PCIe
Wikipedia: "PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe, is a high-speed standard used to connect hardware components inside computers."
PCIe Link Training Overview. View
The TI application note explains the PCIe link training and link equalization processes.
Compute Express Links. View
Wikipedia: "Compute Express Link (CXL) is an open standard interconnect for high-speed, high capacity CPU-to-device and CPU-to-memory connections, designed for high performance data center computers. It is built on top of PCIe."