The PCI Special Interest Group (PCI-SIG) officially released the PCI Express® (PCIe®) 6.0 specification in early 2022, marking a significant milestone in high-speed interconnect technology. This standard continues the industry's tradition of doubling bandwidth every three years, targeting the extreme data demands of AI, machine learning, high-performance computing (HPC), and next-generation data centers.

"No," Elias said, his eyes locking onto a section regarding Equalization . "We use the spec against itself. Section 8.4. We need to adjust the Presets."

He sat back down, his fingers flying across the keyboard. He wasn't going to rewrite the hardware; he was going to retrain the link. He initiated the equalization handshake manually, bypassing the automatic firmware that had been failing them.

| Version | Year | Data rate (GT/s) | Encoding | Signaling | |---------|------|----------------|----------|------------| | 5.0 | 2019 | 32 | 128b/130b| NRZ | | 6.0 | 2022 | 64 | 1b/1b (FLIT) | PAM4 | | 7.0 (draft) | 2025 (announced) | 128 GT/s | FLIT | PAM4 + improvements |

He highlighted a paragraph in the PDF. 'The channel must support the frequency components required for PAM-4 signaling without excessive distortion.'

Switched from variable packet sizes to Fixed Flow Control Units (Flits) to support FEC and increase efficiency.

PCIe Base Specification 6.0 PDF: A Deep Dive into the 64 GT/s Standard