The future version of the PCIe specification was announced at the PCI-SIG Developers Conference 2022 in California. This comes after the consortium published the final PCIe 6.0 specification in January.
PCIe 7.0 doubles the bandwidth of its predecessor, from 64 GT/s to 128 GT/s, with up to 512GB of bi-directional input (avant encoding overhead and header efficiency) via the x16 connection. Another advantage is that PCIe 7.0 consists of four times the bandwidth of PCIe 5.0.
The new specification will consist of 1b/1b flit mode encoding and is based on the Pulse Amplitude Modulation (PAM4) that was developed with PCIe 6.0. The commission believes that the system is focused on improving power efficiency while delivering low latency and high reliability. PCIe 7.0 will be compatible with all previous PCIe technology.
PCIe 7.0 will be used for applications such as 800 G Ethernet, Artificial Intelligence, Machine Learning, and cloud and quantum computing. It will also be useful in data-intensive areas, including hyperscale data centers, High-Performance Computing (HPC) and the military/aerospace.
PCIe 7.0 devices will arrive in 2025, but the hardware will not arrive until 2028, and there will be a permanent PCIe 6.0 release.
The upcoming consumer PCIe 5.0 NVMe SSDs, which range from 14 GB to 14, are expected to arrive later this year when AMD''s PCIe 5.0-supporting (Intel''s Alder Lake also supports the standard) Zen 4 platform lands, which is expected to be sometime in September.