Upgrading to an HD 7970?

[kieren-]

Can i upgrade to an hd 7970 or do i need to change my cpu?

Current specs.

i5 3470

asus p8h77mle

CX 430

hd 6750

 

[acerace]

You may need to change the PSU to at least 550 W one. This SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply will do the job just great. Plus, you can keep it for a longer time.

The rest of the spec is fine.