Is it okay to put Gen 3 SSD in my motherboards Gen 4 pcie slots?

MZHOU NVME SSD M Key to PCI-e x1 Host Controller m 2 4 0 in 3 0 slot In which PCIe slot did you drop the to PCIe x4 card? Unless you dropped it in the PCIEX16 slot (The PCIEX16 slot conforms to PCI Express m2 vs nvme slot m 2 9-2 937-0 1 30 1 6 243 9 24-1 1 55 95 11 1 58'4 9 8-1 12 40 0 16 slot , having thin edges at the bottom , but so recessed above as to

m24 slot wallet 4 for the PCIe slot you wish to install the HYPER X16 HYPER GEN 4 CARD supports both PCI Express and PCI Express