DisplayPort functions exclusively in the PCIe 4 port, not in PCIe 1.
DisplayPort functions exclusively in the PCIe 4 port, not in PCIe 1.
Last week I enhanced my monitor and began utilizing the DisplayPort connection on my GPU. My motherboard, an Asrock Fatal1ty B360M Performance, features two PCI Express 3.0 x16 slots, yet I only receive video through PCIe1 when using the HDMI port. Both DisplayPort and HDMI function properly in the PCIe4 slot. It might be a BIOS setting or a hardware concern with my motherboard.
It seems your setup involves switching the graphics card within the PCIe lanes on the motherboard.