PCIe GEN 3 slot with PCIe gen 2 controller causing anomalous

I configure it to PCIe and X4 and learn to write PCIe driver But after insert into my PC's motherboard PCIe X16 slot, I saw it worked in

There are five standard PCIe slots and cards: x1, x2, x4, x8, and x16 The numbers represent the number of lanes on the card or slot Very much

pcie 8x slot The PCIe specification provides implementation details for a PCIe-compliant physical layer device at Gen1 , Gen2 , and Gen3 (8

pcie slot qrelease With full backward compatibility, PCIe provides the same topologies and channel reach for client and server configurations as in PCIe