Tensor Processing Unit#Lawsuit

Compared to a graphics processing unit, TPUs are designed for a high volume of low precision computation (e.g. as little as 8-bit precision){{Cite web |last=Armasu |first=Lucian |date=2016-05-19 |title=Google's Big Chip Unveil For Machine Learning: Tensor Processing Unit With 10x Better Efficiency (Updated) |url=http://www.tomshardware.com/news/google-tensor-processing-unit-machine-learning,31834.html |access-date=2016-06-26 |website=Tom's Hardware}} with more input/output operations per joule, without hardware for rasterisation/texture mapping.{{Cite web |last=Jouppi |first=Norm |date=May 18, 2016 |title=Google supercharges machine learning tasks with TPU custom chip |url=https://cloudplatform.googleblog.com/2016/05/Google-supercharges-machine-learning-tasks-with-custom-chip.html |access-date=2017-01-22 |website=Google Cloud Platform Blog |language=en-US}} The TPU ASICs are mounted in a heatsink assembly, which can fit in a hard drive slot within a data center rack, according to Norman Jouppi.

Different types of processors are suited for different types of machine learning models. TPUs are well suited for CNNs, while GPUs have benefits for some fully-connected neural networks, and CPUs can have advantages for RNNs.{{cite arXiv |eprint=1907.10701 |class=cs.LG |first1=Yu Emma |last1=Wang |first2=Gu-Yeon |last2=Wei |title=Benchmarking TPU, GPU, and CPU Platforms for Deep Learning |date=2019-07-01 |last3=Brooks |first3=David}}

According to Jonathan Ross, one of the original TPU engineers, and later the founder of Groq, three separate groups at Google were developing AI accelerators, with the TPU being the design that was ultimately selected. He was not aware of systolic arrays at the time and upon learning the term thought "Oh, that's called a systolic array? It just seemed to make sense."{{LinkedIn URL | https://www.linkedin.com/feed/update/urn:li:activity:7269734656462180355/}}

The tensor processing unit was announced in May 2016 at Google I/O, when the company said that the TPU had already been used inside their data centers for over a year. Google's 2017 paper describing its creation cites previous systolic matrix multipliers of similar architecture built in the 1990s. The chip has been specifically designed for Google's TensorFlow framework, a symbolic math library which is used for machine learning applications such as neural networks.[https://www.youtube.com/watch?v=oZikw5k_2FM "TensorFlow: Open source machine learning"] "It is machine learning software being used for various kinds of perceptual and language understanding tasks" — Jeffrey Dean, minute 0:47 / 2:17 from Youtube clip However, as of 2017 Google still used CPUs and GPUs for other types of machine learning.{{Cite news|url=http://www.techradar.com/news/computing-components/processors/google-s-tensor-processing-unit-explained-this-is-what-the-future-of-computing-looks-like-1326915|title=Google's Tensor Processing Unit explained: this is what the future of computing looks like|newspaper=TechRadar|language=en|access-date=2017-01-19}} Other AI accelerator designs are appearing from other vendors also and are aimed at embedded and robotics markets.

Google's TPUs are proprietary. Some models are commercially available, and on February 12, 2018, The New York Times reported that Google "would allow other companies to buy access to those chips through its cloud-computing service."{{Cite news|url=https://www.nytimes.com/2018/02/12/technology/google-artificial-intelligence-chips.html|title=Google Makes Its Special A.I. Chips Available to Others|newspaper=The New York Times|date=12 February 2018 |language=en|access-date=2018-02-12 |last1=Metz |first1=Cade }} Google has said that they were used in the AlphaGo versus Lee Sedol series of human-versus-machine Go games, as well as in the AlphaZero system, which produced Chess, Shogi and Go playing programs from the game rules alone and went on to beat the leading programs in those games.{{Cite web|url=https://chess24.com/en/read/news/deepmind-s-alphazero-crushes-chess|title=DeepMind's AlphaZero crushes chess|last=McGourty|first=Colin|date=6 December 2017|website=chess24.com|language=en}} Google has also used TPUs for Google Street View text processing and was able to find all the text in the Street View database in less than five days. In Google Photos, an individual TPU can process over 100 million photos a day. It is also used in RankBrain which Google uses to provide search results.{{Cite news|url=http://www.pcworld.com/article/3072256/google-io/googles-tensor-processing-unit-said-to-advance-moores-law-seven-years-into-the-future.html|title=Google's Tensor Processing Unit could advance Moore's Law 7 years into the future|newspaper=PCWorld|language=en|access-date=2017-01-19}}

