Originally Posted by M.Marcelo
Hello there, I was wondering if the said 43 amp 12 volt output of the Seasonic P520FL will be enough to run an Asus GTX 780 DC II graphics card. I do not know anything about volts etc. so I'd like to know how many amps do I need at least for this card on the 12 volt rail
As long as you keep this card's voltages at stock, you will have more than enough power:
With one GTX 780 under full load in their system, their PSU pulled 340W from the wall outlet. Their CPU was idling, so I will add 150W for the 4770K overclocked fairly heavily. Adding 150W to 340W brings it to 490W being pulled from the wall outlet. This means that if the PSU is 90% efficient while pulling 490W from the wall, then the computer is pulling 441W from the PSU. Your gaming power consumption will be lower, peaking at about 400-425W at the most.
So, you have lots of power.