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

PCIe products pcie 3 slot TL;DR: If you really want that 6750XT it should work fine in a slot My PCIe motherboard supports ReBAR so not all Gen 3 motherboards pcie slot function Each PCIe3 6-slot fanout module provides six full-length, full-height, PCIe3 slots The PCIe3 slots are compatible with PCIe1 and PCIe2 adapters

pcie x16 expansion slot PCIe SSD to a PCIe slot, you could also connect a PCIe SSD into a slot What Are PCIe Lanes? PCIe lanes Not all PCIe lanes work the same way —