Corsair RM750e 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% 4.442A 1.999A 1.997A 1.004A 75.008 84.969% 0 <6.0 46.54°C 0.97
12.024V 5.002V 3.304V 4.98V 88.275 40.01°C 114.84V
20% 9.905A 3A 2.999A 1.207A 149.951 88.477% 0 <6.0 47.9°C 0.983
12.020V 5V 3.301V 4.973V 169.482 40.82°C 114.82V
30% 15.725A 3.502A 3.502A 1.41A 224.961 90.971% 0 <6.0 50.82°C 0.985
12.013V 4.998V 3.299V 4.965V 247.292 41.45°C 114.77V
40% 21.564A 4.004A 4.005A 1.614A 300.055 91.207% 0 <6.0 51.82°C 0.988
12.004V 4.996V 3.296V 4.958V 328.982 41.71°C 114.75V
50% 27.017A 5.008A 5.012A 1.819A 374.526 90.956% 405 <6.0 42.23°C 0.99
11.993V 4.993V 3.293V 4.95V 411.765 50.42°C 114.72V
60% 32.515A 6.014A 6.02A 2A 449.292 90.56% 550 <6.0 42.78°C 0.992
11.982V 4.989V 3.289V 4.942V 496.124 55.17°C 114.7V
70% 38.023A 7.02A 7.03A 2.23A 524.291 89.971% 823 17.7 43.04°C 0.993
11.971V 4.986V 3.286V 4.933V 582.734 56.32°C 114.67V
80% 43.612A 8.027A 8.041A 2.334A 599.483 89.263% 1121 28.9 43.55°C 0.993
11.960V 4.983V 3.283V 4.927V 671.591 56.51°C 114.64V
90% 49.547A 8.533A 8.535A 2.439A 674.515 88.53% 1485 37.2 44.84°C 0.994
11.948V 4.98V 3.28V 4.92V 761.912 56.41°C 114.62V
100% 55.293A 9.041A 9.061A 3.062A 749.74 87.65% 1807 42.8 45.12°C 0.994
11.937V 4.977V 3.278V 4.899V 855.376 56.43°C 114.59V
110% 60.916A 10.051A 10.17A 3.065A 824.758 86.34% 2008 45.6 46.83°C 0.98
11.926V 4.974V 3.274V 4.895V 955.257 57.7°C 114.57V
CL1 0.117A 13.275A 13.299A 0A 111.295 82.521% 1107 28.7 42.05°C 0.98
12.012V 4.987V 3.286V 5.007V 134.869 52.45°C 114.84V
CL2 0.115A 20.035A 0A 0A 101.338 81.482% 1217 32.4 42.54°C 0.979
12.017V 4.989V 3.296V 5.011V 124.367 49.11°C 114.82V
CL3 0.115A 0A 20.08A 0A 67.382 76.282% 844 18.5 41.55°C 0.971
12.016V 4.998V 3.287V 5.01V 88.333 47.64°C 114.83V
CL4 62.731A 0A 0A 0A 749.525 88.603% 1506 37.6 45.53°C 0.994
11.948V 4.992V 3.292V 4.982V 845.931 54.27°C 114.58V

Load regulation is within 1% on all major rails.

Ripple Suppression

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 20.8 mV 14.1 mV 15.0 mV 13.7 mV Pass
20% Load 20.9 mV 14.5 mV 15.2 mV 14.6 mV Pass
30% Load 23.5 mV 14.9 mV 16.4 mV 14.8 mV Pass
40% Load 22.3 mV 15.9 mV 16.4 mV 15.1 mV Pass
50% Load 23.9 mV 15.6 mV 16.7 mV 16.5 mV Pass
60% Load 24.3 mV 15.1 mV 16.6 mV 15.8 mV Pass
70% Load 26.5 mV 16.1 mV 16.8 mV 19.6 mV Pass
80% Load 39.4 mV 25.9 mV 32.3 mV 21.4 mV Pass
90% Load 42.0 mV 25.8 mV 34.3 mV 21.7 mV Pass
100% Load 45.6 mV 25.7 mV 32.2 mV 22.8 mV Pass
110% Load 51.3 mV 25.5 mV 32.1 mV 24.8 mV Pass
Crossload 1 31.2 mV 15.6 mV 17.4 mV 12.2 mV Pass
Crossload 2 30.8 mV 17.6 mV 16.5 mV 11.9 mV Pass
Crossload 3 21.4 mV 14.5 mV 19.9 mV 11.5 mV Pass
Crossload 4 47.0 mV 24.8 mV 31.8 mV 17.6 mV Pass

Ripple suppression is good at 230V but not at 115V, especially at 3.3V. Apparently the higher energy losses at 115V affect ripple at high loads.

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One thought on “Corsair RM750e ATX v3.1 PSU Review

  1. Hmm good to see I could have bought a much better PSU then this one for €100 which I think is way too much for a PSU of this type. In a hurry so much I thought this was the successor of the RM750X especially because it’s ATX 3.1 and that suddenly matters now that it’s coming out that PSU suppliers did not produce PSU’s that were up to specs. I say buy the cheaper ones because PSU manufacturers stopped caring about airflow in the PSU’s, something that was unthinkable years back.

    Switching PSU’s need airflow/cooling when more then 150w needs to be supplied period. A spinning fan is the only thing that can supply airflow because convection cooling (like in amplifiers) is not possible in an ATX PSU. You could place the ATX PSU outside of the system and put a spinning fan on top of it. I do that. That’s the ONLY solution but that will not happen because folks adore especially the looks of the systems they’ve build and worship every part of it. Sleep well PC lovers knowing your overheated PSU will die while it has the potential to take every electronic part of the computer it feeds with it and more…..

    I’ve seen switching PSU’s in copying machines die with a bang loud as loud as an illegal fire cracker. Faulty firmware overloaded the high capacity condensator to the point of explosion. Short them while bulging, and being overloaded, and the aluminum shell can punch a crack in the wall or take out an eye. That’s the amount of power they hold. Those PSU’s are six times the size of the ATX PSU board that feeds a PC. They have LARGE and heavy heat sinks for the power transistors. An office building that burns down because of them makes the news big time. It won’t happen because these PSU have been produced with safety in mind.
    The PSU in your gaming PC on the other hand produces the same amount of power, have tiny, mini sized, heat sinks and no spinning or a too slow spinning fan so it overheats. Meanwhile the PSU manufacturers expect you to use their garbage for 10 years. That’s how much they care about your house. And that’s why it might be safer to buy a “moderate quality” (because the expensive ATX PSU’s have no better safety profile) and replace the dangerous thing within 5 years especially when the PSU stays on all the time. Those who do the latter should at least pull the power cord when leaving home.

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