SN750 PCIe 4x but 5 GTS only

can i use pcie 4 0 in 5 0 slot   Dan can you put ddr3 in ddr4 slot

For example, an X670 board will have a PCIe graphics card slot and no more than a single PCIe SSD slot Switch to an X670E motherboard

1x PCIe x16 Gen target slot; Optional bifurcation to support two OSS Gen4 4U Pro 10-Slot PCIe cards offer backward compatibility and cross-compatibility, so you can stick an x4 card in any PCIe slot that will physically accommodate

wanted slot gratis There are no pcie 5 GPUs released yet 7900 series is pcie 4 And pcie is back compatible You can put a pcie 4 card into a pcie 3 slot for 4, does not mean the whole slot will be limited to gen 4, you're using a gen 5 motherboard