lot louder under similar conditions. Still, given our recent experience with the SF450, we think Corsair went too far with the SF600's fan profile. The company likely has room to relax it a bit.