What is PCIe Bifurcation? -

ROG Strix z690-E and 2x z690-G 's top PCIE Slot not detecting GPUs pcie slot gpu PCI Express slots on the motherboard can be wider then the number of lanes connected For example a motherboard can have x8 slot with only x1 pcie x1 slot function Most motherboards have one PCI-Express x16 slot for a video card and one or more x1 slots for other things like network adapters Less common are x4 and x8

pcie slot gpu Comments I'd recon not having all pcie cables in the gpu would probably be the cause Atleast the most likely cause You could try buying a cheap gpu thats