ive had my email@example.com and my 780 classified@1375mhz for benching and my little 2 rail 600w ocz modxstream pro is still pushing power and hasn't hit the ocp yet. but admittedly at those clocks i must be very close to the max of this little power supply.
my 600w has 2x25amp 12v rails. your corsair has 1x53amp rail. you will be fine.