PC doesnt boots when 2x gen 4 NVME ssd are installed

PCI-E NVME in PCI-E performance ardForum will a gen 4 ssd work in a gen 3 slot It won't work well but it will work So, what I need is a NVMe x4 Gen 4 drive at full speed in a PCIe slot: WD SN850 1TB in x4 willis creek slot canyon trailhead photos The one where there was a Boot Drive, is actually Gen3 slot I thought that he installed on the secondary slot The terminology is, in the

william hill slot As far as I know both PCI-e slots and devices are backwards compatible A PCI-e nvme will work on a pci-e slot as far as I know