I have recently upgraded my 960 nvidia card too a 1080TI, everything works great and runs great. I placed the 960 card in other rig which has a P8Z77-M Motherboard )which was in it before( and I start up the computer and the fans on the video card will spin for about 15 seconds then shut off while the motherboard doesn't detect the video card at all. I then well remove the 960 from the P8Z77-M board and place a 550 TI in and it fires right up, I then place the 960 back into the rig where I have my 1080TI and it fires right up... I am not entirely sure what is wrong.