How much watts i need for amd radeon 7870

sharkstale20

Honorable
Dec 29, 2012
3
0
10,510
How much watts will i need for a amd radeon 7870 or a diamond amd radeon 7870

Computer spec : Cpu: AMD FX(tm)-4100 Quad-Core Processor
Ram: 16gb
Power supply: 500watt Plus 80
Window 7 Ultimate edition

Can i get requirement Watts for both Gpu or is mine Psu good enough.