Corsair RM750x 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% 4.417A 1.977A 2A 1.006A 75.009 84.949% 0 <6.0 47.17°C 0.973
12.090V 5.059V 3.3V 4.97V 88.298 40.48°C 115.16V
20% 9.850A 2.967A 3.003A 1.209A 149.974 89.158% 0 <6.0 46.72°C 0.987
12.087V 5.058V 3.297V 4.964V 168.213 40.65°C 115.13V
30% 15.658A 3.461A 3.505A 1.412A 224.977 90.917% 0 <6.0 48.22°C 0.993
12.065V 5.057V 3.295V 4.958V 247.451 41.41°C 115.11V
40% 21.464A 3.956A 4.009A 1.616A 300.066 91.264% 0 <6.0 48.97°C 0.99
12.060V 5.057V 3.293V 4.952V 328.79 41.86°C 115.08V
50% 26.884A 4.946A 5.015A 1.82A 374.651 91.076% 0 <6.0 51.34°C 0.99
12.057V 5.056V 3.291V 4.945V 411.359 42.01°C 115.06V
60% 32.346A 5.937A 6.023A 2.001A 449.46 90.727% 442 6.4 42.81°C 0.992
12.049V 5.054V 3.288V 4.941V 495.399 56.93°C 115.04V
70% 37.808A 6.929A 7.033A 2.229A 524.514 90.232% 442 6.4 43.12°C 0.993
12.045V 5.053V 3.285V 4.936V 581.296 58.81°C 115.02V
80% 43.337A 7.918A 8.041A 2.333A 599.695 89.583% 442 6.4 43.61°C 0.994
12.040V 5.052V 3.283V 4.931V 669.431 60.95°C 115V
90% 49.202A 8.415A 8.534A 2.436A 674.707 88.924% 723 20.9 44.06°C 0.994
12.036V 5.051V 3.281V 4.926V 758.746 58.82°C 114.97V
100% 54.879A 8.912A 9.06A 3.048A 749.935 88.148% 896 28 45.88°C 0.995
12.031V 5.049V 3.278V 4.923V 850.766 58.33°C 114.95V
110% 60.417A 9.904A 10.165A 3.051A 824.97 87.26% 997 31.1 46.84°C 0.995
12.027V 5.049V 3.275V 4.917V 945.41 59.37°C 114.92V
CL1 0.116A 17.872A 18.122A 0A 151.294 82.967% 442 6.4 41.8°C 0.989
12.081V 5.053V 3.288V 4.952V 182.357 54.66°C 115.12V
CL2 0.115A 19.776A 0A 0A 101.396 82.428% 442 6.4 40.36°C 0.984
12.094V 5.056V 3.302V 4.965V 123.011 51.97°C 115.13V
CL3 0.115A 0A 20.062A 0A 67.389 76.591% 441 6.4 40.96°C 0.973
12.090V 5.067V 3.29V 4.96V 87.988 50.52°C 115.15V
CL4 62.265A 0A 0A 0A 749.699 89.043% 922 28.9 45.15°C 0.995
12.041V 5.056V 3.286V 4.929V 841.956 56.13°C 114.94V

Load regulation is tight on all rails.

Ripple Suppression

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 7.4 mV 5.0 mV 4.0 mV 6.0 mV Pass
20% Load 12.3 mV 5.2 mV 4.2 mV 6.2 mV Pass
30% Load 14.2 mV 5.5 mV 4.6 mV 6.4 mV Pass
40% Load 11.1 mV 5.9 mV 4.9 mV 7.8 mV Pass
50% Load 11.1 mV 5.7 mV 5.5 mV 7.6 mV Pass
60% Load 11.2 mV 6.5 mV 5.9 mV 8.6 mV Pass
70% Load 12.0 mV 6.8 mV 6.5 mV 8.4 mV Pass
80% Load 12.9 mV 6.9 mV 10.4 mV 8.3 mV Pass
90% Load 13.4 mV 7.5 mV 11.4 mV 8.5 mV Pass
100% Load 19.2 mV 8.7 mV 12.2 mV 14.8 mV Pass
110% Load 20.1 mV 8.5 mV 12.8 mV 14.2 mV Pass
Crossload 1 12.0 mV 6.8 mV 14.2 mV 8.3 mV Pass
Crossload 2 7.3 mV 6.5 mV 5.4 mV 8.3 mV Pass
Crossload 3 7.7 mV 5.2 mV 13.6 mV 8.6 mV Pass
Crossload 4 19.8 mV 7.9 mV 7.2 mV 8.7 mV Pass

Ripple suppression is good overall.

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17 thoughts on “Corsair RM750x ATX v3.1 PSU Review

  1. I am quite disappointed with the V12 of this power supply. Processor at 95w, graphics at 110w, and V12 at 11,712. What will happen when I insert a 250w graphics card? My previous 550w superflower never read below 12.

  2. Hi Aris,

    I really enjoy your content, though I rarely buy a PSU and try to keep it that way. I’m assembling a system that will consume 475w at peak CPU and GPU load (though that will only happen during a synthetic benchmark). For headroom and future-proofing, I’m planning to buy a 750w PSU. What would you recommend between an XPG Core Reactor II, Thermaltake GF3, and Corsair RMx? Is the Corsair the best choice for an Nvidia GPU given the included 12v-2×6 cable? I’m given to understand that the 6+2 to 12v-2×6 adapters are, when installed correctly, potentially better than a single 12vhpwr cable. It also seems that the Corsair is most reliable, based on consumer reviews. The XPG and Thermaltake are both 33% cheaper than the Corsair, so you could convince me to save the money but only if you felt the others could be equally reliable.

    1. Hi! I would go for the RM750x (ATX v3.1). In general, the RMx line is one of the best out there. TT, I don’t trust it so much because I cannot know from whom it is made anymore. The XPG is pretty good, but I still prefer the Corsair unit.

  3. Hi Aris,
    I got this PSU after comparing many of the models you reviewed, manly for it’s low noise output and overall good performance. However my unit has extremely loud coil whine. I got it replaced under warranty, but the new one has the same issue. I assume this is happening because the PSU is almost exclusively operating in Burst Mode, since my system is drawing very little power (Zen 5 CPU, no GPU). Installing a GPU might resolve this, but that’s not something I can do right now. What would you suggest to resolve this issue? Get a lower rated Unit? A different model? Thanks for all these great reviews and work over at Cybenetics!

    1. hm coil whine is a huge issue and also has to do with the rest system components. A lower rating PSU might help yes, but still it is mostly a trial-and-error procedure.

      1. Tanks for taking the time to reply! I will give the new RM650e a shot, since it also performed well and has low noise output. It’s a shame since I got a great deal for the RM750x at 99,99€ on Black Friday, but it is what it is.

  4. I just order this, but i cant get the Seasonic out of my head, is it worth another 20 usd over this one? Im very casual gamer and will be going in a 13600+4070 combo hopefully

  5. Hi, on page 8 “protections” it says 1046w for the OPP, but how is that 123% of 750w ? It would be 123% for a 850W unit, but for a 750W unit 1046W is 139.5%. If the OPP is set at 123%, then shouldn’t that be 922.5W ?

  6. Thank you for the detailed review and your time spent for testing the units.
    I just bought this unit on Amazon during BlackFriday deal because of good result in your test.

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