Can I Run Mistral Medium 3.5 128B on a Apple M3 Ultra (512GB)?
Runs at full precision (f32). Zero quality loss.
6 quantizations fit your 512GB
| Quant | Min VRAM | Recommended | File size | Headroom |
|---|---|---|---|---|
| f32BEST | 511.8 GB | 513.3 GB | 10.7 GB | +0.2 GB |
| fp16 | 256.4 GB | 257.9 GB | 5.4 GB | +255.6 GB |
| Q6_K | 106.2 GB | 107.7 GB | 102.6 GB | +405.8 GB |
| Q5_K_M | 91.7 GB | 93.2 GB | 88.3 GB | +420.3 GB |
| Q4_K_M | 78.4 GB | 79.9 GB | 74.9 GB | +433.6 GB |
| Q2_K | 43.0 GB | 44.5 GB | 46.6 GB | +469.0 GB |
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FAQ
Can the Apple M3 Ultra (512GB) run Mistral Medium 3.5 128B?
Yes. The Apple M3 Ultra (512GB)'s 512GB of unified memory is enough to run Mistral Medium 3.5 128B at f32 quantization (511.8GB required).
What's the best quantization to use?
f32 is the highest-precision quantization that fits in your 512GB. It uses about 511.8GB of memory and 513.3GB 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.