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Single VS multi 12v rails

By red1776
Aug 15, 2010
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  1. This question has been bandied about here on TS for years. here is a supposedly definitive answer. keep in mid it was authored by Antec, but it is the concept I have been operating under. would like to hear some feedback by othet electrically inclined here.

    http://www.tomshardware.com/us/press/OCP-Power-Safety-26
     
  2. hellokitty[hk]

    hellokitty[hk] Hello, nice to meet you! Posts: 3,435   +145

    Yeah sure I guess.
    No technical reason why though :).
     
  3. dividebyzero

    dividebyzero trainee n00b Posts: 4,891   +1,258

    Sorry, red...I got one sentence in before I had to post...
    Silverstone Olimpia -one of the oldest single-12v rail PSU series around
    Silverstone Decathlon -likewise
    The venerable Corsair HX1000...
    I skipped the rest of the article. If it's all up to that standard it might be worth a laugh.
     
  4. red1776

    red1776 Omnipotent Ruler of the Universe Topic Starter Posts: 5,219   +157

    Not at all Chef, that's why I posted it. I read the whole article (illustrations and all) like a dog seeing a ceiling fan for the first time. i thought, gee, there are a whole ****load of quality PSU makers with "about to explode' PSU's out there. I was genuinely surprised no-one at Tom's took exception, or even responded to it.
     
  5. LinkedKube

    LinkedKube TechSpot Project Baby Posts: 3,481   +44

    It was an entertaining article at least. I just looked up the specs of my psu earlier today after responding to a thread about a psu. 1080 watts max supplies just on my 12v rails. This a marketing ploy for antec or something?
     
  6. Rage_3K_Moiz

    Rage_3K_Moiz Sith Lord Posts: 5,431   +28

    Some single rail PSUs do have OCP but they don't necessarily kick in when short-circuit happens because of a very high trip-point (say, a 70A TP on a 52A rail), and the same applies to multi-rail PSUs with a TP as high as 30A per rail.

    Bottom-line: OCP is a good thing to have, but for most people it's a moot point. Also, where it should be set is something most engineers really don't have an answer to with variables like the resistance of the short, melting point of the insulation used on the wiring, the length and gauge of the wiring used etc.

    This article is marketing spin, and shouldn't be taken at face value.
     
  7. captaincranky

    captaincranky TechSpot Addict Posts: 11,700   +1,886

    Momma.....I'm a skeerd....really, reeally skeerd

    This really shocked me, (if you'll pardon the really bad, and opportunistic pun).

    Once I read this I firmly vowed never to hook up a power supply to my genitals again, especially if my feet were soaking in a bucket of water. I'll just stick with the old "safe" method of a 12 volt car battery and a pair of jumper cables.
     
  8. Leeky

    Leeky TS Evangelist Posts: 3,797   +116

    The old tried and tested method; handy as there is always a farmers jeep/tractor in the countryside. :D

    I don't see what they're getting at, at all. as it makes no odds in most situations. Even with OCP on a multi rail setup, its unlikely your using 90+% of it anyway, so your going to do fatal damage before the PSU hits trip point.

    Besides which, if your motherboard shorts, and the psu doesn't trip in time, its not the PSUs fault anyway, and the motherboard would be covered under warranty as its a failure of the motherboard, not the PSU.

    I view it more as marketing spin....
     
  9. hypaspid

    hypaspid TS Rookie Posts: 26

    It was an entertaining article at least. I just looked up the specs of my psu earlier today after responding to a thread about a psu. 1080 watts max supplies just on my 12v rails. This a marketing ploy for antec or something
     

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