Locating which PSU rail will power my grahics card

Hello, im buying a graphics card that requires 30 amps on a 12v rail from the PSU. My current power supply has 2 - 12v rails the first 12v rail listed as +12V1 is rated at 32 amps but the +12V2 rail is only 24 amps I can run the graphics card on the first rail but not the second but no matter how hard I try I cant figure out if rail 1 is the rail the graphics card is attached to will it be rail 2 ? If rail 1 then I wont need a new PSU if rail 2 I need to get a new PSU which I dont want to do. graphics card is the http://www.bestbuy.com/site/EVGA+-+GeForce+GTX+560+Ti+2GB+GDDR5+PCI+Express+2.0+Graphics+Card/4699668.p?id=1218511829220&skuId=4699668&st=gtx 560&cp=1&lp=3 and the PSU is a http://www.thermaltakeusa.com/Product.aspx?C=1264&ID=1898
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More about locating rail power grahics card
  1. The graphics card doesn't require 30 amps , the manufacturer reccomends that you have a psu with at least a 30 amp combined 12v output
    Your's is not a very good psu but with a combined 12v output of 48 amps across 2 rails you don't have to worry which is which
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