Want to know about Power Supply...

[Noom]

Hi Guru,

What's the significant important of power supply to system?
I bought a case and it included 400 W power supply.

Is that enough for running Opteron 146 now and the future when I need OC?

 

[NosBoost300]

hrmm well what kind of power supply is it.. i think most people would say you want something with dual 12v rails or something like that

 

[Noom]

What's the important things of dual 12V? Why does it costly?