Your power supply is not really a quality unit.
Your GTX 570 requires 550 watts. A decent 600 watt PSU would be working hard to power it after the power supply is 2-3 years old.
The problem with cheaper power supplies is that no one verifies the power rating, thus they can slap whatever power rating they want on the sticker. In reality most of them that say 600 watts could not sustain powering anything at 450 watts.
I would be willing to bet that if you put a quality psu in your system it will boot right up.
Since 550w is the recommended you should provide yourself a little more wiggle room then just 50 watts so I would look at a 650 watt psu.
You should look at Seasonic, XFX, EVGA, Antec, Corsair (HX, TX, RM series) or Rosewill Capstone/Hive PSUs if you have newegg where you are from.
You want something at least in Tier 2 class B or higher of this list:
http://www.tomshardware.co.uk/answers/id-1804779/power-supply-unit-tier-list.html
The last part to go cheap on is the part that can fry everything else!