i have dell xps 8700 with amd r9 270 but i run linux and amd support for linux is awful so im going to change the graphic card for nvidia gtx 760 which as a bit better performance and supports linux better so my question is this gtx 760 says minimal 500W But i  was thinking of going for HX-650W from corsair but 1-I want to know if its enough W and 2-If its a good power supply the specs of the pc are i7-4770,24gb,2X 240gb ssd,3TB Hdd,Bd+Dvd-Rw and media card reader and dell motherboard can someone help me with this thank you