Will this work ?

Ok so I was looking at doing this:

Thermaltake v3 Black Edition Case
6 x 120MM Case Fans
ASrock z77 Extreme 4 Motherboard
MSI 660 TI 3gb Video Card
Intel i5 3570k Processor
Corsair Vengeance XMS3 1333mhz 8gb (2x4gb) ram
500gb 7200rpm hard drive
Standard CD-Rom
Cooler Master v8 Processor Cooler
PSU Antec Neo Eco 520w 80 Plus


Is this power supply powerful enough to run this system ?

I plan to overclock the processor to 4ghz, and the video card is overclocked 50mhz on core, and 175mhz on memory clock

Do I need to upgrade the PSU, or is this capable of running this setup ?