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README.md
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# ๐ First INT4 Quantized Cube3D - Run on Half the VRAM
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Presenting the **first INT4 quantized version** of [Cube3D v0.5](https://huggingface.co/Roblox/cube3d-v0.5), a text-to-3D mesh generative model. Quantized via **RTN W4A16** (group_size=128) using [torchao](https://github.com/pytorch/ao), it cuts peak VRAM from **25.4 GB โ 14.3 GB (44%โ)** while maintaining the same inference speed and comparable shape fidelity - enabling 3D shape generation on much smaller, more accessible GPUs.
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| | BF16 + Engine | BF16 + EngineFast | **INT4 + EngineFast** |
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| ๐ฎ Peak VRAM | 21.7 GB | 25.4 GB | **
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| ๐ฆ Setup time | 19.4 s | 206.9 s | **
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| โฑ๏ธ Latency | 90.9 s | 15.0 s | **14.2 s** |
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<mark>๐ก The
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</mark>
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### Original BF16 vs Quantized INT4 Comparisons:
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# ๐ First INT4 Quantized Cube3D - Run on Half the VRAM
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Presenting the **first INT4 quantized version** of [Cube3D v0.5](https://huggingface.co/Roblox/cube3d-v0.5), a text-to-3D mesh generative model. Quantized via **RTN W4A16** (group_size=128) using [torchao](https://github.com/pytorch/ao), it cuts peak VRAM from **25.4 GB โ 14.3 GB (44%โ)** while maintaining the same inference speed and comparable shape fidelity - enabling 3D shape generation on much smaller, more accessible GPUs.
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| | BF16 + Engine | BF16 + EngineFast | **INT4 + EngineFast** |
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|---|:-:|:-:|:-:|
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| ๐ฎ Peak VRAM | 21.7 GB | 25.4 GB | **11.3 GB (55%โ)** โจ |
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| ๐ฆ Setup time | 19.4 s | 206.9 s | **6.9 s (97%โ)** |
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| โฑ๏ธ Latency | 90.9 s | 15.0 s | **14.2 s** |
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<mark>๐ก The 55% VRAM reduction means this model now fits on a single 15 GB GPU (e.g. NVIDIA L4, A10, A2 etc.), bringing high-quality text-to-3D generation to individual researchers and end-user hardware.
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</mark>
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### Original BF16 vs Quantized INT4 Comparisons:
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