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Meta MTIA 450 vs NVIDIA Rubin CPX

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

MTIA 450: MTIA, 2027 Rubin CPX: Rubin, 2026
Memory
288 vs 128 GB
160 GB more for the MTIA 450
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Meta MTIA 450 vs NVIDIA Rubin CPX

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Meta MTIA 450

Full specs →

What is the Meta MTIA 450?

The MTIA 450 is an ASIC from Meta on the MTIA architecture, an accelerator built for AI workloads. It has been announced but is not yet shipping. MTIA 450 full specifications →

Can I rent the MTIA 450 in the cloud?

Flopper is not tracking any live rental listings for the MTIA 450 yet. The provider directory lists the clouds that rent comparable accelerators on demand. GPU cloud providers →

How does the MTIA 450 compare with other accelerators?

This page sets the MTIA 450 against the Rubin CPX. The MTIA 450 is the newer generation of the two. This is a cross-vendor matchup, Meta against NVIDIA. The compare tool builds the same comparison for any two parts in the catalogue. All GPU comparisons →

Where do the MTIA 450 figures come from?

Every MTIA 450 figure on this page traces to Meta's own datasheet or specification table. 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 MTIA 450. The Rubin CPX is the older generation of the two. This is a cross-vendor matchup, NVIDIA against Meta. 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

Meta logo
MTIA 450
Rubin CPX
Architecture
MTIARubin
Launch Year
20272026
Form Factor
——
Memory
288 GB128 GB
Memory Bandwidth
18.4 TB/s—
TDP
1.4 kW—
Process Node
——

Performance (TFLOPS)

Meta logo
MTIA 450
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
3,500 TFLOPS No verified data available
No verified data available No verified data available
7,000 TFLOPS No verified data available
FP6
No verified data available No verified data available
21,000 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

The MTIA 450 is the newer part: MTIA (2027) against the Rubin CPX's Rubin (2026).

The MTIA 450 carries 160 GB more memory (288 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 BF16, FP8, FP4, Sparsity and TFLOPS. For how the generations relate, see NVIDIA architectures explained.

Frequently asked questions

Which should you choose, the MTIA 450 or the Rubin CPX?

Choose the MTIA 450 when the model has to fit on one GPU: it carries 160 GB more memory.

Which has more memory, the MTIA 450 or the Rubin CPX?

The MTIA 450 carries 288 GB of memory versus 128 GB for the Rubin CPX.

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Open in Full Compare Tool → MTIA 450 full specs Rubin CPX full specs Estimate cluster cost in the calculator →

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