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// RUN — FITS
Can the Apple M1 Ultra 64GB run IDEFICS-9B?
Yes — here's how fast and up to what context, with real measured numbers.
IDEFICS-9B on the Apple M1 Ultra 64GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 291k | 30.2-36.4 t/s | ~0.4-0.5 (slow) |
| Q8 | yes | 359k | 60.4-72.9 t/s | ~0.8-0.9 (slow) |
| Q4 | yes | 390k | 107.9-130.2 t/s | ~1.3-1.6 (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 64GB run IDEFICS-9B?▶
Yes. At Q4 it generates ~107.9-130.2 tok/s and fits up to 390k context; beyond that it spills to SSD swap and slows to ~1.3-1.6 tok/s.
How much context fits?▶
At Q4, up to about 390k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.