”Looking at Nvidia’s HGX boards, the chipmaker is able to achieve around 900 GB/sec of bandwidth, which works out to 7.2 Tb/sec, between each of its accelerators using NVLink. By comparison, Harris claims Lightmatter has a project coming out that’s 60 Tb/sec leaving the chip, which is 7.5 TB/sec of bandwidth per chip.”

https://www.nextplatform.com/2024/01/04/how-lightmatter-breaks-bandwidth-bottlenecks-with-silicon-photonics/amp/