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% | 8.951A | 1.985A | 1.981A | 0.983A | 129.996 | 88.411% | 0 | <6.0 | 45.16°C | 0.976 |
| 12.110V | 5.038V | 3.332V | 5.088V | 147.04 | 40.14°C | 114.86V | ||||
| 20% | 18.926A | 2.977A | 2.97A | 1.182A | 259.954 | 91.227% | 0 | <6.0 | 47.41°C | 0.982 |
| 12.103V | 5.038V | 3.333V | 5.075V | 284.949 | 40.65°C | 114.82V | ||||
| 30% | 29.228A | 3.472A | 3.465A | 1.383A | 389.59 | 91.623% | 369 | <6.0 | 41.09°C | 0.989 |
| 12.096V | 5.04V | 3.334V | 5.062V | 425.181 | 64.96°C | 114.77V | ||||
| 40% | 39.569A | 3.968A | 3.96A | 1.584A | 519.564 | 91.464% | 484 | 7.5 | 41.79°C | 0.992 |
| 12.089V | 5.04V | 3.334V | 5.05V | 568.051 | 67.87°C | 114.73V | ||||
| 50% | 49.592A | 4.96A | 4.949A | 1.787A | 649.732 | 90.955% | 678 | 19.6 | 42.42°C | 0.993 |
| 12.083V | 5.041V | 3.334V | 5.037V | 714.335 | 65.16°C | 114.68V | ||||
| 60% | 59.622A | 5.953A | 5.939A | 1.991A | 779.888 | 89.974% | 1084 | 34.7 | 42.82°C | 0.994 |
| 12.077V | 5.041V | 3.335V | 5.025V | 866.803 | 59.97°C | 114.63V | ||||
| 70% | 69.656A | 6.945A | 6.927A | 2.195A | 909.99 | 88.916% | 1516 | 44.3 | 43.48°C | 0.995 |
| 12.072V | 5.041V | 3.335V | 5.012V | 1023.418 | 58.86°C | 114.58V | ||||
| 80% | 79.694A | 7.933A | 7.914A | 2.3A | 1039.561 | 88.218% | 1691 | 46.5 | 43.98°C | 0.995 |
| 12.067V | 5.041V | 3.336V | 5V | 1178.424 | 60.21°C | 114.52V | ||||
| 90% | 90.137A | 8.427A | 8.391A | 2.405A | 1169.762 | 87.421% | 1826 | 47.9 | 44.28°C | 0.995 |
| 12.062V | 5.043V | 3.337V | 4.989V | 1338.061 | 62.12°C | 114.47V | ||||
| 100% | 100.333A | 8.922A | 8.9A | 3.02A | 1299.402 | 86.508% | 2004 | 50.9 | 45.85°C | 0.995 |
| 12.057V | 5.043V | 3.337V | 4.968V | 1502.086 | 64.58°C | 114.41V | ||||
| 110% | 110.462A | 9.91A | 9.978A | 3.026A | 1429.608 | 85.422% | 2004 | 50.9 | 46.45°C | 0.995 |
| 12.052V | 5.044V | 3.337V | 4.957V | 1673.59 | 69.16°C | 114.35V | ||||
| CL1 | 0.116A | 11.941A | 11.897A | 0A | 101.3 | 81.851% | 663 | 19.1 | 41.68°C | 0.981 |
| 12.118V | 5.04V | 3.337V | 5.1V | 123.782 | 50.42°C | 114.85V | ||||
| CL2 | 0.115A | 19.821A | 0A | 0A | 101.354 | 81.334% | 459 | <6.0 | 40.79°C | 0.981 |
| 12.118V | 5.043V | 3.331V | 5.1V | 124.629 | 51.93°C | 114.86V | ||||
| CL3 | 0.114A | 0A | 19.724A | 0A | 67.398 | 75.565% | 633 | 17.5 | 41°C | 0.948 |
| 12.118V | 5.039V | 3.347V | 5.103V | 89.188 | 48.82°C | 114.88V | ||||
| CL4 | 107.869A | 0A | 0A | 0.001A | 1299.952 | 87.246% | 1869 | 48.6 | 45.52°C | 0.995 |
| 12.051V | 5.041V | 3.334V | 5.031V | 1489.978 | 64.64°C | 114.42V |
Load regulation is tight on the major rails.
