Wikipedia: NVLink

SECONDARY source, used only for link-layer structure that vendor pages do not spell out: a sub-link is 25 GB/s and a link is 50 GB/s bidirectional for NVLink 2.0 and higher, with 4 differential pairs per sub-link from NVLink 3.0 onward; V100 6 links = 300 GB/s bidirectional, A100 12 links = 600 GB/s, H100 18 links = 900 GB/s. Also states NVLink 6 as 3.6 TB/s bidirectional per GPU with nine switches giving 260 TB/s in an NVL72 rack, which conflicts with NVIDIA's own 3,000 GB/s / 216 TB/s and is the basis for the contested NVLink 6 record.