Do I need a bigger PSU to safely overclock this system?

IronSpartan782

Honorable
May 10, 2013
25
0
10,530
My system is

AMD Phenom II X4 945 3.0 GHz
8GB Corsair Vengeance (2X4)
EVGA GTX 560 Ti
1 TB HDD
4 Case fans 1 with LEDS
Asus M5A78L-M LX PLUS motherboard
No CD drive
Corsair CX500M PSU

Is my power supply enough to overclock my 560 Ti and maybe my Phenom II?