I have a generic case with a generic psu branded Emerad and labeled 500w. It can handle a HD 7750?
Here are the specifications http://bimg2.mlstatic.com/fuente-de-poder-emerald-500w-para-case-atx_MLV-F-3570771258_122012.jpg
Here are the specifications http://bimg2.mlstatic.com/fuente-de-poder-emerald-500w-para-case-atx_MLV-F-3570771258_122012.jpg