Google provides third parties access to TPUs through its Cloud TPU service as part of the Google Cloud Platform{{Cite web|title=Frequently Asked Questions {{!}} Cloud TPU|url=https://cloud.google.com/tpu/docs/faq|access-date=2021-01-14|website=Google Cloud|language=en}} and through its notebook-based services Kaggle and Colaboratory.{{Cite news|title=Google Colaboratory|url=https://colab.research.google.com/notebooks/tpu.ipynb|access-date=2021-05-15|website=colab.research.google.com|language=en}}{{Cite web|title=Use TPUs {{!}} TensorFlow Core|url=https://www.tensorflow.org/guide/tpu|access-date=2021-05-15|website=TensorFlow|language=en}}

The first-generation TPU is an 8-bit matrix multiplication engine, driven with CISC instructions by the host processor across a PCIe 3.0 bus. It is manufactured on a 28 nm process with a die size ≤ 331 mm². The clock speed is 700 MHz and it has a thermal design power of 28–40 W. It has 28 MiB of on chip memory, and 4 MiB of 32-bit accumulators taking the results of a 256×256 systolic array of 8-bit multipliers.

{{cite conference

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| title = In-Datacenter Performance Analysis of a Tensor Processing Unit™

| date = June 26, 2017

| location = Toronto, Canada

| arxiv = 1704.04760

}}

Within the TPU package is 8 GiB of dual-channel 2133 MHz DDR3 SDRAM offering 34 GB/s of bandwidth. Instructions transfer data to or from the host, perform matrix multiplications or convolutions, and apply activation functions.

The second-generation TPU was announced in May 2017.{{cite news|last1=Bright|first1=Peter|title=Google brings 45 teraflops tensor flow processors to its compute cloud|url=https://arstechnica.com/information-technology/2017/05/google-brings-45-teraflops-tensor-flow-processors-to-its-compute-cloud/|access-date=30 May 2017|publisher=Ars Technica|date=17 May 2017}} Google stated the first-generation TPU design was limited by memory bandwidth and using 16 GB of High Bandwidth Memory in the second-generation design increased bandwidth to 600 GB/s and performance to 45 teraFLOPS. The TPUs are then arranged into four-chip modules with a performance of 180 teraFLOPS. Then 64 of these modules are assembled into 256-chip pods with 11.5 petaFLOPS of performance. Notably, while the first-generation TPUs were limited to integers, the second-generation TPUs can also calculate in floating point, introducing the bfloat16 format invented by Google Brain. This makes the second-generation TPUs useful for both training and inference of machine learning models. Google has stated these second-generation TPUs will be available on the Google Compute Engine for use in TensorFlow applications.{{cite news|last1=Kennedy|first1=Patrick|title=Google Cloud TPU Details Revealed|url=https://www.servethehome.com/google-cloud-tpu-details-revealed/|access-date=30 May 2017|publisher=Serve The Home|date=17 May 2017}}

The third-generation TPU was announced on May 8, 2018.{{cite news|last1=Frumusanu|first1=Andre|title=Google I/O Opening Keynote Live-Blog|url=https://www.anandtech.com/show/12726/google-io-keynote-liveblog-10am-pt|access-date=9 May 2018|date=8 May 2018}} Google announced that processors themselves are twice as powerful as the second-generation TPUs, and would be deployed in pods with four times as many chips as the preceding generation.{{cite news|last1=Feldman|first1=Michael|title=Google Offers Glimpse of Third-Generation TPU Processor|url=https://www.top500.org/news/google-offers-glimpse-of-third-generation-tpu-processor/|access-date=14 May 2018|publisher=Top 500|date=11 May 2018}}{{cite news|last1=Teich|first1=Paul|title=Tearing Apart Google's TPU 3.0 AI Coprocessor|url=https://www.nextplatform.com/2018/05/10/tearing-apart-googles-tpu-3-0-ai-coprocessor/|access-date=14 May 2018|publisher=The Next Platform|date=10 May 2018}} This results in an 8-fold increase in performance per pod (with up to 1,024 chips per pod) compared to the second-generation TPU deployment.

