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Google TPU 8t vs NVIDIA Rubin CPX

Side-by-side specifications, performance, and rental pricing for datacenter AI workloads.

TPU 8t: TPU 8, 2026 Rubin CPX: Rubin, 2026
Memory
216 vs 128 GB
88 GB more for the TPU 8t
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Google TPU 8t vs NVIDIA Rubin CPX

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Google TPU 8t

Full specs →

What is the Google TPU 8t?

The TPU 8t is a TPU from Google on the TPU 8 architecture, an accelerator built for AI training and inference. It has been announced but is not yet shipping. TPU 8t full specifications →

Can I rent the TPU 8t in the cloud?

Flopper is not tracking any live rental listings for the TPU 8t yet. The provider directory lists the clouds that rent comparable accelerators on demand. GPU cloud providers →

How does the TPU 8t compare with other accelerators?

This page sets the TPU 8t against the Rubin CPX. Both parts launched in the same year. This is a cross-vendor matchup, Google against NVIDIA. The compare tool builds the same comparison for any two parts in the catalogue. All GPU comparisons →

Where do the TPU 8t figures come from?

Google published the TPU 8t figures in marketing material rather than a datasheet, and Flopper has no independent confirmation of them. How Flopper verifies specifications →

NVIDIA Rubin CPX

Full specs →

What is the NVIDIA Rubin CPX?

The Rubin CPX is a GPU from NVIDIA on the Rubin architecture, an accelerator for AI training, inference and high-performance computing. It has been announced but is not yet shipping. Rubin CPX full specifications →

Can I rent the Rubin CPX in the cloud?

Flopper is not tracking any live rental listings for the Rubin CPX yet. The provider directory lists the clouds that rent comparable accelerators on demand. GPU cloud providers →

How does the Rubin CPX compare with other accelerators?

This page sets the Rubin CPX against the TPU 8t. Both parts launched in the same year. This is a cross-vendor matchup, NVIDIA against Google. The compare tool builds the same comparison for any two parts in the catalogue. All GPU comparisons →

Where do the Rubin CPX figures come from?

NVIDIA published the Rubin CPX figures in marketing material rather than a datasheet, and Flopper has no independent confirmation of them. How Flopper verifies specifications →

Specifications

TPU 8t
Rubin CPX
Architecture
TPU 8Rubin
Launch Year
20262026
Form Factor
——
Memory
216 GB128 GB
Memory Bandwidth
6.5 TB/s—
TDP
——
Process Node
——

Performance (TFLOPS)

TPU 8t
Rubin CPX
No verified data available No verified data available
No verified data available No verified data available
No verified data available No verified data available
No verified data available No verified data available
No verified data available No verified data available
No verified data available No verified data available
FP6
No verified data available No verified data available
12,600 TFLOPS No verified data available
No verified data available No verified data available

Figures are dense. Where a vendor publishes a figure it sits under the dense one and never decides a winner. Hover any precision for its definition, or read the GPU glossary.

FLOPS by Precision

What actually differs

Both launched in 2026, the TPU 8t on TPU 8 and the Rubin CPX on Rubin.

The TPU 8t carries 88 GB more memory (216 GB against 128 GB), so larger models fit on one GPU before you shard.

Weight the FP8 and FP16 rows for LLM work and the FP64 row for HPC.

New to the terms? The glossary explains FP4, Sparsity and TFLOPS. For how the generations relate, see NVIDIA architectures explained.

Frequently asked questions

Which should you choose, the TPU 8t or the Rubin CPX?

Choose the TPU 8t when the model has to fit on one GPU: it carries 88 GB more memory.

Which has more memory, the TPU 8t or the Rubin CPX?

The TPU 8t carries 216 GB of memory versus 128 GB for the Rubin CPX.

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