https://wccftech.com/amd-radeon-vega-20-gpu-xgmi-pcie-4-interconnect-linux-patch/

AMD Vega 20 GPUs for high-performance computing and server environments would be utilizing the latest XGMI GPU-To-GPU interconnect as revealed in the latest Linux patched (via Phoronix). It has been rumored since 2016 that Vega 20 series of graphics cards will utilize a new interconnect to compete against NVIDIA’s NVLINK solution which was available on their Tesla HPC lineup and has now been expanded to their consumer aimed Quadro and GeForce graphics cards too since the announcement of Turing GPU.

First of all, there’s endless speculation about the AMD Radeon Vega 20 GPU. AMD made it very clear during the announcement of the Radeon Instinct Vega 7nm that it is optimized for server, workstation and Compute markets. AMD also mentioned a new high-speed interconnect, H/W based virtualization and new deep learning operations to be added to their enhanced Vega 20 graphics core.