I have never heard of a company called Green that sells power supplies. All I can find is a reference to a local company to the Middle East. If that is the case and it's a local brand I would not trust it. Unless you can find out more information like the OEM there is just not enough information to say yes or no. So you really should go with no to be safe.
You will want a quality 850w unit. Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ, Antec and the higher efficiency Rosewill units for quality.