What is the purpose of the PCIe X1 slot

You are not supposed to run A PCI-E 1x card in A 16x slot as far as I know I hope you don't burn anything up in there

However, there is usually a cost increase incurred with higher lane counts PCIe Slot Differences Photo from 20050531pci-express-cards

pcie x4 in x16 slot PCIe x16 slots are generally intended for use with Graphics Cards PCIe 1x slots are generally for smaller add-in cards like Wifi Adapters, USB Adapters, or

pcie nvme slot Install a low profile video card into a system with only a x1 PCIe slot • Install x4 or larger PCIe cards into a system with only x1 PCIe slots available