The 2nd-generation 8 GB HBM2 memory is the industry's first such solution capable of delivering a data transfer speed per pin of 2.4 Gbps. This memory is branded Aquabolt and directly succeeds the original HBM2 known as Flarebolt.
https://www.notebookcheck.net/Samsung-begins-mass-production-of-2nd-generation-HBM2-memory.277598.0.html