Light Speed Ahead: PCI Express 7.0 Is Here and Optics Are Next

The PCI-SIG consortium has officially finalized the PCI Express 7.0 standard, first announced back in 2022. This version delivers an astonishing 512 GB/s of bandwidth over a standard x16 connection — thanks to 128 GT/s data transfer speeds using PAM4 modulation (also used in PCIe 6.0). For context, PCIe 3.0, still found in some older systems, runs at just 8 GT/s.

But hold your excitement: real-world use is still years away. Compatibility testing won’t begin until 2027, and the first devices using PCIe 7.0 are expected to hit the market around 2028.

The Road to PCIe 8.0  and 1 TB/s

PCI-SIG has also kicked off work on PCI Express 8.0. While technical details are scarce, the pattern is clear — each generation has doubled bandwidth. If this continues, PCIe 8.0 could hit 256 GT/s, crossing the 1 TB/s mark for the first time.

Say Goodbye to Copper — Optics Are Coming

The real revolution isn’t just faster speeds. PCI-SIG is developing Optical Aware Retimer tech, designed for PCIe 6.4 and 7.0. This will be the first industry standard to enable PCIe over fiber optics. Aimed at AI systems, cloud infrastructure, and data centers, optical PCIe may one day reach consumer PCs.

Intel and AMD are already preparing. Intel’s silicon photonics work is over a decade old, and AMD recently acquired Enosemi to develop next-gen optical solutions for AI workloads.