Now, recomended power supply for this card is "minimum of 550W ( with 12V current rating of 38Amper )
I wanted to know how it works, cause my PSU's got 2 rails 25A, since GPU is powered by 2 x 6pin external cables, common sense tells me that manufacturer of that PSU placed both of those 6 pins on separate rails?
So if my PSU has got 2 x 6pins for PCI express and 2 rails of current 25A, are they separate ?
It is as simple as this:
25A + 25A = 50A x 12v = 600w maximum output wattage on +12v rails
PSU has a swicth that will combine automated dual +12 V rails, and the calculation as it like omnisome said. Don't worry about in , it will fine