Efficiency, PFC and Voltage Regulation – Leadex Platinum 750W
Voltage Regulation
To test voltage regulation we load the power supply to five different load scenarios that give an equal spread of load across every single rail. So that means 20% on all rails, 40% on all rails and so on. We then calculate the average deviance of each rail from its expected voltage.
Due to the limitations of our load tester, we had to split the 12v rail across multiple “simulated” rails. The results here are pretty incredible, with very little deviance from the rated specifications, 12V1 was around 1% off, as was the -12V and 12V2, but these are still very tight and consistent figures overall.
Power Efficiency
Power efficiency is measured by calculating actual supplied wattage divided by the wattage drawn at the wall/plug, multiplied by 100 to give a percentage. We then compare that to the particular 80 Plus certification the company claims to see if it meets that. You can see the 80 Plus certifications below, we always test 230v power supplies.
Power Efficiency is very good overall, but in our tests, it fell just a little short of the Platinum rating, yet exceeding that of the Gold rating, for the most part.
Power Factor Correction
Power Factor Correction is the ratio of the real power flowing to the load, to the apparent power in the circuit. The aim of PFC is to make the load circuitry that is power factor corrected appear purely resistive (apparent power equal to real power). In this case, the voltage and current are in phase and the reactive power consumption is zero. The closer the number to one the better as this allows the most efficient delivery of electrical power (Source – Wikipedia).
PFC was very good overall, especially from 60% load and above.