Ripple Suppression
| Test | 12V | 5V | 3.3V | 5VSB | Pass/Fail |
| 10% Load | 16.3 mV | 14.6 mV | 14.2 mV | 13.6 mV | Pass |
| 20% Load | 14.9 mV | 14.6 mV | 13.6 mV | 13.7 mV | Pass |
| 30% Load | 16.6 mV | 16.0 mV | 14.7 mV | 13.9 mV | Pass |
| 40% Load | 18.1 mV | 17.2 mV | 16.4 mV | 15.4 mV | Pass |
| 50% Load | 18.0 mV | 16.6 mV | 15.9 mV | 14.6 mV | Pass |
| 60% Load | 19.1 mV | 18.2 mV | 17.6 mV | 15.0 mV | Pass |
| 70% Load | 20.4 mV | 18.7 mV | 18.4 mV | 16.4 mV | Pass |
| 80% Load | 21.2 mV | 19.6 mV | 18.9 mV | 19.6 mV | Pass |
| 90% Load | 21.3 mV | 19.3 mV | 19.0 mV | 21.7 mV | Pass |
| 100% Load | 27.0 mV | 22.0 mV | 21.1 mV | 23.9 mV | Pass |
| 110% Load | 28.6 mV | 22.5 mV | 21.9 mV | 28.0 mV | Pass |
| Crossload 1 | 42.1 mV | 17.6 mV | 16.4 mV | 24.2 mV | Pass |
| Crossload 2 | 43.5 mV | 18.8 mV | 15.1 mV | 22.3 mV | Pass |
| Crossload 3 | 41.8 mV | 16.4 mV | 16.6 mV | 21.4 mV | Pass |
| Crossload 4 | 25.5 mV | 20.2 mV | 20.3 mV | 26.9 mV | Pass |
Ripple suppression is good enough. That said, I am used to seeing lower ripple from SF units on the minor rails.
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You can blame dell apfc psu from 2012. But in reality they were made good psu. Problem is just newly concept idea used that not still fully finished 2025. APFC psu prone to failure due to incomplete technology cooling or efficiency eventualy they lived short than passive psu. Because of that they runs on lower loads called hybrid or passive until 60% loads. When it hits 80% kicks in active power factor correction activated even cooling might not help if it runs 100% loads. However apfc is becoming trend is might be good at sound but passive is budget option. Avoid glitches or issues just put good ups that will be enough handling most problems and your computer will be longer to live
I have two brand new Leadex III PSUs that are failing the Power Good test on a Thermaltake Dr. Power III. The tester is passing all of my other PSUs (Leadex VII XG, Seasonic Focus, Corsair RMx Shift). Is this just really bad luck, or is there some kind of compatibility issue with the tester?
don’t trust so much these inexpensive tools. Don’t get me wrong, they are great for fast readings and to get an idea if something is way wrong, but for things like timings etc. they are so so.
I just installed the 850W version and the fan behavior is a bit confusing to me. In all three modes, the fan is equally loud — it feels like it’s running at around 1500 to 1800 RPM, at least based on the noise level and airflow. In continuous mode, it’s just as loud as in the other modes, the only difference being the temperature trigger points. Even when I set it to the highest trigger threshold, the fan still kicks in every few minutes — and I’m not even drawing 400W. Is this normal?
I’m having the exact same problem with mine. Sent it to warranty but it checked out ok, now stuck with this loud fan. Does yours also smell like a factory, did it clear out? Mine is rancid after even after 1 week.
What differences Leadex III and Leadex VII series have?
different platform
Do you think the 1000w version of this PSU is good? There’s no reviews on it
Should I buy Super Flower Leadex III 1300W ATX v3.1 or Cooler Master MWE gold v2 1250w to be on safe site about 2vsb rail?
SF told me that they will fix the 5VSB OCP.
thank you for replying! what about NZXT c1000 atx3.1 or Corsair RM1000e? NZXT c1000 atx3.1 is just few dollars more at my country
I got this PSU but I think mine is dead. Tried doing a BIOS flashback with just the motherboard and cpu power plugged in and nothing happened (yes the psu was switched on). I then did the paperclip test and the fan didnt spin but im not sure if it normally spins at startup. Does anyone know? I tried both with ECO on and ECO off.
with ECO off the PSU’s fan should start.
Thanks for your review. Any thoughts on what you’d pick between the 1000W version of this and the new (ATX 3.1) RM1000x that you reviewed in September?
I am also looking at the Leadex VII XP Platinum that you recommend in your guide. But I think this review is the first time anyone has looked at one of the new ATX 3.1 Leadex III models.
The difference in Wattage us huge between these two, 300W. If you need more power, the Leadex III.
Aris do you have any info for Asrock PSU ?
Yes. FSP and HEC OEMs.