PFC couldn't be more irrelevant when it comes to output capacity. PFC simply
attempts to get the current and voltage cycles more in phase coming from
mains. This has absolutely nothing to do with the DC power coming OUT of the
PSU. PFC simply makes the PSU look closer to a pure resistive load to the
power company. This is only important for commercial installations where
there is a power factor surcharge. PFC doesn't do anything for a residential
consumer on a residential meter.
Efficiency, on the other hand, is an entirely different argument. Don't make
the mistake of thinking PFC and efficiency are directly related. In fact,
efficiency is REDUCED by having Active PFC, simply because there is another
circuit sucking down power.
In short: PFC does absolutely nothing to power output of the PSU, and
absolutely nothing to reduce your power bill if you are in a residence.
Read here: http://www.dansdata.com/gz028.htm
Greg
----- Original Message -----
From: "Stan Zaske" <[EMAIL PROTECTED]>
To: "The Hardware List" <[email protected]>
Sent: Wednesday, May 03, 2006 12:58 PM
Subject: Re: [H] Question re changing out PS
The important thing to remember is, it's not the total wattage that
matters with modern PC's but the amount of amperage on the 12v rail and
IMHO whether the PFC is active.
Veech wrote:
I'm looking to upgrade my ATI AIW 9800Pro 128MB video card to a Geforce
7800GS CO 256MB card. I currently have a 431W PS, and will probably buy
a 600W PS as well, due to the increased power demands of the new card. I
*assume* swapping out the PS will be a matter of simply unplugging
connections from the old PS, removing it, installing the new PS and
plugging back in, is this correct?
Anyone wanna make an offer on the Radeon All-In-Wonder 9800Pro?
Veech
