I'm open-sourcing my experimental custom NPU architecture designed for local AI acceleration

Reddit r/LocalLLaMA / 3/23/2026

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Key Points

  • An individual has open-sourced an experimental custom NPU hardware architecture (“NPU Array (v1)”) aimed at accelerating local AI inference, especially matrix multiplication workloads.
  • The design targets high TOPS/Watt performance for local inference and is intended to help make running large (e.g., 70B+) models locally more power-efficient and cost-effective.
  • The author cautions it is early-stage and not a plug-and-play PCIe-ready chip, with ongoing work focused on resolving routing congestion to reach target clock frequencies.
  • Community members are invited to review the repository, report flaws, and contribute feedback at the intersection of hardware array design and LLM inference.

Hi all,

Like many of you, I'm passionate about running local models efficiently. I've spent the recently designing a custom hardware architecture – an NPU Array (v1) – specifically optimized for matrix multiplication and high TOPS/Watt performance for local AI inference.

I've just open-sourced the entire repository here: https://github.com/n57d30top/graph-assist-npu-array-v1-direct-add-commit-add-hi-tap/tree/main

Disclaimer: This is early-stage, experimental hardware design. It’s not a finished chip you can plug into a PCIe slot tomorrow. I am currently working on resolving routing congestion to hit my target clock frequencies.

However, I believe the open-source community needs more open silicon designs to eventually break the hardware monopoly and make running 70B+ parameters locally cheap and power-efficient.

I’d love for the community to take a look, point out flaws, or jump in if you're interested in the intersection of hardware array design and LLM inference. All feedback is welcome!

submitted by /u/king_ftotheu
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