Corsair HX1200i ATX v3.1 (2025) 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% 8.152A 1.974A 1.971A 0.989A 119.997 88.875% 0 <6.0 48.05°C 0.985
12.070V 5.066V 3.349V 5.055V 135.073 40.03°C 114.82V
20% 17.326A 2.962A 2.958A 1.188A 239.957 91.886% 0 <6.0 50.48°C 0.992
12.066V 5.063V 3.347V 5.05V 261.117 40.73°C 114.76V
30% 26.786A 3.457A 3.452A 1.388A 359.164 92.381% 0 <6.0 52.26°C 0.994
12.063V 5.062V 3.346V 5.045V 388.71 41.23°C 114.72V
40% 36.347A 3.952A 3.947A 1.588A 479.531 92.36% 0 <6.0 54.34°C 0.998
12.059V 5.06V 3.345V 5.039V 519.2 41.81°C 114.69V
50% 45.526A 4.943A 4.936A 1.788A 599.318 92.168% 0 <6.0 58.15°C 0.998
12.055V 5.058V 3.343V 5.035V 650.241 42.22°C 114.64V
60% 54.767A 5.934A 5.926A 1.988A 719.837 91.68% 395 <6.0 42.68°C 0.999
12.051V 5.056V 3.341V 5.03V 785.207 57.49°C 114.6V
70% 63.949A 6.926A 6.919A 2.189A 839.551 90.77% 610 13.1 43.23°C 0.999
12.048V 5.054V 3.339V 5.025V 924.919 56.36°C 114.56V
80% 73.220A 7.918A 7.912A 2.29A 959.531 90.066% 837 24.6 43.96°C 0.998
12.042V 5.051V 3.336V 5.022V 1065.37 56.36°C 114.51V
90% 82.825A 8.416A 8.396A 2.392A 1079.352 89.419% 1065 31.9 44.04°C 0.998
12.036V 5.049V 3.335V 5.017V 1207.094 56.26°C 114.48V
100% 92.242A 8.915A 8.911A 2.998A 1199.302 88.731% 1226 36.3 45.69°C 0.998
12.029V 5.047V 3.333V 5.005V 1351.659 56.23°C 114.42V
110% 101.589A 9.911A 9.997A 2.999A 1319.977 87.879% 1580 42.7 46.84°C 0.998
12.025V 5.045V 3.331V 5.002V 1502.132 57.74°C 114.36V
CL1 0.115A 17.895A 17.867A 0A 151.27 84.126% 394 <6.0 43.51°C 0.988
12.065V 5.046V 3.336V 5.106V 179.812 51.37°C 114.79V
CL2 0.115A 24.759A 0A 0A 126.233 82.589% 780 21.9 42.78°C 0.989
12.067V 5.043V 3.341V 5.117V 152.841 48.65°C 114.81V
CL3 0.115A 0A 24.705A 0A 83.881 76.682% 761 20.8 41.91°C 0.978
12.065V 5.061V 3.339V 5.071V 109.388 47.13°C 114.82V
CL4 99.714A 0A 0A 0A 1199.922 89.162% 1225 36.3 44.58°C 0.998
12.033V 5.057V 3.341V 5.032V 1345.763 53.29°C 114.44V

Load regulation is tight on all rails.

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
20W 1.230A 0.494A 0.493A 0.197A 20 69.436% 0 <6.0 39.04°C 0.799
12.064V 5.065V 3.347V 5.065V 28.809 36.02°C 114.83V
40W 2.708A 0.691A 0.69A 0.296A 40.001 74.712% 0 <6.0 42.16°C 0.879
12.068V 5.066V 3.348V 5.064V 53.543 37.75°C 114.82V
60W 4.186A 0.888A 0.887A 0.395A 60.002 79.516% 0 <6.0 44.61°C 0.964
12.070V 5.067V 3.349V 5.063V 75.457 38.52°C 114.82V
80W 5.660A 1.085A 1.084A 0.494A 79.946 85.147% 0 <6.0 46.14°C 0.977
12.071V 5.067V 3.35V 5.062V 93.9 39.55°C 114.81V

A look at the light loads table is always useful, because the PSU will usually operate at light loads.

Ripple Suppression

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 16.2 mV 12.9 mV 12.7 mV 8.0 mV Pass
20% Load 22.9 mV 19.7 mV 18.5 mV 11.2 mV Pass
30% Load 19.9 mV 16.8 mV 16.6 mV 10.6 mV Pass
40% Load 19.4 mV 17.0 mV 16.1 mV 10.5 mV Pass
50% Load 21.2 mV 16.7 mV 16.0 mV 10.1 mV Pass
60% Load 19.6 mV 16.3 mV 16.0 mV 10.0 mV Pass
70% Load 19.8 mV 16.1 mV 15.6 mV 10.8 mV Pass
80% Load 25.9 mV 18.1 mV 18.5 mV 10.9 mV Pass
90% Load 22.3 mV 18.1 mV 17.8 mV 11.2 mV Pass
100% Load 30.6 mV 17.4 mV 18.3 mV 11.5 mV Pass
110% Load 29.2 mV 17.6 mV 19.3 mV 11.5 mV Pass
Crossload 1 21.9 mV 19.6 mV 19.7 mV 10.7 mV Pass
Crossload 2 21.1 mV 22.5 mV 16.5 mV 10.2 mV Pass
Crossload 3 19.9 mV 16.1 mV 20.0 mV 10.6 mV Pass
Crossload 4 28.5 mV 15.8 mV 16.3 mV 10.4 mV Pass

Ripple suppression is good.

