2 +12v rails and 1 graphics card

G

Guest

Guest
Hi, I have this Power Supply: Cooler master 500w
http://www.newegg.com/Product/Product.aspx?Item=N82E16817171031

it has 2 +12v rails each 18amps and only 1 pcie 6 pin connector

I know that this psu isnt exactly the best but if a video card requires 24amps and I only have 18 amps X2 can I safely run the card??? does it mean that I have up to 36amps? I read online that 1 12 rail is better but the one I have has 2 weak ones.

Thanks.
 
G

Guest

Guest
so what is the advantage of having a huge single rail? also, sorry if this is a stupid question but how did you get 30amps, I cant find it on the label, it only shows 2 12v rails 18a each and 360w combined.
 

daedalus685

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Nov 11, 2008
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well, 360/12 = 30.. high school physics :)

Anyway.. A single large rail does not really add much over a well built multi rail system. Though the first few multi rail systems were not set up very well and did not always both send multiple leads to a particular line, sometimes you would only get 18A (or whatever a single rail would be) at the PCIe connection.

PSU companies will go on about how single rail is more compatible blah blah blah, but so long as you are getting a quality unit it doesn't matter.
 
G

Guest

Guest
thanks, i remember now, i just though that combined output of 2 rails is found by adding them, but 30amps is more then enough for my setup anyways