How do dual 12v Rails on PSU work?

[TheRyuu]

I have a Seasonic S12-600W (overkill probably) and it has dual 12v Rails with 16A on each rail. How do dual 12v rails work?
They put both 6pin PCIe connectors on the same cable if that matters at all.

Just curious I guess, thanks.

 

[Bobthelost]

With some/most of them there's no real difference, they use the same regulator to supply both rails. The point of the dual rail system was to limit the current running through the wires.

 

[GalvanizedYankee]

Got some homework for you OP.

http://www.formfactors.org/ fifth link down, the 40+page pdf will answer questions you haven't thought of yet. It's a good resource.

http://www.silentpcreview.com/article265-page1.html Read this in total.

Do not resist homework, as there will be a quiz on this later


...Galvanized

 

[TheRyuu]

Originally posted by: GalvanizedYankee
Got some homework for you OP.

http://www.formfactors.org/ fifth link down, the 40+page pdf will answer questions you haven't thought of yet. It's a good resource.

http://www.silentpcreview.com/article265-page1.html Read this in total.

Do not resist homework, as there will be a quiz on this later


...Galvanized

So were's my quiz?

 

[JimPhelpsMI]

Hi, The term RAIL is a holdover from the old days when the voltage RAILs were a heavy copper bar running across each level of the electronics case to power dozens of plugin PC boards. Dual rails should be from different voltages sources. I suppect that they are using two outputs from the same transformer in the PCs Switching Power supply with separate converters and regulators. Maybe? Good Luck, Jim