What are +12 V1, V2, V3... on a PSU?

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borko3fkovix

borko3fkovix

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Now i know that they are used to run the gpu but im wondering if they adding to one another, for example if there are +12 V1, V2, V3 and V4 and they are all +18A (one that im considering to buy), do they give out 72A total or what?
 
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Eximo
Yes, those are known as rails. Basically the supply has 4 independent circuits for delivering power. This is not ideal. Single rail designs are easier to manage.

If you do get one. Generally the CPU/Motherboard will be on one rail. Peripherals on another, and your GPU on the remaining two. As long as you evenly distribute and/or lay out everything you should be fine.

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Eximo

Eximo

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Yes, those are known as rails. Basically the supply has 4 independent circuits for delivering power. This is not ideal. Single rail designs are easier to manage.

If you do get one. Generally the CPU/Motherboard will be on one rail. Peripherals on another, and your GPU on the remaining two. As long as you evenly distribute and/or lay out everything you should be fine.

 
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xTempered

xTempered

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It just means there are multiple rails. I personally prefer single rail PSUs but theres nothing particularly better or worse between the two. & yes they give out a total of around what they add up to
 
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