Corsair SF850 ATX v3.1 PSU Review

Load Regulation

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
10% 5.211A 2.001A 1.991A 0.986A 85.001 89.681% 0 <6.0 44.32C 0.96
12.167V 4.996V 3.315V 5.071V 94.781 40.06C 114.83V
20% 11.426A 3.003A 2.988A 1.185A 169.931 92.259% 0 <6.0 45.49C 0.971
12.168V 4.994V 3.313V 5.064V 184.19 40.92C 114.81V
30% 17.987A 3.504A 3.487A 1.385A 254.935 92.947% 0 <6.0 46.39C 0.977
12.169V 4.994V 3.312V 5.056V 274.28 41.33C 114.77V
40% 24.552A 4.006A 3.986A 1.585A 340.021 93.015% 774 <6.0 41.92C 0.983
12.171V 4.993V 3.312V 5.048V 365.557 47.47C 114.76V
50% 30.757A 5.009A 4.986A 1.786A 424.819 92.733% 1128 13.9 42.03C 0.988
12.170V 4.991V 3.31V 5.04V 458.112 48.09C 114.72V
60% 36.942A 6.013A 5.987A 1.987A 509.353 92.333% 1519 24.2 42.94C 0.99
12.169V 4.989V 3.308V 5.033V 551.645 49.46C 114.69V
70% 43.190A 7.018A 6.988A 2.189A 594.661 91.815% 1906 30.9 43.16C 0.992
12.169V 4.988V 3.306V 5.025V 647.67 50.24C 114.66V
80% 49.434A 8.022A 7.99A 2.291A 679.5 90.788% 2656 39.6 43.60C 0.993
12.170V 4.986V 3.304V 5.019V 748.452 51.64C 114.63V
90% 56.077A 8.526A 8.477A 2.394A 764.935 90.161% 3044 42.0 44.76C 0.994
12.169V 4.984V 3.303V 5.013V 848.408 53.86C 114.61V
100% 62.456A 9.029A 8.995A 3.001A 849.747 89.409% 3401 45.3 45.47C 0.994
12.169V 4.983V 3.302V 4.999V 950.407 55.48C 114.57V
110% 68.701A 10.036A 10.091A 3.004A 934.316 88.575% 3731 47.4 46.78C 0.995
12.170V 4.982V 3.3V 4.994V 1054.834 57.68C 114.54V
CL1 0.114A 15.718A 15.637A 0A 131.298 85.635% 1496 23.4 40.02C 0.974
12.187V 4.982V 3.3V 5.079V 153.324 45.51C 114.82V
CL2 0.114A 20.048A 0A 0A 101.335 84.719% 2277 34.4 40.30C 0.975
12.180V 4.985V 3.312V 5.084V 119.614 47.37C 114.83V
CL3 0.113A 0A 19.988A 0A 67.383 79.91% 2067 33.3 40.82C 0.961
12.175V 4.993V 3.302V 5.084V 84.323 49.85C 114.84V
CL4 69.845A 0A 0A 0A 849.494 90.178% 2968 42.1 45.57C 0.994
12.163V 4.995V 3.313V 5.047V 942.029 56.49C 114.58V

Load regulation is tight on all rails.

Ripple Suppression

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 18.2 mV 18.6 mV 15.5 mV 12.5 mV Pass
20% Load 20.3 mV 18.2 mV 16.7 mV 11.9 mV Pass
30% Load 21.1 mV 18.0 mV 16.3 mV 12.3 mV Pass
40% Load 21.4 mV 18.3 mV 17.0 mV 12.0 mV Pass
50% Load 22.4 mV 18.7 mV 16.8 mV 11.9 mV Pass
60% Load 25.9 mV 18.4 mV 18.0 mV 12.7 mV Pass
70% Load 27.9 mV 18.3 mV 17.0 mV 13.3 mV Pass
80% Load 27.4 mV 19.0 mV 20.8 mV 12.3 mV Pass
90% Load 29.2 mV 19.1 mV 21.7 mV 14.1 mV Pass
100% Load 39.6 mV 22.4 mV 23.3 mV 13.6 mV Pass
110% Load 41.6 mV 20.9 mV 22.2 mV 13.8 mV Pass
Crossload 1 26.7 mV 22.7 mV 18.1 mV 28.3 mV Pass
Crossload 2 23.5 mV 21.1 mV 16.2 mV 26.8 mV Pass
Crossload 3 20.5 mV 18.2 mV 17.8 mV 26.8 mV Pass
Crossload 4 36.4 mV 20.1 mV 20.4 mV 29.2 mV Pass

Ripple suppression is decent.

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