When placing a Gen3 x8 configured PCIe board into a Gen4Gen5

pcie slot configuration gen1 gen2 gen3   Dan pcie nvme slot

where as this gen 1 and gen 2 is only for troubled slot not able to run gen-3 and needs to be down grade to gen 1 or 2? may be I should go home

Not asked, but nice to know: A PCI-e v3 card will run fine on an PCI-e v2 slot – Hennes Commented Apr 23, 2014 at 18:41 Add a comment 2 A PCIe 4 is backwards compatible with Gen 1, Gen 2, and Gen 3 while Gen 1, 2, or 3 can slot into a Gen 4 And with the release of PCIe Gen 5

bandit 4d slot Set the PCIe slot as Generation 1, 2 or 3 This slot numbering appears only when data adapter is installed at left wing Some adapters may not operate If everything is working fine, then you should not change these settings Gen1, Gen2, Gen3 refers to PCIE , and signalling standards