Do i need a new power supply for my gtx 1080 8gb?

[dinodinac2003]

Hello! I have a question for you experts . im buying a gtx 1080 strix 8GB and at the moment i have a PSU 550W SAMA GameStorm GS650 80Plus Gold Black power supply and an i5-6500.
do i need to buy a new one with like 650w or 750w or am i good with my current one?
Thanks!

 

[GhislainG]

What are the specs of that PSU? Who is the manufacturer? It's so inexpensive that I doubt it really is a 550W PSU.