quick PSU question

[FishPolice]

Would a 550w PSU such as the XFX Pro suffice for an overclocked 2500k based system? Will only ever be using a single GPU.

I would prefer a 650w of course one but money is tight.

 

[FishPolice]

Thanks for all the speedy responses

All good suggestions. Gonna go with the XFX though since I can get this locally (& suprisingly cheap OCuK!) & need a PSU very urgently.