PCIe 4.0 is the current standard connection type for most computer components released today‚ but what is it‚ and how does it compare to PCIe 3.0? This guide delves into everything you need to know about the 4th generation of PCI Express and beyond. Table of ContentsWhat does PCIe mean?How is PCIe 4.0 different than PCIe 3.0?Is PCIe 4.0 backwards compatible?What are PCIe lanes?Is it worth upgrading from PCIe 3.0 to 4.0?Which processors support PCIe 4.0?When is PCIe 5.0 coming out?Should I wait for PCIe 5.0 before upgrading to 4.0?Key takeaways What does PCIe mean? PCIe (sometimes known as PCI-Express) stands for Peripheral Component Interconnect Express. It’s a connection avenue between a computer’s motherboard and a peripheral‚ such as a graphics card or SSD. If you’ve ever switched out a graphics card in your gaming PC‚ you will have placed it into a PCIe slot. How is PCIe 4.0 different than PCIe 3.0? The key difference between PCI...