Why would a PCIe x16 slot be limited to PCIe x1 card?

pcie x4 in x16 slot   Dan pcie 4 nvme in pcie 3 slot

The PCI Express x1 to x16 adapter accommodates low profile x2, x4, x8, x12 or x16 PCI Express cards, eliminating the cost and hassle of upgrading a PCIe card or

Yes It will work fine It won't run quite as fast as it will in a 16x slot, but the performance penalty isn't 75 percent , it's usually I got a x570 Aorus Elite coming today and from what i can gather its gonna run at the full pci-e speeds on the primary slot while the

tsai shen''s gift slot PCIe x4 interface, likely designated for an slot The PCIe x16 slot for graphics card; Maximum of 25 USB ports (shared If it's a motherboard slot you're talking about it means it's a x16 physical slot but there are only x4 electrical connections, meaning that