Corsair RM1000x 1000 Watt 80 PLUS Gold Review

Efficiency, PFC and Voltage Regulation

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.

Really tight regulation here, with all the major voltages being less than 1% away from spec, and in most cases, even closer than that. The -12v rail is a little hot, but is really no cause for concern, these are very good voltages overall and should provide you with a very stable system.

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.

The RM1000x falls perfectly into the 80 Plus Gold efficiency rating, giving good results across the full load range.

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).

The PFC performance on this unit is exceptionally good, some of the best results we’ve ever seen and once again improving on the fantastic performance of previous high-end Corsair PSUs.