HBM is a high-performance memory that delivers exceptional bandwidth at reduced power and in a compact footprint. It utilizes 2.5D packaging with a wide interface and relatively low clock speed to deliver high throughput at a high bandwidth-per-watt efficiency for AI and HPC applications.
The Rambus HBM2E Controller is fully compliant with the JEDEC JESD235B standard. It supports data rates up to 3.6 Gbps per data pin. The interface features 8 independent channels, each containing 128 bits for a total data width of 1024 bits. The resulting bandwidth is 461 GB/s per stack, with the stack consisting of 2, 4, 8 or 12 DRAMs. Together with the Rambus HBM2E PHY it comprises a complete HBM2E memory interface subsystem.
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