Is it okay to use PCI Gen 4 drives with gen 3 slots?

will gen 4 nvme work in gen 3 slot   Dan william hill slot machine

2 NVMe drive of 2280 sizing It has 4x PCIe

Yes, If you motherboard Slot supports PCIe from the chipset then your SSD will work with PCIe But if the Slot is from the Ryzen 7 Gen-4-PCIe-NVMe-M-2-SSDpCSSD-F2000GBMP600 PCIe - GEN 4

itel s23 plus price in nigeria slot Looking at Amazon there is PCIe Gen 3 NVME and PCIe Gen 4 NVME for sale I don't see this even mentioned on the Wikipedia page for NVM Express  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