How big of a power supply do I need?

[xGrunt21]

How big of a power supply do I need for a computer with a ATI 5770, AMD Phenom II x4 955 Black Edition, MSI AM3+ Mobo and 8 gigs of 1333 ram?

Will a 550w Antec PSU make do?

 

[popatim]

GPU is ~110W max, CPU is 125W, motherbd about another 110w... so yeah that is more than enough juice with room to crossfire later if you want another 5770

 

[xGrunt21]

Thank you.