What size PSU do I need?

Hi, i'm planning on building a gaming pc with these parts, I was wondering what size psu and which model would suit this build, thanks.


CPU: AMD FX 8350

GPU: AMD Radeon 7950

Motherboard: Asus Sabertooth 990FX R2

Case: Bitfenix shinobi black with window

Storage: Seagate SV35.5 HDD

RAM: Corsair Vengance 8gb (2x4gb) DDR3



550W would be more than enough. Brand wise I'd go Seasonic or XFX.