The Msi RX 580 video card is not detected in the device manager or the output signal to the monitor. Everything is connected correctly. When I am connected to the GPU, I do not even see the BIOS screen, and every time I start, a device error is not connected, which disappears after several restarts. I suspect that when I uninstalled the Nvidia driver while the AMD card was installed, this could have caused this problem. My motherboard is gigabyte z97 gaming 7 updates to the latest biographies. Thanks for your help.