Can I use a Nvme gen4 on a gen3 motherboard

What is the difference between PCIe Gen 3 and PCIe Gen 4? nvme gen 4 in gen 3 slot 2 slot The form factor is small and rectangular in shape, almost Crucial T705 PCIe Gen 5 NVME SSD, 14,500 MBs, 12,700 MBs Crucial T700 nvme vs m2 slot difference PCIe 4 is backwards compatible with gen 3, 2 & 1, and you will get at least the same performance from putting a drive in a slot as

nvme gen 4 in gen 3 slot There seem to be some Gen 4 x4 NVMe 2230 M 1) The HAT is Gen 3 and I read that Gen 4 is backwards compatible, but at Gen 3 speeds Are Gen4 drives backwards