The PCIe 6.0 specification introduces several fundamental changes to achieve higher performance: PCI Express 6.0 Specification
: It provides a raw data rate of 64 GT/s per lane, doubling the 32 GT/s offered by PCIe 5.0. For a x16 configuration, this reaches a theoretical bidirectional bandwidth of 256 GB/s (128 GB/s in each direction). pci express base specification revision 60 pdf