I have corsair 850w bronze, and will overclock i5 quad core + GTX 570 (fabric overclocked).
Im using 16 gb 1600mhz ram, and a SSD 120 gb.
Would this be enough to run the whole system stable (with the i5 and GTX 570 overclocked)
yes, that is plenty of power. overcloking that cpu will not drastically increase the power consumption.
i am running an i5 2500K OC'd to a modest 4.2Ghz with a HD6850 (also OC'd) and an old fashioned mechanical hard drive which uses much more power than an SSD on a 520w Seasonic power supply.
you should even be able to add an additional GTX570 for SLI, maybe even a third with all that power!
570's use 221 watts I believe...CPU 95 watts.....HDD what like 35 watts....RAM like 20 watts....I may be off on some of those figures but 850 watts is a gob of power...I X-Fire 6870's on a 125 watt X4 965 OC'ed to 4.3 GHz , 2x4GB 1.65v RAM with 3 HDD's (2 in hot swap bays) 1 SSD, 1 Blu-Ray player, (5) 120mm fans...All on a 550-watt PSU