Should you enter onboard or pci for primary video adapter in system bios?

You should typically select "PCI" for the primary video adapter in the system BiOS if you are using a dedicated graphics card installed in a PCI or PCI Express slot. This setting ensures that the system prioritizes the external graphics card over the onboard graphics. If you are not using a dedicated card and rely on integrated graphics, then "Onboard" should be selected. Always check your specific hardware configuration for optimal settings.