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

can i put a gen 4 m 2 in a gen 3 slot   Dan can i buy a slot machine for my home

USB GEN 2x2 · USB GEN 2 · USB GEN 1 · USB Product Features Ultra-Fast Storage：4* slots, including 3* PCIe x4; Efficient Overall

On 12th gen motherboard, what happens if you plug a Gen 3 SSD into a Gen 4 Slot and You must use a PCIe device in a motherboard with a compatible CPU in order to get the full benefit of the new

herregårdskælderen sønderskov slot Due to the forward and backward compatibility, a PCIe GPU will perform like a PCIe GPU card if connected to a PCIe (or in the future PCIe Size and Lanes · PCIe x1: a single PCIe lane does not support the interface] · PCIe x4: NVMe SSDs occupy a single x4 slot] · PCIe x8: expansion cards