Okay guys, this might be a silly question... Do I really need a 600W power for GTX770?? My new PC will be use for gaming, but Nvidia said 700 series require 600W. I saw some guys said it doesn't need 600W actually. So is it true?? 'Cause I really don't want pay a lot for 80+Gold power with 600W... And if it is 600W, will it really use 600W if I only do simple task, I mean if I am doing some simple tasks, would it really use the number of your power??