Nvidia´s fourth generation NVLink technology provides 1.5X higher bandwidth and improved scalability for multi-GPU system configurations. A single NVIDIA H100 Tensor Core GPU supports up to 18 NVLink connections for a total bandwidth of 900 gigabytes per second (GB/s)—over 7X the bandwidth of PCIe Gen5 . 
Nvidia also annouced in March 2019 that they had reached an agreement with  Mellanox Technologies to buy the company for USD 6.9 Billion \cite{billion}. The Israeli-American company is known for its Infiniband technology used betwenn high-end servers. This has clearly lead Nvidia to develope their interconnected technology further.