What is PCIe 5.0, and how is it different from previous generations?

PCIe 5.0 is the latest consumer-available PCIe serial expansion bus standard iteration. PCIe stands for Peripheral Component Interconnect Express, and its first iteration was introduced in 2003 as an upgrade over older PCI, PCI-X, and AGP standards. The name can also be written as PCI Express or PCI-e. Over the past decade, PCIe has become the most common motherboard interface for various devices, from graphics cards to SSDs and Wi-Fi cards. Each PCIe revision doubles the data throughput of the previous generation, and this is the case with the PCIe 5.0 specification as well.