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Newly built computer will not turn on


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#16
james_8970

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Not enough Amps on the 12V rails to run your GPU, you need at least 18A. Right now thats the sweet spot, for multiple rails anyways.
I'm going away for the weekend due to Canada day so it's likly I won't post for the next little while. But maybe you'll catch me, whats your budget? This way I can find something that best suits your needs.
James
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#17
turtilboy07

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Sorry about that, I posted the wrong PSU. I'm actually getting http://www.newegg.co...N82E16817159058
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#18
james_8970

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I have never seen amps distributed like that on the 12V rails, I wonder why they did it like that.
In order to have a stable running system be sure to have the 12V2 cable along with either one of the other two 12V cables. If you use the 12V1 and 12V3 cables you can't won't have enough amps to run at it's full potential.
James
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#19
Titan8990

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With the increasing demands on the 12V lines, many new power supplies have multiple 12V rails that will be listed as +12V1, +12V2 and +12V3 depending on if it has two or three rails. When calculating the amps for the +12V line, it is necessary to look at the total amps produces from all of the 12V rails. Often times there might be a footnote that the combine maximum wattage will be less than the total rating of the rails. Just reverse the above formula to get the maximum combined amps.

Amperage = Wattage / Voltage


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