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// RUN — FITS
Can the Apple M2 Ultra 64GB run Retrieval-Augmented Generator?
Yes — here's how fast and up to what context, with real measured numbers.
Retrieval-Augmented Generator on the Apple M2 Ultra 64GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 837k | 434.5-524 t/s | ~5.4-6.5 (slow) |
| Q8 | yes | 846k | 869-1047.9 t/s | ~10.9-13.1 (slow) |
| Q4 | yes | 851k | 1551.8-1871.3 t/s | ~19.4-23.4 (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 M2 Ultra 64GB run Retrieval-Augmented Generator?▶
Yes. At Q4 it generates ~1551.8-1871.3 tok/s and fits up to 851k context; beyond that it spills to SSD swap and slows to ~19.4-23.4 tok/s.
How much context fits?▶
At Q4, up to about 851k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.