How many watts will I need for this system?

So my system has an i5 2500K, not overclocked
Gtx 560 ti 448 cores edition
8gb of ddr3 1600 mhz ram
1tb 7200 rpm hdd
i currently have a 450w xfx 80+ bronze psu, but im thinking about upgrading the gpu to an msi gtx 660 twin frozr iii edition, will 450w be enough? or will i need a bigger psu?
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  1. What's the exact PSU?
  2. WarWolverineWarrior said:
    What's the exact PSU?


    xfx 450w pro v2 80+ bronze certified
  3. I could'nt find the exact one on google. It looks like a 12v rail. And yes it will handle GTX 660.
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