I have a really odd issue with 2 hp z440 workstation computers. They came with Quadro 310 video cards and I would like to upgrade them. The problem is any time I put a different video card in it it will not boot. I don't even get a bios/uefi screen. I have tried quadro 2000, AMD RX480, NVidia 970, etc... but same issue. As soon as I turn on either computer i just get a blank screen. Any ideas? I do have the latest bios/uefi in there too. I have never had a desktop with this issue before, and 2 of the same issues.