Google releases the eighth-generation TPU 8t rack-scale network architecture details

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AIMPACT News, May 16 (UTC+8), Google disclosed the architecture details of the eighth-generation TPU (TPU 8t) rack-level connection to the Virgo network. The network uses high-radix switches and a flat two-layer non-blocking topology, increasing data center network bandwidth by four times compared to the previous generation, with a single structure capable of connecting over 134k TPU 8t chips, providing 47 Pb/s of non-blocking bidirectional bandwidth and nearly linear scaling performance of over 1.7K ExaFlops. The TPU 8t itself adopts a 3D torus topology, with a single super pod scalable to 9,600 chips, and supports expansion to over one million chips via JAX and Pathways. Key technologies include SparseCore accelerators, VPU/MXU overlap and balanced scaling, native FP4 support, and integrated Arm-based Axion CPUs to eliminate host bottlenecks. This design addresses the evolution of AI models from dense large language models to large-scale mixture-of-experts models and inference-intensive architectures. (Source: InFoQ)
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MosaicBowtieRealm
· 10h ago
Single super pod 9600 chip, I counted the zeros, wow.
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LiquidityTeaMaster
· 05-27 04:44
The name “Virgo Network” is well chosen—its non-blocking, Virgo-style obsessive-compulsive mindset.
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ZkSketcher
· 05-27 03:08
Near-linear scaling to 1.7K ExaFlops, has Amdahl's Law failed at Google?
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MevBreakRoom
· 05-27 03:05
TPU 8t this bandwidth density is a bit outrageous, what does 47 Pb/s mean?
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NonceNinja
· 05-27 02:59
From JAX scaling to millions of chips, is Pathways finally going to have its moment?
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MarginMoth
· 05-27 02:57
High-capacity switches sound expensive, but they save optical modules compared to three-layer Clos.
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0xPeachy
· 05-27 02:54
After reading, I just want to ask: when will I be able to get the trial quota for TPU v6?
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SushiLatency
· 05-27 02:54
Arm Axion CPU integrated, heterogeneous computing is getting more and more sophisticated.
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Semi-MeltedIceCream
· 05-27 02:53
VPU/MXU overlap balancing, achieving this level of fine-grained scheduling is indeed impressive
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QuietExitPlan
· 05-27 02:52
134k chips in one structure, how to divide the fault domain is a matter of expertise
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