-=PCTechTalk=- Re: Power Supply

The number of rails refers to how the +12v supply is broken up.  A single 
rail design will have all of the +12's on the same circuitry, but a 4 rail 
design will split up the +12's maximum allowed amps across 4 different 
circuits.  From your description, it looks like it has 2 rails (The second 
section has two +12v outputs rated at 25 amps each and 552 watts) splitting 
50Amps across the two evenly.

When you go to connect everything, you'll want to divide your +12v devices 
between the two leads coming out of the PS.  So, if you have two hard 
drives, the mobo's +12 and maybe a floppy drive, you can put the floppy and 
mobo on one lead and the two hard drives on the other.  If you also have two 
optical drives, put one of them on the first lead and the other on the 
second to help distribute the power more evenly.

On the other hand, if you have any one device that requires more power than 
most, it may force you to include less additional items on that lead.  Look 
carefully at the requirements of all of the devices that require +12v power 
and work to balance them as well as possible between the two leads.

The +5vSB supply is one that is always on, even when the PS is in standby 
mode.  It's used to power 'wake on ...' devices that allow the system to be 
booted from across a network.  This supply is delivered to the system as a 
part of the mobo connector, so it's not something you have to try and 
identify when you're installing the PS.

Peace,
Gman

http://www.thevenusproject.com/index.php

"The only dumb questions are the ones we fail to ask"

----- Original Message ----- 
From: "dsw32952" <dsw32952@xxxxxxxxx>
To: <pctechtalk@xxxxxxxxxxxxx>
Sent: Tuesday, May 26, 2009 8:44 AM
Subject: -=PCTechTalk=- Re: Power Supply


>I think this has 4.  The DC output chart is divided into 4 sections.
> One with +5v and +3.3v, both rated at 25 amps and 150 watts.  The second
> section has two +12v outputs rated at 25 amps each and 552 watts.  The
> third one -12v at .3 amp amd 3.6watts and the last one is +5vSB at 2.5
> amps and 12.5 watts.  What does the SB signify? 

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