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% | 11.460A | 1.982A | 1.989A | 0.975A | 159.982 | 91.544% | 0 | <6.0 | 44.54C | 0.975 |
| 12.076V | 5.044V | 3.317V | 5.125V | 174.766 | 40.29C | 114.82V | ||||
| 20% | 23.943A | 2.975A | 2.987A | 1.169A | 319.941 | 93.477% | 0 | <6.0 | 45.29C | 0.983 |
| 12.072V | 5.041V | 3.315V | 5.133V | 342.263 | 40.75C | 114.77V | ||||
| 30% | 36.720A | 3.473A | 3.486A | 1.362A | 479.147 | 93.639% | 0 | <6.0 | 46.43C | 0.983 |
| 12.067V | 5.039V | 3.313V | 5.138V | 511.696 | 41.49C | 114.71V | ||||
| 40% | 49.607A | 3.971A | 3.986A | 1.556A | 639.567 | 93.421% | 0 | <6.0 | 47.39C | 0.987 |
| 12.062V | 5.037V | 3.311V | 5.141V | 684.616 | 41.78C | 114.66V | ||||
| 50% | 62.108A | 4.965A | 4.987A | 1.751A | 799.314 | 92.834% | 472 | 9.0 | 42.32C | 0.992 |
| 12.056V | 5.035V | 3.309V | 5.14V | 861.012 | 48.33C | 114.59V | ||||
| 60% | 74.686A | 5.962A | 5.988A | 1.946A | 959.821 | 92.215% | 474 | 9.1 | 42.94C | 0.994 |
| 12.051V | 5.032V | 3.307V | 5.139V | 1040.861 | 49.51C | 114.54V | ||||
| 70% | 87.208A | 6.96A | 6.992A | 2.14A | 1119.545 | 91.548% | 607 | 16.1 | 43.36C | 0.994 |
| 12.045V | 5.03V | 3.304V | 5.139V | 1222.904 | 50.41C | 114.47V | ||||
| 80% | 99.813A | 7.958A | 7.995A | 2.239A | 1279.59 | 90.829% | 858 | 27.5 | 43.63C | 0.995 |
| 12.039V | 5.027V | 3.302V | 5.135V | 1408.78 | 51.66C | 114.4V | ||||
| 90% | 112.760A | 8.456A | 8.484A | 2.339A | 1439.404 | 90.062% | 1093 | 34.7 | 44.99C | 0.995 |
| 12.033V | 5.025V | 3.3V | 5.131V | 1598.242 | 54.01C | 114.33V | ||||
| 100% | 125.524A | 8.957A | 9.005A | 2.916A | 1599.427 | 89.202% | 1385 | 41.5 | 45.53C | 0.996 |
| 12.027V | 5.023V | 3.299V | 5.143V | 1793.038 | 55.61C | 114.26V | ||||
| 110% | 138.235A | 9.958A | 10.103A | 2.922A | 1760.043 | 88.283% | 1894 | 50.1 | 46.55C | 0.996 |
| 12.021V | 5.021V | 3.296V | 5.134V | 1993.628 | 57.45C | 114.18V | ||||
| CL1 | 0.117A | 14.993A | 15.043A | 0A | 126.316 | 86.836% | 476 | 9.1 | 41.72C | 0.968 |
| 12.064V | 5.022V | 3.298V | 5.093V | 145.459 | 47.25C | 114.81V | ||||
| CL2 | 0.116A | 24.862A | 0A | 0A | 126.249 | 85.363% | 474 | 9.1 | 40.34C | 0.969 |
| 12.065V | 5.022V | 3.309V | 5.094V | 147.895 | 47.35C | 114.82V | ||||
| CL3 | 0.115A | 0A | 25.035A | 0A | 83.904 | 80.078% | 473 | 9.0 | 41.33C | 0.961 |
| 12.067V | 5.029V | 3.296V | 5.093V | 104.776 | 50.35C | 114.83V | ||||
| CL4 | 133.031A | 0A | 0A | 0A | 1599.979 | 89.613% | 1290 | 40.0 | 45.97C | 0.996 |
| 12.027V | 5.04V | 3.315V | 5.023V | 1785.434 | 56.92C | 114.28V |
Load regulation is notably better than the TX-1600, especially at 3.3V. This must be due to sample variance.
Ripple Suppression
| Test | 12V | 5V | 3.3V | 5VSB | Pass/Fail |
| 10% Load | 10.6 mV | 13.6 mV | 10.6 mV | 13.5 mV | Pass |
| 20% Load | 11.5 mV | 12.8 mV | 10.8 mV | 29.7 mV | Pass |
| 30% Load | 10.9 mV | 13.3 mV | 11.0 mV | 22.4 mV | Pass |
| 40% Load | 11.2 mV | 13.6 mV | 10.5 mV | 21.1 mV | Pass |
| 50% Load | 11.5 mV | 13.2 mV | 11.0 mV | 16.9 mV | Pass |
| 60% Load | 12.0 mV | 13.9 mV | 12.0 mV | 22.7 mV | Pass |
| 70% Load | 12.8 mV | 14.5 mV | 11.8 mV | 25.3 mV | Pass |
| 80% Load | 12.8 mV | 14.4 mV | 13.1 mV | 25.6 mV | Pass |
| 90% Load | 12.5 mV | 15.6 mV | 13.0 mV | 26.0 mV | Pass |
| 100% Load | 19.5 mV | 15.8 mV | 13.4 mV | 27.3 mV | Pass |
| 110% Load | 21.0 mV | 16.8 mV | 13.9 mV | 28.5 mV | Pass |
| Crossload 1 | 14.9 mV | 15.2 mV | 14.6 mV | 10.8 mV | Pass |
| Crossload 2 | 11.6 mV | 23.0 mV | 12.9 mV | 10.5 mV | Pass |
| Crossload 3 | 9.9 mV | 13.7 mV | 21.3 mV | 10.6 mV | Pass |
| Crossload 4 | 19.7 mV | 14.9 mV | 10.7 mV | 13.6 mV | Pass |
Ripple suppression is good on all rails and a bit higher than expected at 5VSB without creating any issues though.
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Based on your suggestions bought the PX-1600. Amazing quality and cables are braided. Saved around 130 USD compared to the TX version.
I am using on a 220v socket so efficiency must be even better.
Ok, thanks for replying crmaris. I’ve had good experience with Seasonic so far & their Prime range so I’ll stick with them, thanks again for your time & in-depth reviews.
Hi crmaris, thanks for your reviews on the TX & this PX, awesome job.
Are these cons significant enough to deter someone like yourself from buying one?
Have you tested/reviewed a better high end alternative or more simply, which PSU in the 1300W+ category would be your go to right now?
Hi! So far there isn’t any better choice in the ATX v3.0 and >1500W capacity. I haven’t tested something better. The Corsair AX1600i has higher overall performance but it isn’t ATX v3.0 compatible
Very extensive review. I have the old Prime PX-1300 that has the 12v sense defect. I disconnected the wire and the PSU hasn’t turned off abnormally since when overclocking my 7900 XTX. My next PSU will definitely be ATX 3.0-compatible but I don’t think I need a new one, especially considering the limited choices now. I hope Corsair will update the AX1600i soon but I bet it will cost an arm and a leg.