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Power Supplies

XFX PRO 1250W Black Edition Modular Power Supply 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.

xfx_pro_1250W_voltage_regulation

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.

80_plus_specs

 

xfx_pro_1250W_efficiency

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).

xfx_pro_1250W_PFC

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4 Comments

  1. I don’t think the fan profile is terribly important. If you have a muscle bound system that can come close to occasionally demanding the kind of power this unit can supply then the chances are you’d rather settle on 1400w+ PSU.
    I’m surprised XFX didn’t opt for a San Ace fan which is something Seasonic does and is touted to be one of the best if not the best in the the consumer PSU game. Can it really make much difference the in price?

  2. I don’t think the fan profile is terribly important. If you have a muscle bound system that can come close to occasionally demanding the kind of power this unit can supply then the chances are you’d rather settle on 1400w+ PSU.
    I’m surprised XFX didn’t opt for a San Ace fan which is something Seasonic does and is touted to be one of the best if not the best in the the consumer PSU game. Can it really make much difference the in price?

  3. I don’t think the fan profile is terribly important. If you have a muscle bound system that can come close to occasionally demanding the kind of power this unit can supply then the chances are you’d rather settle on 1400w+ PSU.
    I’m surprised XFX didn’t opt for a San Ace fan which is something Seasonic does and is touted to be one of the best if not the best in the the consumer PSU game. Can it really make much difference the in price?

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