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11 thoughts on “Corsair HX1200i ATX v3.1 (2025) PSU Review

  1. Hi,

    Thanks for the in-depth review

    For the Super Flower Leadex VII XP 1200W ATX v3.0 PSU Review, you categorized its ripple suppression as “exceptional at 12V and good enough on the other rails.”

    Yet for this review, you mearly said “Ripple suppression is good”, though by the charts, it seems that ripple suppression on this PSU is better than the Super Flower.

    Is the ripple suppression on this PSU better than the Super Flower or is there something that makes the Super Flower stand above the Corsair?

    Thanks!

    1. I didn’t quite understand your question. In any case, ripple suppression in the SF unit is very good, mainly because of the 12V rail’s performance, which matters the most.

  2. “I want to start with this first. From now on, I won’t often do Corsair reviews since I don’t communicate with Corsair’s PR team.”
    Can I ask what’s the story here? I wasn’t sure if there was any bad blood between you and Corsair. I can say it will be sad to see fewer corsair PSU reviews, because they’re a big player in the PSU space, and your reviews are always so thorough.

  3. Bonjour,

    Franchement vous faites un formidable travail en profondeur dans de nombreux domaines informatique que vous maitrisez et que vous ne faites partager pour ne pas commettre d’erreur dans nos choix. Voilà j’ai opté pour une 5090 Astral OC pour mon nouvel ordinateur. Mais voilà ayant vu sur le salon Computex l’arrivé en début d’année prochaine, de la gamme Optiguard de Seasonic. Je souhaiterais avoir une alimentation de qualité mais sans me ruiner non plus car je compte bien m’acheter ce modèle Optiguard bien sûr quand il sera passer entre vos mains, pour voir si le jeu en vaut la chandelle. Donc j’avais jeter mon dévolu sur la Prime 1600W et Cybenetics m’a indiqué que même si elle n’est pas en ATX 3.1 le câble qui relie l’alimentation à la carte graphique fera le job. Qu’en est il dans les faits ? Dois je demander à Seasonic un nouveau câble ou bien utiliser celui qui sera j’imagine fourni avec l’Asus Astral OC 5090 ? Enfin, je me suis dit en moi même mais si j’opte pour une alimentation ATX 3.0 autant partir sur une AX1600i dans ce cas. Mais voilà je suis perdu, totale. Car si une alimentation moins cher et tout aussi véloce et performante avec une protection de ventillateur et qui ne fait pas griller ma carte graphique existe chez un autre constructeur je suis ouvert à cette proposition. Merci d’avance pour votre aide précieuse.

    1. Hello, Frankly you do a wonderful job in depth in many areas of computing that you master and that you do not share to make mistakes in our choices. I opted for a 5090 Astral OC for my new computer. But then I saw at Computex that Seasonic’s Optiguard range would be arriving early next year. I’d like to have a quality power supply, but I don’t want to break the bank either, as I intend to buy this Optiguard model once it’s in your hands, to see if it’s worth the money. So I’d set my sights on the Prime 1600W, and Cybenetics told me that even if it’s not ATX 3.1, the cable linking the power supply to the graphics card will do the job. What’s the reality? Should I ask Seasonic for a new cable, or use the one I imagine will be supplied with the Asus Astral OC 5090? Well, I said to myself, if I opt for an ATX 3.0 power supply, I might as well go for an AX1600i. But now I’m totally lost. Because if a less expensive power supply with the same speed and performance, with fan protection that doesn’t fry my graphics card, exists from another manufacturer, I’m open to this proposal. Thank you in advance for your help.

  4. Hi, thanks for your high quality reviews and your hard work! Just bought an Astral RTX 5090 OC and want to pair it with a high quality PSU. Had in the past mostly high quality ATX 2.0 Seasonic like the TX-1000, do you recommend the newer ones due to be released – like the TX-1300, or you have different recommendations for a silent, reliable PSU that can handle the GPU load?

  5. Thank you very much for all the reviews, analyses and hard work.
    I am in the market for a high-end PSU, and ended up eyeing this Corsair HX1200i (or HX1500i) and the cooler master X silent max 1300. Which one would you consider the most reliable?

    1. Reliability also has to do with luck and the mains grid quality, since all PSUs you mention have high build quality and good parts. I would probably go for the HX1500i, because the CM unit is super expensive.

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