---
title: "Nvidia reportedly tests cheaper, lower-memory Rubin Ultra configs"
url: https://www.parallelquant.com/posts/nvidia-reportedly-tests-cheaper-lower-memory-rubin-ultra-configs-f1e1ac
source_name: "Tom's Hardware"
source_url: https://www.tomshardware.com/pc-components/gpus/nvidia-reportedly-testing-lower-memory-configs-of-rubin-ultra-as-memory-shortage-bites-back-designs-tested-include-as-little-as-192-gb-and-step-back-to-hbm4
published: 2026-08-10T16:47:00.000Z
topics: ["chips", "products"]
publisher: "Parallel Quant"
---

# Nvidia reportedly tests cheaper, lower-memory Rubin Ultra configs

*2026-08-10 · Source: [Tom's Hardware](https://www.tomshardware.com/pc-components/gpus/nvidia-reportedly-testing-lower-memory-configs-of-rubin-ultra-as-memory-shortage-bites-back-designs-tested-include-as-little-as-192-gb-and-step-back-to-hbm4)*

Nvidia is reportedly testing at least three Rubin Ultra configurations with as little as 192GB of memory, well below the 1TB of HBM4E (fourth-generation high-bandwidth memory) originally announced. The change reportedly comes as HBM supply tightens industry-wide.

**Why it matters:** If confirmed, this is a direct sign that the AI hardware buildout is now running into memory supply constraints, not just GPU compute limits. Lower-memory variants could mean higher effective costs or reduced model-serving capacity for buyers expecting the original 1TB spec, adding to the compute-versus-memory bottleneck concerns that have shadowed this GPU generation.

**Topics:** chips, products

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Read the original: https://www.tomshardware.com/pc-components/gpus/nvidia-reportedly-testing-lower-memory-configs-of-rubin-ultra-as-memory-shortage-bites-back-designs-tested-include-as-little-as-192-gb-and-step-back-to-hbm4
Canonical: https://www.parallelquant.com/posts/nvidia-reportedly-tests-cheaper-lower-memory-rubin-ultra-configs-f1e1ac
Published by Parallel Quant — https://www.parallelquant.com