Yo, i got a 770gtx 2days ago, and am in hurry to get a new PSU, my choice is very limited.
Can this^ PSU provide these specs: "42 amps on the 12v + rail"?
I don't know much about the PSUs and i really need help asap
It will run it. For awhile atleast the psu is not a very good one. Try to find a Seasonic, Xfx, Superflower, or Antec. A quality 550w psu is enough to run a gtx 770 on most systems.