I would be leary to run a 560 with that PSU, as it is right around the bare minimum recommended 12v rail. Keep in mind that for a gaming system, 12v amps and rail layout will be just as important as the watt rating(which varies drastically based on each manufacturers testing methodology). With a 33a 12v rail, that will be cutting it close for a 560 with it's minimum 30a requirement. As you get closer to the maximum load on a PSU, your rail fluctiuation and ripple will increase, which can cause everything from random instability to actual damage to parts.
The Rosewell Green TwoCables linked here
for 50 bucks is a much safer bet for not much more cash
. Looks like the CX line "Builder Series" PSU's have gone through some aggressive remodeling for the worse, and I would not recommend them over other similarly priced offerings anymore.Edited by Puck - 8/6/12 at 8:44pm