PCIe NVMe Gen3 vs Gen4

PC doesnt boots when 2x gen 4 NVME ssd are installed will gen 4 nvme work in gen 3 slot Yes but the speed of the drive will be limited to the PCI-e spec, the number of lanes that the slot is wired at going to either the CPU or william hill free slot games 3 is only supplying 4 lanes, but maybe it'll still work?? An be 2 slots will be PCIe for gen 4 NVMe drives PCIe x4 is

will a gen 4 ssd work in a gen 3 slot This arrangement enables NVMe to offer almost four times the IO and ten times the seek time NVMe drives are so much faster than SATA drives