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// RUN — FITS
Can the Apple M4 Max 128GB run ProtBERT-BFD?
Yes — here's how fast and up to what context, with real measured numbers.
ProtBERT-BFD on the Apple M4 Max 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 1722k | 442-533 t/s | ~8.1-9.8 (slow) |
| Q8 | yes | 1729k | 884-1066 t/s | ~16.2-19.5 (slow) |
| Q4 | yes | 1731k | 1578.6-1903.6 t/s | ~28.9-34.9 (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 M4 Max 128GB run ProtBERT-BFD?▶
Yes. At Q4 it generates ~1578.6-1903.6 tok/s and fits up to 1731k context; beyond that it spills to SSD swap and slows to ~28.9-34.9 tok/s.
How much context fits?▶
At Q4, up to about 1731k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.