Will my smps be sufficient?

Best answer selected by Daddycool11.

thanks man

I have the exact same GPU i.e., Zotac 670 AMP! & I'm using the SeaSonic S12II 620Watts Bronze PSU!!

You might wanna reconsider your decision! Have a look here-
http://www.zotacusa.com/geforce-gtx-670-amp-zt-60302-10...

If you look on the right side where it says "ADDITIONAL INFORMATION", you will see "Recommended PSU Wattage - 600-Watt"

Sure it may run fine with a good quality 550W PSU but it is suggested to get a quality 600W or more PSU from any good brand like Corsair, SeaSonic, etc...

thanks man !! now i'm planning to buy corsair gs700 ... anyway thanks for your help i really do appreciate it

Silly manufacturers reccomendation
Nvidia reccomends 500 wattsfor the reference GTX670
They reccomend 550 watts for GTX570
The AMP's power consumption sits between them
http://www.techpowerup.com/reviews/Zotac/GeForce_GTX_67...