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post #1 of 4
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My PSU has 2 +12V rails, each one is 20A.
In the back of the PSU theres a +12V Rail switch, there are two options: "split" and "combined". When I bought it it was on "split" (i think it uses 20A and not 40A). If I need 40A do I switch the switch to "combined"?

I am asking beacause maybe some day I will bring a 8800 GTS...
It Can Run Crysis
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It Can Run Crysis
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post #2 of 4
Hmm.. I don't think you will get 40A. I have two 18A 12v rails but the maximum output of my PSU is 30A on the 12v rails. It's all about the wattage your PSU can put out on the 12v rail.

As for the split/combined switch.. I've never seen a PSU with one of those
    
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post #3 of 4
Quote:
Originally Posted by adam144 View Post
Hmm.. I don't think you will get 40A. I have two 18A 12v rails but the maximum output of my PSU is 30A on the 12v rails. It's all about the wattage your PSU can put out on the 12v rail.

As for the split/combined switch.. I've never seen a PSU with one of those
Agreed.

I'm not sure what the formula is, but you can't add up the rails like that.

And I too have never seen a PSU with a Rail switch ?
    
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post #4 of 4
I have heard of one with such switch... and it was detected that it didn't make a major difference at all...

If you want to be safe, let it sit at split, but when you benchmark and such, combine it.
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