On May 18, 2021, Google CEO Sundar Pichai spoke about TPU v4 Tensor Processing Units during his keynote at the Google I/O virtual conference. TPU v4 improved performance by more than 2x over TPU v3 chips. Pichai said "A single v4 pod contains 4,096 v4 chips, and each pod has 10x the interconnect bandwidth per chip at scale, compared to any other networking technology.”{{cite web |url=https://www.hpcwire.com/2021/05/20/google-launches-tpu-v4-ai-chips/ |title=Google Launches TPU v4 AI Chips |website=www.hpcwire.com |date= 20 May 2021|access-date=June 7, 2021}} An April 2023 paper by Google claims TPU v4 is 5-87% faster than an Nvidia A100 at machine learning benchmarks.{{cite arXiv |last=Jouppi |first=Norman |author-link=Norman Jouppi |date=2023-04-20 |title=TPU v4: An Optically Reconfigurable Supercomputer for Machine Learning with Hardware Support for Embeddings |class=cs.AR |eprint=2304.01433}}

There is also an "inference" version, called v4i,{{cite web |url=https://www.servethehome.com/google-details-tpuv4-and-its-crazy-optically-reconfigurable-ai-network/ |title=Google Details TPUv4 and its Crazy Optically Reconfigurable AI Network

|last=Kennedy |first=Patrick |date=2023-08-29 |website=servethehome.com |access-date=2023-12-16}} that does not require liquid cooling.{{cite web |url=https://www.censtry.com/blog/why-did-google-develop-its-own-tpu-chip-in-depth-disclosure-of-team-members.html |title=Why did Google develop its own TPU chip? In-depth disclosure of team members |author= |date=2021-10-20 |website=censtry.com |access-date=2023-12-16}}

In 2021, Google revealed the physical layout of TPU v5 is being designed with the assistance of a novel application of deep reinforcement learning.{{cite journal |last1=Mirhoseini |first1=Azalia |last2=Goldie |first2=Anna |date=2021-06-01 |title=A graph placement methodology for fast chip design |url=http://176.9.41.242/doc/reinforcement-learning/model/2021-mirhoseini.pdf |journal=Nature |volume=594 |issue=7962 |pages=207–212 |doi=10.1038/s41586-022-04657-6 |pmid=35361999 |s2cid=247855593 |access-date=2023-06-04}} Google claims TPU v5 is nearly twice as fast as TPU v4,{{cite web |url=https://cloud.google.com/blog/products/ai-machine-learning/introducing-cloud-tpu-v5p-and-ai-hypercomputer |title=Enabling next-generation AI workloads: Announcing TPU v5p and AI Hypercomputer |last=Vahdat |first=Amin |date=2023-12-06 |access-date=2024-04-08}} and based on that and the relative performance of TPU v4 over A100, some speculate TPU v5 as being as fast as or faster than an H100.{{cite web |url=https://www.techradar.com/pro/google-is-rapidly-turning-into-a-formidable-opponent-to-bff-nvidia-the-tpu-v5p-ai-chip-powering-its-hypercomputer-is-faster-and-has-more-memory-and-bandwidth-than-ever-before-beating-even-the-mighty-h100 |title=Google is rapidly turning into a formidable opponent to BFF Nvidia — the TPU v5p AI chip powering its hypercomputer is faster and has more memory and bandwidth than ever before, beating even the mighty H100 |last=Afifi-Sabet |first=Keumars |date=2023-12-23 |publisher=TechRadar |access-date=2024-04-08}}

Similar to the v4i being a lighter-weight version of the v4, the fifth generation has a "cost-efficient"{{cite web |url=https://cloud.google.com/blog/products/compute/announcing-cloud-tpu-v5e-and-a3-gpus-in-ga |title=Expanding our AI-optimized infrastructure portfolio: Introducing Cloud TPU v5e and announcing A3 GA |author= |date=2023-08-29 |access-date=2023-12-16}} version called v5e. In December 2023, Google announced TPU v5p which is claimed to be competitive with the H100.{{cite web |url=https://cloud.google.com/blog/products/ai-machine-learning/introducing-cloud-tpu-v5p-and-ai-hypercomputer |title=Enabling next-generation AI workloads: Announcing TPU v5p and AI Hypercomputer |author= |date=2023-12-06 |access-date=2024-04-09}}

