Gigabyte GTX 770 OC how much Amp on 12V Rail?

Hi o/

I want to buy a Gigabyte GeForce GTX 770 OC Windforce, but i am a bit concerned that my PSU is not strong enough for it. It's a "bequiet!  pure power L8 630W CM" with 2 x 12V rails each 30 Amps (the box diagram says: 12V1: 30A, 12V2: 30A both: 47A)... Logan said in a Video that 42Amps on the 12V Rails are required to run a GTX 770 (i think it was the EVGA GTX 770) 

Sorry for my basic english skills.


Overestimating a 250W draw on the +12V rail, then that would be just under 21 Amps, which is an overestimate, unless you are running an insane OC.

Thanks man!