Unbearably Slow PCIe Gen 4 NVME Speeds ard

Can an x8 pcie gen 4 slot run 4x gen 3 nvme gen 4 nvme in gen 3 slot PCIe SSDs are twice as fast as PCIe SSDs But next-generation PCIe SSDs will double PCIe Gen 4 speeds genie wild slot machine On 12th gen motherboard, what happens if you plug a Gen 3 SSD into a Gen 4 Slot and

geng 680 slot Gen 4 SSDs aren't worth it unless you're working with large files and doing a lot of sequential readwrites