What is PCI Express? Do PCIe lanes, slots, and versions matter?

Client PCIe NVMe SSDs typically only use the 2280 form factor because its slim design allows it to easily fit into desktop and notebook PCs Enterprise-

It can be implemented on PC motherboards in regular PCIe slots for expansion cards, or in M PCIe x16 graphics card slot and a PCIe x4

pci slot meaning PCIe Mini: An even smaller form factor PCIe slot that is used in small form factor devices such as laptops or mini-PCs There is also a PCIe x2 that offers

pcie slot sizes Most recent PC's motherboards have PCIe slots just for PCIe cards to be installed in the corresponding PCIe slot (The slot is as wide as or