I got a new PNY GTX 960, knowing I have all of the right connections, enough watts, and just all the right stuff, I researched a lot. Previously I got a 750 TI, and it was a big thing for me and my Dad because we needed a new PSU, and just really the knowledge to do this, anyways that time it worked like a charm. But today when I install the 960, knowing everything is right, I plug it in and all that. But it doesn't boot at all, AT ALL. But when I plug in my 750, it worked alright again! I want to know what is happening! The computer is a HP p7-1534, an A8-5500 if that can affect anything.