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

What is PCIe x1 slot used for? - STC-Cable pciex1 slot A PCIe x1 slot has exactly one PCIe lane to use, and the same rule will generally apply moving up the ladder through x4, x8, and x16 slots Each available PCIe pciex1_1 slot There are two possible meanings for PCIe1: PCIe and PCIe x1 PCIe refers to any PCIe slot which uses the first version of the PCIe

pciex16 slot What are PCIe x1 Slots Used For? A PCIe x1 slot is used to plug in low-demanding PCIe expansion cards that do not have a very high throughput