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// RUN — FITS
Can the Apple M1 Ultra 128GB run Nemotron-H 56B?
Yes — here's how fast and up to what context, with real measured numbers.
Nemotron-H 56B on the Apple M1 Ultra 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 5k | 4.9-5.9 t/s | ~0.1-0.1 (slow) |
| Q8 | yes | 176k | 9.7-11.7 t/s | ~0.1-0.1 (slow) |
| Q4 | yes | 251k | 17.3-20.9 t/s | ~0.2-0.3 (slow) |
Estimate (memory-bound). Beyond "max context" the KV cache spills to SSD swap and speed drops to the "beyond" figure.
FAQ
Can the Apple M1 Ultra 128GB run Nemotron-H 56B?▶
Yes. At Q4 it generates ~17.3-20.9 tok/s and fits up to 251k context; beyond that it spills to SSD swap and slows to ~0.2-0.3 tok/s.
How much context fits?▶
At Q4, up to about 251k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.