In May 2024, at the Google I/O conference, Google announced TPU v6, which became available in preview in October 2024.{{Cite web |url=https://cloud.google.com/blog/products/compute/trillium-sixth-generation-tpu-is-in-preview |title=Powerful infrastructure innovations for your AI-first future |last=Lohmeyer |first=Mark |date=2024-10-30 }} Google claimed a 4.7 times performance increase relative to TPU v5e,{{cite web |url=https://hothardware.com/news/google-cloud-unveils-trillium-its-6th-gen-tpu-with-a-47x-performance-leap |title=Google Cloud Unveils Trillium, Its 6th-Gen TPU With A 4.7X AI Performance Leap |last=Velasco |first=Alan |work=HotHardware |date=2024-05-15 |publisher=HotHardware |access-date=2024-05-15}} via larger matrix multiplication units and an increased clock speed. High bandwidth memory (HBM) capacity and bandwidth have also doubled. A pod can contain up to 256 Trillium units.{{Cite web |title=Introducing Trillium, sixth-generation TPUs |url=https://cloud.google.com/blog/products/compute/introducing-trillium-6th-gen-tpus |access-date=2024-05-17 |website=Google Cloud Blog |language=en-US}}

In April 2025, at Google Cloud Next conference, Google unveiled TPU v7. This new chip, called Ironwood, will come in two configurations: a 256-chip cluster and a 9,216-chip cluster. Ironwood will have a peak computational performance rate of 4,614 TFLOP/s.{{Cite web |last=Wiggers |first=Kyle |date=2025-04-09 |title=Ironwood is Google's newest AI accelerator chip |url=https://techcrunch.com/2025/04/09/google-unveils-ironwood-a-new-ai-accelerator-chip/ |access-date=2025-04-10 |website=TechCrunch |language=en-US}}

In July 2018, Google announced the Edge TPU. The Edge TPU is Google's purpose-built ASIC chip designed to run machine learning (ML) models for edge computing, meaning it is much smaller and consumes far less power compared to the TPUs hosted in Google datacenters (also known as Cloud TPUs{{Cite web|title=Cloud TPU|url=https://cloud.google.com/tpu|access-date=2021-05-21|website=Google Cloud|language=en}}). In January 2019, Google made the Edge TPU available to developers with a line of products under the Coral brand. The Edge TPU is capable of 4 trillion operations per second with 2 W of electrical power.{{Cite web|url=https://coral.ai/docs/edgetpu/benchmarks/|title=Edge TPU performance benchmarks|website=Coral|language=en-us|access-date=2020-01-04}}

The product offerings include a single-board computer (SBC), a system on module (SoM), a USB accessory, a mini PCI-e card, and an M.2 card. The SBC Coral Dev Board and Coral SoM both run Mendel Linux OS – a derivative of Debian.{{Cite web|title=Dev Board|url=https://coral.ai/products/dev-board|access-date=2021-05-21|website=Coral|language=en-us}}{{Cite web|title=System-on-Module (SoM)|url=https://coral.ai/products/som|access-date=2021-05-21|website=Coral|language=en-us}} The USB, PCI-e, and M.2 products function as add-ons to existing computer systems, and support Debian-based Linux systems on x86-64 and ARM64 hosts (including Raspberry Pi).

The machine learning runtime used to execute models on the Edge TPU is based on TensorFlow Lite.{{Cite web|url=https://www.blog.google/products/google-cloud/bringing-intelligence-to-the-edge-with-cloud-iot/|title=Bringing intelligence to the edge with Cloud IoT|date=2018-07-25|website=Google Blog|language=en-US|access-date=2018-07-25}} The Edge TPU is only capable of accelerating forward-pass operations, which means it's primarily useful for performing inferences (although it is possible to perform lightweight transfer learning on the Edge TPU{{Cite web|url=https://coral.withgoogle.com/docs/edgetpu/retrain-classification-ondevice/|title=Retrain an image classification model on-device|access-date=2019-05-03|website=Coral}}). The Edge TPU also only supports 8-bit math, meaning that for a network to be compatible with the Edge TPU, it needs to either be trained using the TensorFlow quantization-aware training technique, or since late 2019 it's also possible to use post-training quantization.

