TheLatinHeat

Can someone explain what is PFC: Active and PFC: Passive?And how that is important?

chubbyfatazn

From Wikipedia:

"Active PFC

An Active Power Factor Corrector (active PFC) is a power electronic system that controls the amount of power drawn by a load in order to obtain a Power factor as close as possible to unity. In most applications, the active PFC controls the input current of the load so that the current waveform is proportional to the mains voltage waveform (a sinewave).

Passive PFC

This is a simple way of correcting the non linearity of a power draw. It is not as effective as an active PFC."

http://en.wikipedia.org/wiki/Power_factor_correction

DuckieHo

Power Factor Correction helps use the most out of the AC power being delivered to your PSU. It helps to reduce the energy required to transmit electricity. Active PFC has additional circuitry that keeps the rate above 95%. Passive PFC is simpler design and hence much cheaper.

To you the home user, PFC does nothing for you. Only in high-power multiple PC situations would this matter. Power companies would then charge you at a higher different rate.

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TheLatinHeat

Wow! Nice! Thanks guys for this information. I learn something new today, I guess even when you are in the field of computer there is always something new to learn.

gonX

Though, please note that it is required in the Europe. We usually have swinging outputs from 215V on one part of the day and later 239V.

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