Can I Run Qwen 3 Next 80B A3B on a Apple M5 Ultra (512GB)?
Runs at Q8_0 — near-lossless quality.
13 quantizations fit your 512GB
| Quant | Min VRAM | Recommended | File size | Headroom |
|---|---|---|---|---|
| Q8_0BEST | 86.0 GB | 87.5 GB | 84.8 GB | +426.0 GB |
| Q6_K | 66.9 GB | 68.4 GB | 65.5 GB | +445.1 GB |
| Q5_K_M | 57.8 GB | 59.3 GB | 56.7 GB | +454.2 GB |
| Q5_K_S | 56.2 GB | 57.7 GB | 55.0 GB | +455.8 GB |
| Q5_0 | 56.0 GB | 57.5 GB | 55.0 GB | +456.0 GB |
| Q4_1 | 51.0 GB | 52.5 GB | 50.0 GB | +461.0 GB |
| Q4_K_M | 49.5 GB | 51.0 GB | 48.7 GB | +462.5 GB |
| Q4_K_S | 46.8 GB | 48.3 GB | 46.9 GB | +465.2 GB |
| Q4_0 | 46.0 GB | 47.5 GB | 46.1 GB | +466.0 GB |
| Q3_K_L | 36.6 GB | 38.1 GB | 38.2 GB | +475.4 GB |
| Q3_K_M | 34.5 GB | 36.0 GB | 36.7 GB | +477.5 GB |
| Q3_K_S | 31.8 GB | 33.3 GB | 34.9 GB | +480.2 GB |
| Q2_K | 27.3 GB | 28.8 GB | 28.2 GB | +484.7 GB |
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Top-ranked open-source models that fit in 512GB.
FAQ
Can the Apple M5 Ultra (512GB) run Qwen 3 Next 80B A3B?
Yes. The Apple M5 Ultra (512GB)'s 512GB of unified memory is enough to run Qwen 3 Next 80B A3B at Q8_0 quantization (86.0GB required).
What's the best quantization to use?
Q8_0 is the highest-precision quantization that fits in your 512GB. It uses about 86.0GB of memory and 87.5GB recommended for comfortable inference.
What if I need more headroom for context length?
KV cache memory grows with context length. The numbers above assume a baseline 2K-4K context. For long-context use (32K+), add another 2-6GB depending on the model architecture.