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// RUN — FITS
Can the Apple M3 Max 64GB run ESM1-670M (UR50/S)?
Yes — here's how fast and up to what context, with real measured numbers.
ESM1-670M (UR50/S) on the Apple M3 Max 64GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 836k | 203.2-245.1 t/s | ~5.1-6.1 (slow) |
| Q8 | yes | 846k | 406.5-490.1 t/s | ~10.2-12.3 (slow) |
| Q4 | yes | 850k | 725.8-875.2 t/s | ~18.1-21.9 (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 M3 Max 64GB run ESM1-670M (UR50/S)?▶
Yes. At Q4 it generates ~725.8-875.2 tok/s and fits up to 850k context; beyond that it spills to SSD swap and slows to ~18.1-21.9 tok/s.
How much context fits?▶
At Q4, up to about 850k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.