On November 12, 2019, Asus announced a pair of single-board computer (SBCs) featuring the Edge TPU. The Asus Tinker Edge T and Tinker Edge R Board designed for IoT and edge AI. The SBCs officially support Android and Debian operating systems.{{Cite web|url=https://www.asus.com/jp/News/jr4skqts65jsuggg|title=組込み総合技術展＆IoT総合技術展「ET & IoT Technology 2019」に出展することを発表|website=Asus.com|language=ja-JP|access-date=2019-11-13}}{{Cite web|url=https://www.anandtech.com/show/15095/asus-google-team-up-for-tinker-board-aifocused-creditcard-sized-computers|title=ASUS & Google Team Up for 'Tinker Board' AI-Focused Credit-Card Sized Computers|last=Shilov|first=Anton|website=Anandtech.com|access-date=2019-11-13}} ASUS has also demonstrated a mini PC called Asus PN60T featuring the Edge TPU.{{Cite web|url=https://www.cnx-software.com/2019/05/29/asus-tinker-edge-t-cr1s-cm-a-sbc-google-coral-edge-tpu-nxp-i-mx-8m-processor |title=ASUS Tinker Edge T & CR1S-CM-A SBC to Feature Google Coral Edge TPU & NXP i.MX 8M Processor|last=Aufranc|first=Jean-Luc|date=2019-05-29|website=CNX Software - Embedded Systems News|language=en-US|access-date=2019-11-14}}

On January 2, 2020, Google announced the Coral Accelerator Module and Coral Dev Board Mini, to be demonstrated at CES 2020 later the same month. The Coral Accelerator Module is a multi-chip module featuring the Edge TPU, PCIe and USB interfaces for easier integration. The Coral Dev Board Mini is a smaller SBC featuring the Coral Accelerator Module and MediaTek 8167s SoC.{{Cite web|url=https://developers.googleblog.com/2020/01/new-coral-products-for-2020.html|title=New Coral products for 2020|website=Google Developers Blog|language=en|access-date=2020-01-04}}{{Cite web|url=https://coral.ai/products/accelerator-module|title=Accelerator Module|website=Coral|language=en-us|access-date=2020-01-04}}

{{main|Pixel Neural Core}}

On October 15, 2019, Google announced the Pixel 4 smartphone, which contains an Edge TPU called the Pixel Neural Core. Google describe it as "customized to meet the requirements of key camera features in Pixel 4", using a neural network search that sacrifices some accuracy in favor of minimizing latency and power use.{{Cite web|url=http://ai.googleblog.com/2019/11/introducing-next-generation-on-device.html|title=Introducing the Next Generation of On-Device Vision Models: MobileNetV3 and MobileNetEdgeTPU|website=Google AI Blog|language=en|access-date=2020-04-16}}

{{main|Google Tensor}}

Google followed the Pixel Neural Core by integrating an Edge TPU into a custom system-on-chip named Google Tensor, which was released in 2021 with the Pixel 6 line of smartphones.{{cite web |url=https://ai.googleblog.com/2021/11/improved-on-device-ml-on-pixel-6-with.html |title=Improved On-Device ML on Pixel 6, with Neural Architecture Search |author1=Gupta, Suyog |author2=White, Marie |date=November 8, 2021 |website=Google AI Blog |access-date=16 December 2022}} The Google Tensor SoC demonstrated "extremely large performance advantages over the competition" in machine learning-focused benchmarks; although instantaneous power consumption also was relatively high, the improved performance meant less energy was consumed due to shorter periods requiring peak performance.{{cite news |url=https://www.anandtech.com/show/17032/tensor-soc-performance-efficiency/5 |title=Google's Tensor inside of Pixel 6, Pixel 6 Pro: A Look into Performance & Efficiency {{!}} Google's IP: Tensor TPU/NPU |author=Frumusanu, Andrei |date=November 2, 2021 |work=AnandTech |access-date=16 December 2022}}

