PCIe Bifurcation

PCIe x32 However, the connection will run at the speed of the slowest device, so a PCIe SSD can only run at PCIe even in a slot that supports PCIe

Go in to BIOS and Set PCIE to AUTO or Gen 4 it may be getting hung up on the gen 5 PCIE slot So boot to bios from second slot

pcie 4 ssd in pcie 3 slot Primary riser cage connector, connected to processor 1 or the southbridge PCIe 3-slot riser cage* PCIe 2-slot x16 riser cage 1

pcie 2 slot x, , , ) PCIe cards can always operate in PCIe slots with the same or more lanes than the card