Today the PCI SIG indicted that the voting in the 0.9 version of the standard for PCI Express 6.0 has been sent to the members to vote on. Once this is vetted the home stretch for version 1.0 can begin. Recall that PCIe 6.0 was announced some 2 years ago.

The PCIe 6.0 specification features include:

  • 64 GT/s data rate and up to 256 GB/s via x16 configuration, doubling the bandwidth of the PCIe 5.0 specification
  • PAM-4 (Pulse Amplitude Modulation with 4 levels) encoding and leverages existing 56G PAM-4 in the industry
  • FLIT (flow control unit)-based encoding
  • Low-latency Forward Error Correction (FEC) with additional mechanisms to improve bandwidth efficiency
  • Backwards compatibility with all previous generations of PCIe technology

The final standard should be ready in 2022 when a new wave of corporate servers ship.

Outside of the M.2 SSD, not much bandwidth is needed for the video card. Some time ago somebody benchmarked A Radeon card with several PCIe speeds and number available lanes. The results were as expected. 64 GB/s should perk up loading Windows once consumer systems with PCIe 6.0 surface circa 2023 or so. At present consumer hardware is barely even at PCIe 4.0 speeds.

The bandwidth will be appreciated for database servers for services like Twitter, Facebook, Instagram and QQ etc.