In 2019, Singular Computing, founded in 2009 by Joseph Bates, a visiting professor at MIT,{{cite web |url=https://news.mit.edu/2010/fuzzy-logic-0103 |title=The surprising usefulness of sloppy arithmetic |last=Hardesty |first=Larry |date=2011-01-03 |publisher=MIT |access-date=2024-01-10}} filed suit against Google alleging patent infringement in TPU chips.{{cite news |last=Bray |first=Hiawatha |date=2024-01-10 |title=Local inventor challenges Google in billion-dollar patent fight |url=https://www.bostonglobe.com/2024/01/10/business/local-inventor-challenges-google-billion-dollar-patent-fight/ |work=Boston Globe |location=Boston |archive-url=https://web.archive.org/web/20240110130855/https://www.bostonglobe.com/2024/01/10/business/local-inventor-challenges-google-billion-dollar-patent-fight/ |archive-date=2024-01-10 |access-date=2024-01-10}} By 2020, Google had successfully lowered the number of claims the court would consider to just two: claim 53 of {{patent|US|8407273}} filed in 2012 and claim 7 of {{patent|US|9218156}} filed in 2013, both of which claim a dynamic range of 10⁻⁶ to 10⁶ for floating point numbers, which the standard float16 cannot do (without resorting to subnormal numbers) as it only has five bits for the exponent. In a 2023 court filing, Singular Computing specifically called out Google's use of bfloat16, as that exceeds the dynamic range of float16.{{cite web |url=https://www.pacermonitor.com/public/filings/DCYQIDDI/Singular_Computing_LLC_v_Google_LLC__madce-24-10008__0001.0.pdf |title=SINGULAR COMPUTING LLC, Plaintiff, v. GOOGLE LLC, Defendant: Amended Complaint for Patent Infringement |author= |date=2020-03-20 |website=rpxcorp.com |publisher=RPX Corporation |access-date=2024-01-10}} Singular claims non-standard floating point formats were non-obvious in 2009, but Google retorts that the VFLOAT{{cite journal |last1=Wang |first1=Xiaojun |last2=Leeser |first2=Miriam |date=2010-09-01 |title=VFloat: A Variable Precision Fixed- and Floating-Point Library for Reconfigurable Hardware |url=https://dl.acm.org/doi/abs/10.1145/1839480.1839486 |journal=ACM Transactions on Reconfigurable Technology and Systems |volume=3 |issue=3 |pages=1–34 |doi=10.1145/1839480.1839486 |access-date=2024-01-10|url-access=subscription }} format, with configurable number of exponent bits, existed as prior art in 2002.{{cite web |url=https://casetext.com/case/singular-computing-llc-v-google-llc-1 |title=Singular Computing LLC v. Google LLC |author= |date=2023-04-06 |website=casetext.com |access-date=2024-01-10}} By January 2024, subsequent lawsuits by Singular had brought the number of patents being litigated up to eight. Towards the end of the trial later that month, Google agreed to a settlement with undisclosed terms.{{Cite web |last=Calkins |first=Laurel Brubaker |date=January 24, 2024 |title=Google Settles AI-Chip Suit That Had Sought Over $5 Billion |url=https://news.bloomberglaw.com/ip-law/google-settles-ai-chip-design-suit-that-had-sought-billions |publisher=Bloomberg Law}}{{Cite web |last1=Brittain |first1=Blake |last2=Raymond |first2=Ray |date=January 24, 2024 |title=Google settles AI-related chip patent lawsuit that sought $1.67 bln |url=https://www.reuters.com/technology/google-settles-ai-related-chip-patent-lawsuit-that-sought-167-bln-2024-01-24/ |publisher=Reuters}}

• Cognitive computer
• AI accelerator
• Structure tensor, a mathematical foundation for TPU's
• Tensor Core, a similar architecture by Nvidia
• TrueNorth, a similar device simulating spiking neurons instead of low-precision tensors
• Vision processing unit, a similar device specialised for vision processing

{{Reflist|30em}}

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• [https://cloud.google.com/tpu/docs/tpus Cloud Tensor Processing Units (TPUs)] (Documentation from Google Cloud)
• [https://images.anandtech.com/doci/12195/google-tpu-board-2.png Photo of Google's TPU chip and board]
• [https://cloud.google.com/images/products/tpu/cloud-tpu-v2.png Photo of Google's TPU v2 board]
• [https://cloud.google.com/images/products/tpu/cloud-tpu-v3-alpha.png Photo of Google's TPU v3 board]
• [https://cloud.google.com/images/products/tpu/cloud-tpu-v2-pod-alpha.png Photo of Google's TPU v2 pod]

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Category:Neural processing units

Category:Application-specific integrated circuits

Category:Computer-related introductions in 2016

Category:Google hardware

Category:Microprocessors