So I feel I have tried everything I am capable of. Every time I start up my computer with the new GTX 780, my computer goes to this HP splash page, and my keyboard stops functioning. When I press any kind of lock, (num lock, caps lock, scr lock) no lights or anything show up. The only lights that my keyboard shows are the backlit. I can put in my old R6770 and everything works fine! But when I put in the GTX 780 the same error comes up. I tried uninstalling the AMD drivers and installing the nvidia drivers, but it gives me this error and says my graphics card isn't compatible. If anyone can help me with this issue, I would greatly appreciate it!