The latest PCI Express (PCIe) specification again doubles the data rate over the previous spec.
PCI Express 7.0 calls for a data rate of 128 gigatransfers per second (GT/s) and up to 512 GB/s bi-directionally via x16 data lane slot (not every PCI Express slot in a PC or server uses 16 transfer lanes), according to PCI-SIG, the industry group that maintains and develops the specification.
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The slower, previous spec, PCI Express 6.0 has yet to come to market, and doubling the rate with each version has become the norm.
Source:: Network World – Data Center