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Corsair SF850L SFX-L PSU Review – The BEST SFX-L PSU

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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% 6.486A 1.969A 1.994A 0.991A 100.018 89.065% 0 <6.0 44.78°C 0.967
12.090V 5.079V 3.31V 5.046V 112.293 40.50°C 114.91V
20% 13.995A 2.955A 2.993A 1.191A 199.98 91.760% 0 <6.0 45.52°C 0.966
12.081V 5.077V 3.307V 5.036V 217.936 40.81°C 114.87V
30% 21.864A 3.45A 3.496A 1.393A 300.052 92.366% 535 7.4 41.11°C 0.978
12.074V 5.073V 3.303V 5.027V 324.858 46.28°C 114.85V
40% 29.704A 3.943A 3.999A 1.595A 399.7 92.352% 806 21.2 41.72°C 0.985
12.069V 5.073V 3.301V 5.017V 432.802 47.26°C 114.83V
50% 37.205A 4.929A 5.003A 1.798A 499.435 91.986% 1204 34.2 42.29°C 0.989
12.066V 5.073V 3.298V 5.007V 542.943 48.27°C 114.8V
60% 44.726A 5.915A 6.008A 2A 599.952 90.893% 1751 43.4 42.63°C 0.991
12.077V 5.073V 3.296V 4.996V 660.067 48.85°C 114.78V
70% 52.234A 6.905A 7.017A 2.207A 699.694 90.231% 1936 45.6 43.41°C 0.993
12.072V 5.071V 3.293V 4.986V 775.442 50.43°C 114.77V
80% 59.814A 7.895A 8.025A 2.311A 799.717 89.501% 2120 48.3 43.76°C 0.994
12.067V 5.069V 3.289V 4.977V 893.533 51.86°C 114.74V
90% 67.728A 8.389A 8.519A 2.416A 899.499 88.676% 2314 49.7 44.30°C 0.995
12.063V 5.067V 3.287V 4.968V 1014.367 53.43°C 114.71V
100% 75.439A 8.884A 9.044A 3.031A 999.532 87.638% 2373 50.4 46.31°C 0.995
12.061V 5.067V 3.284V 4.95V 1140.523 56.39°C 114.68V
110% 83.080A 9.873A 10.148A 3.036A 1100.146 86.673% 2365 50.4 47.11°C 0.996
12.058V 5.066V 3.281V 4.941V 1269.317 58.00°C 114.64V
CL1 0.116A 17.818A 18.026A 0A 151.325 83.453% 1772 43.6 42.84°C 0.964
12.088V 5.07V 3.306V 5.046V 181.335 48.33°C 114.9V
CL2 0.116A 19.73A 0A 0A 101.427 82.910% 1323 36.0 43.61°C 0.966
12.096V 5.07V 3.314V 5.059V 122.337 50.65°C 114.91V
CL3 0.115A 0A 19.956A 0A 67.383 79.109% 1462 38.8 44.00°C 0.947
12.094V 5.083V 3.307V 5.055V 85.179 52.19°C 114.91V
CL4 82.905A 0A 0A 0A 999.906 88.645% 2264 49.1 45.94°C 0.995
12.061V 5.073V 3.287V 5.009V 1128.006 55.89°C 114.69V

Load regulation is super tight, and I didn’t notice any issues at 12V with 230V input, as I did in the SF1000L.

Ripple Suppression

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 6.9 mV 5.8 mV 5.4 mV 3.1 mV Pass
20% Load 9.2 mV 8.2 mV 7.7 mV 3.3 mV Pass
30% Load 8.4 mV 6.6 mV 6.3 mV 3.5 mV Pass
40% Load 8.6 mV 7.4 mV 6.8 mV 4.2 mV Pass
50% Load 9.0 mV 8.4 mV 7.4 mV 4.8 mV Pass
60% Load 10.6 mV 9.1 mV 9.6 mV 5.6 mV Pass
70% Load 10.3 mV 9.0 mV 8.8 mV 6.2 mV Pass
80% Load 10.6 mV 10.5 mV 10.5 mV 6.8 mV Pass
90% Load 11.4 mV 11.6 mV 10.5 mV 7.1 mV Pass
100% Load 17.8 mV 14.0 mV 11.7 mV 7.7 mV Pass
110% Load 18.5 mV 12.6 mV 12.7 mV 8.1 mV Pass
Crossload 1 12.3 mV 14.5 mV 12.6 mV 12.6 mV Pass
Crossload 2 10.5 mV 10.9 mV 8.0 mV 10.2 mV Pass
Crossload 3 9.5 mV 9.8 mV 9.5 mV 11.4 mV Pass
Crossload 4 16.6 mV 8.4 mV 10.1 mV 9.6 mV Pass

Ripple suppression is good on all rails.

Pages:
  1. Prologue & Technical specifications
  2. Box & Bundle, Product Photos & Cables
  3. Part Analysis
  4. Load Regulation & Ripple Suppression
  5. Transient Response
  6. Hold-Up time, Inrush Current & PSU Timings
  1. Efficiency, Power Factor, 5VSB & Vampire Power
  2. Protection Features
  3. Noise Output
  4. Overall Performance
  5. Epilogue
Pages: 1 2 3 4 5 6 7 8 9 10 11
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2 thoughts on “Corsair SF850L SFX-L PSU Review – The BEST SFX-L PSU”

  1. Is the included 12VHPWR cable sufficient/safe for powering an RTX 4090 FE or should a 3×8 cable/adapter still be used? If it is sufficient and totally safe, does the manual specify which ports to use or doesn’t that matter?

    Reply

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