Question - GPU PCIe 4 in a PCIe 3 slot

The good news is that all PCIe components are compatible with PCIe slots; this includes motherboards, graphics cards, SSDs, and other components that

A single PCIe slot can now support x16, x8, x4, x2, or x1 lanes For example, PCIe x4 indicates a Gen 3 expansion slotcard with four lanes

pcie x4 in x16 slot As with previous generations, the standard simply doubles the speed that the PCIe slot runs at It now provides about 2GBs per lane

pcie m2 slot It should be backward compatible, but you will see less performance than if you had it in a PCIe slot since it runs at PCIe x8 instead