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Amps/Volt rail Question

post #1 of 5
Thread Starter 
I'm putting together my shopping cart for my new computer I am making. On inspection of my graphics card choice and PSU, I became a bit confused.

I'm going to have http://www.newegg.com/Product/Produc...82E16814130593 this card in sli.

The power supply I currently have picked out is http://www.newegg.com/Product/Produc...82E16817121037

Now the cards say they need "550-watt power supply with a minimum of 38 amps on the +12 volt rail", but my PSU outputs are "+3.3V@24A, +5V@30A, +12V1@20A, +12V2@20A, +12V3@20A, +12V4@35A, +12V5@35A, +12V6@20A, -12V@0.5A, +5VSB@5.0A"

There are 2 rails that have 12V4@35A, will this be enough? If not, could you suggest a psu that would.
post #2 of 5
You don't need 1,000w for a pair of GTX570s, a 750 would do it, an 850w unit would have plenty.
This antec hcg 900 would do perfectly for $130,
Or how about the Corsair TX850v2 for $125 after MIR?
Or if you want modular, and gold, then this AX850 is perfect.
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Ryzen 5 1600
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post #3 of 5
The 570 uses two, six-pin power connectors per card. Your power outputs are 20amps on a single 4-pin connector. Therefore, when you plug two outputs into the card, you are supplying 40amps per card. You'll be fine.

As noted though, you could get by with a quality 750w or 850w for SLI 570s.
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Eagle Five
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post #4 of 5
Thread Starter 
So going on what both of you said, if I went with the antec hcg 900 would I just put 1 of the +12V1@40A cables into each of the cards? So one of the +12V1@40A for each card.
post #5 of 5
What they've said is incorrect.


Forget that rails exist. Forget them... You're not forgetting them. Do it. Exclude them from your mind, breathe deep, and take solace in the fact that you aren't worrying your butt off over something completely irrelevant.


Buy a quality 750-850W power supply.
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