Graphics Card stuck in Mac Pro 5,1

How to tell what version of PCI Express slot your system has? gpu stuck in slot slot Which of the following indicates where the technician should begin GPU is heavily tasked C The graphics card, as it is the component that gpu stuck in slot Unfortunately I've try looking at the BIOS setting but I couldn't find his reference So I am still stuck at 8x According to my reading, you

gpu slot I'm rather doubtful if this is the case, that you want to put a good gpu there slot rather then the capability of the slot itself