Version 5.0 of PCI Expresss (aka PCIe) was first demonstrated in 2017, but is only now coming to the fore. AMD’s upcoming AM5 socket will support PCIe 5.0, as will Intel’s new LGA1700. There are already some motherboards and CPUs with PCIe 5.0 on the market (for example Intel Adler Lake desktop CPUs), but not many.
Today the PCI-SIG unveiled PCI Express 7.0, the final specification of which is expected to be released in 2025, while the first PCIe 7.0 devices are expected to hit the market in 2027 or thereabouts. This will obviously be preceded by PCIe 6.0, which we should see starting to appear in the server parts next year.
The near future will bring hardware that can offer impressive bandwidth. Each generation of PCIe doubles the speed of the previous one. This means that v6.0 is twice as fast as the PCIe 5.0 parts you may soon have at home, v7.0 will be four times faster than v5.0.
To put it more concretely, PCIe 7.0 will transfer 32GB / s over a single bi-directional connection. It’s as fast as a full 16x PCIe 3.0 connection, which was standard on robust GPUs until recently. The maximum bandwidth is 512GB / s for a 16x connection.
PCIe 7.0 will use PAM4 signaling, introduced with version 6.0. The new generation will focus on improving energy efficiency, keeping latency low and maintaining backward compatibility with previous standards.
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