# Nvidia Opens Its Custom Memory Design to Rival Accelerators Through NVLink Fusion

NVHBM moves the memory controller into the high-bandwidth memory stack, claiming 30 percent more bandwidth and 15 percent lower memory power than standard HBM4E, with Amazon's Annapurna Labs as the first partner.

- Published: 2026-08-27T06:20:08.967Z
- Canonical: https://polylog.news/ai/2026-08-27/nvidia-opens-its-custom-memory-design-to-rival-accelerators
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [NVIDIA Blog](https://blogs.nvidia.com/blog/nvlink-fusion-nvhbm-custom-high-bandwidth-memory/), [Tom's Hardware](https://www.tomshardware.com/pc-components/dram/nvidia-custom-nvhbm-promises-30-percent-higher-bandwidth-15-percent-lower-power-than-commodity-hbm4e-custom-base-die-and-phy-will-be-available-to-nvlink-fusion-partners), [NVIDIA Newsroom](https://nvidianews.nvidia.com/news/aws-and-nvidia-to-deliver-2-million-additional-gpus-and-next-generation-infrastructure-for-agentic-and-physical-ai)

Nvidia extended NVLink Fusion with NVHBM, a custom high-bandwidth memory design it will make available to partners building their own accelerators. The change is structural: instead of putting the memory controller on the compute die, Nvidi…

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