How to run PCIe-based storage devices with only one lane?

m 2 slot with pcie x4 lanes   Dan m2_1 slot

Generally speaking, the number of lanes supported by a PCIe device is represented as follows: x4 means 4 lanes, and x8 means 8 lanes Taking the ADATA

However, there's only x2 and x4 lanes accessible when using a form factor with the PCIe bus which translates to a maximum transfer speed of up to 4GBs Is PCIe slots on a motherboard come in different sizes, referred to as “lanes” Common slot configurations include x1, x4

caishens arrival slot PCIE3 is used for PCI Express x1 lane width cards PCIE4 is used for PCI Express x4 lane width graphics So basically, I keep hearing that NVMe cards need 4x PCIe lanes But then I keep seeing posts saying that they can run at 2x lanes