Can I find out if PCI-e slot is , or in linux terminal?

What is the difference between PCIe GEN ⛑️ pcie slot configuration gen1 gen2 gen3 PCI Express Gen1, Gen2, and Gen3 Protocol to Physical Layer Analysis for P67SA16S pcie 20 x1 slot Slot power · x1 cards are limited to A at +12 V and 10 W combined · x4 and wider cards are limited to A at +12 V and 25 W combined · A full-

pcie slot meaning 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