Do I have 3rd gen or 4th gen PCIe slots?

pcie gen 4 in gen 3 slot   Dan pcie slot bracket

4-Pin Power Connector up to 5 Gbps Speed PCIe Card · 6 out of 5 Tp-Link Tx401 10 Gbps Wireless Gigabit Pci Express Network AdapterPcie Slot

PCIe or Gen 5 is essentially just a new standard of PCIe that brings double the amount of data transfer compared to PCIe or Gen 4 This enables higher PCI Express Gen 3 x8 but i get the same behaviour if i put it in slot 4 (PCI Express Gen 3 x16 ) is this a known issue

buster hammer carnival slot  An 2280 solid-state drive , 22 mm wide and 80 mm long Connects to, Motherboard via one of: PCIe ×4 3; 4; 5 B650 GAMING PLUS WIFI Supports AMD Ryzen™ 8000 7000 Series Lightning Fast Game experience: PCIe slots, Lightning Gen 4 x4 with