slot pcie x16 ✓ PCIe x16 GPU card into a PCIe x8 slot?

slot pcie x16
‌PCIe X16 Golden Edge to PCIe X16 Slot Adapter Features : PCIe x16 card edge PCIe x16 slot PCIe Gen 3 16 lanes signals of PCIe designated 4 Layer PCBslot pcie x16 PCIe boards can fit into slots designed for their lane configuration or higher Plugging a x4 PCIe into a x16 slot is acceptable

slot pcie x16Does anyone know of any adapters that can convert a single x16 slot into 4 x4 slots? I've searched around but I cannot find any decent risers or riser cards

slot pcie x16 Ultra Durable PCIe Armor : The metal back plate of PCIe x16 slot for enhanced durability; PCIe UD Slot X： PCIe x16 slot with 10X strength for graphics card