thats a kingwin psu. I wouldnt trust its specs. if it were corsair, psp&c, seasonic, antec I would say its good as they are real world rated (actually underrated in most cases).

CUDA is nvidias language for talking to its cards when you want the card to crunch data (as opposed to displaying a scene in a video game). basically its a set of rules on how to get data to the card, what to do with it, and how to get it out.

its a "install and forget" deal.