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SESK: Stuff Everyone Should Know · sesk.info/ai-first-tpu-mac-array

What sat at the heart of Google's first published datacenter TPU?

A 65,536-unit 8-bit matrix multiply array.

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  1. A 64-bit desktop CPU
  2. A mechanical relay bank
  3. A 65,536-unit 8-bit MAC array ✔

Why: The first TPU paper described a large array of multiply-accumulate units. That structure delivered high throughput for neural-network matrix multiplication.

Huh, didn't know that: The chip's stated peak throughput was 92 tera-operations per second.

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The TPU multiplied its opportunities and accumulated success.
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References

Answer: A 65,536-unit 8-bit MAC array. The first TPU paper described a large array of multiply-accumulate units. That structure delivered high throughput for neural-network matrix multiplication.

  1. Google Research: In-Datacenter Performance Analysis of a Tensor Processing Unit research.google/pubs/in-datacenter-performance-analysis-of-a-tensor-processing-unit
    The heart of the TPU is a 65,536 8-bit MAC matrix multiply unit
    Checked 2026-10-10.

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