Verified answer

The total power draw for your system is 523 w. I would not try it. You should be at least 100 w above the max draw just to be safe.

a 700 w PSU should do it.

Also, I would get a GTX 680. Apparently, they are supposed to use less energy than 580s, and are more powerful.

I would not try it. The minimum requirements for that card is a 600 watts with 42 amps minimum on the +12 volt rail.

It aint gonna blow up or fry itself in 5 mins it's a quality psu and should work ok, but like the rest i would advise a new one soon as you can