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Adaptive PFC

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Joined
Feb 1, 2008
Messages
2,276
I was unfamiliar with PFC (Power Factor Correction) and was looking at UPS units on Newegg when one of the reviews got my attention. It was a UPS I already owned and the guy that reviewed it complained that PFC was not supported with the particular unit and he returned it for one that did.

I have an Antec SG-850 and according the the specs currently listed it is a PFC PSU. Now I am wondering if I have been damaging my PSU and possibly my entire PC by using this UPS. As much as I hate to buy a new UPS that is $200+ when I already own one that I paid almost that much for I will if it needs to be done.

I am hoping someone more knowledgeable than myself can give me an idea of how much of an issue this is and if I need to be ordering a new PSU ASAP. Thanks.
 
Active PFC, not adaptive. The SG-850 does indeed have APFC. Compatibility with UPSes generally depends on the specific PSU, not the UPS, so a UPS that doesn't work with a certain APFC PSU may still work with others. Keep in mind as well that issues only occur when the UPS runs in battery mode. A UPS that has an active power source from the wall will not cause any issues since the power is simply being passed through to the PSU, but when it is running on battery power, the UPS produces its own power for the attached devices.

What it comes down to in the end is that if the UPS is already working with your PC, you have nothing to worry about. UPSes won't cause damage to PSUs with APFC or vice versa. The only thing that might happen is that the PSU or UPS will produce an annoying noise, or the UPS will just shut down when you try to run the PSU off of it in battery mode. If neither of those things is happening to you, everything is fine.
 
I have been researching it more and it looks like it might be some marketing hype on the part of Cyberpower. I think I'll not worry about it too much for now.
 
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