Author Topic: Dual 12volt rails?  (Read 3702 times)

Offline LobbDogg

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Dual 12volt rails?
« on: May 31, 2006, 03:12:37 PM »
I think I was sleeping or something when power supplies started coming with dual 12volt rails. How do I identify a power supply that has that feature? or is it just something that the manufacturer will state on the specs?

Also what are the advanatages of having this?
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Offline Zeus

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Re: Dual 12volt rails?
« Reply #1 on: June 01, 2006, 05:53:05 AM »
Often on newer PSU's they list the 12v specs on each rail.  You should see something like 12v1 - 33A, 12v2 - 28A.  The advantages of having dual 12v rails include the ability to run your video cards (think SLI) off of a different rail.  SLI cards take a fair bit of power and when you fire up games, the voltage on the rail may drop slightly.  If the rest of your system is on a different rail, it should remain stable.