How to calculate what psu needed

[neckneck]

i have a radeon 7770 i3-3220 gskill 4 gigs of ddr3 1600mhz b75 motherboard and i am getting a 500w antec psu. is this psu going to be enough?

 

[johnsonjohnson]

Hi. Yes it's more than enough.

 

[Brett928S2]

Easily