https://arstechnica.com/gadgets/2022/01/pci-express-6-0-spec-is-finalized-doubling-bandwidth-for-ssds-gpus-and-more/ > The PCI Special Interest Group (PCI-SIG) has finalized version 6.0 of the PCI Express standard, the communication bus that lets all the stuff inside your computer communicate. The new version of the spec comes roughly three years after the PCI Express 5.0 spec was finalized, and version 6.0 once again doubles the bandwidth of a PCIe lane from 32GT/s (8GB/s in total, or 4GB/s in each direction) to 64GT/s (16GB/s, or 8GB/s in each direction). For a full 16-lane PCIe 6.0 connection, that's as much as 256GB/s of total bandwidth, compared to the 32GB/s or 64GB/s of now-common PCIe 3.0 and 4.0 connections. > Like past PCIe versions, PCIe 6.0 will "interoperate and maintain backwards compatibility" with all existing PCIe versions, so your PCIe 4.0 GPU or SSD will continue to work in a PCIe 6.0 slot and vice-versa. The PCI-SIG bragged about the specification's longevity in a blog post by PCI-SIG board member Debendra Das Sharma: "An interconnect technology is considered successful if it can sustain three generations of bandwidth improvement spanning a decade. PCIe architecture has far exceeded that mark."