well its enought, but still bare minimum as nvidia recommands 550watts minimum.
ya it runs, but at the limit
Nvidia recommends requirements way over the actual needs due to the proliferation of crappy power supplies that cannot put out what they state they can.
A power hungry system under normal gaming mode with a 570 will consume no more than 300w on the 12v rails under most circumstances. A Corsair VX550 is an older Seasonic made "budget" platform from back in the days and it was and still is a very high quality psu akin to the Seasonic S12II / M12II and its derivatives and equals.
It's more than enough for any system with a single GPU and some overclocking.