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How to Wire 2 PSU's for redundancy?

post #1 of 15
Thread Starter 
Hi everyone, I have been working on a server project and I was wondering how would I wire up 2 standard ATX Power Supplies so that they both power the same computer and that if one failed the other could keep it on? I am ok at electronics and wiring so it would not be hard for me to wire up recifiers or convertors if necessery.

Many Thanks! smile.gif
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post #2 of 15
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post #3 of 15
Thread Starter 
Quote:
Originally Posted by joemaniaci;13418586 
link

Thanks, I have read that tutorial but it still does not fix the problem that if the other power supply fails then the motherboard would lose power and the computer would fail. I need to find a way so that they could both power everything at once.
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post #4 of 15
I work with servers a lot but I've no experience with rigging stuff that's not made for it. I would think the motherboard would need to support it rather than the PSUs.
post #5 of 15
Couldnt you just get a Uninteruptable Power Supply (UPS) or make one? I know nothing about them other than that they exist tongue.gif
    
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post #6 of 15
Can't you just buy a redundant server PSU? Or do they have compatibility issues with consumer boards?
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post #7 of 15
Thread Starter 
Quote:
Originally Posted by donk165;13418908 
Couldnt you just get a Uninteruptable Power Supply (UPS) or make one? I know nothing about them other than that they exist tongue.gif

I have a HUGE UPS biggrin.gif, but it still wont keep the server powered if the PSU fails.
Quote:
Originally Posted by Shub;13418881 
I work with servers a lot but I've no experience with rigging stuff that's not made for it. I would think the motherboard would need to support it rather than the PSUs.

I dont know, I mean if you could make it so the there is always the right amount of power going to the motherboard does it really care where it is coming from. The HP servers I have worked with have a power convertor which balances the load over the 2 PSU's, but its output is still a standard motherboard connector.

And for the last point I havent seen any redundant PSUs that are cheap enough for me or have a standard ATX form factor. There must be some way to do it confused.gif
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post #8 of 15
What you want doesn't exist. For you to have two PSUs that work in case one fails, you would need two of every power connecter on the motherboard and everything else in the computer. Or some server-psu(which sounds like what you said above) that has two of everything on the inside and is made for that specific purpose.
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post #9 of 15
Better to get a high quality power supply that won't fail, rather than spending enormous amounts on a redundant PSU you don't necessarily need. And no, it isn't really feasible to make a "redundant" PSU out of two ATX PSUs.

From my experience, figures I've seen, and industry talk, power supplies made by Delta Electronics tend to have the highest relative build quality and lowest failure rates in their classes. The only retail PSU brand offering PSUs made by Delta at the moment is Antec. Portions of the Basiq Plus, VP, Earthwatts, Earthwatts Green, and HCG series, and all of the Signature, CP, and HCP series are made by Delta.

Best choice for your situation is probably the High Current Pro series, or Signature. Since Signature are no longer manufactured and most places still selling them are selling them for more than the HCP series, I'd say HCP is the way to go. I have an engineering sample of the HCP-1200, and I can attest to the fact that it's a high-tech, well-engineered, high-quality piece of kit. The 750W and 850W units are based on a slightly different platform, but are still very, very high quality.

An HCP-750 or HCP-850 would probably more than meet your needs.
post #10 of 15
I think you have to get PSUs specifically designed for redundancy in mind. Delta is the only brand that comes to mind as Phaedrus said.
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