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// RUN — FITS
Can the Apple M2 Ultra 192GB run TxGemma 27B?
Yes — here's how fast and up to what context, with real measured numbers.
TxGemma 27B on the Apple M2 Ultra 192GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 447k | 10.1-12.1 t/s | ~0.1-0.2 (slow) |
| Q8 | yes | 550k | 20.1-24.3 t/s | ~0.3-0.3 (slow) |
| Q4 | yes | 596k | 36-43.4 t/s | ~0.4-0.5 (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 192GB run TxGemma 27B?▶
Yes. At Q4 it generates ~36-43.4 tok/s and fits up to 596k context; beyond that it spills to SSD swap and slows to ~0.4-0.5 tok/s.
How much context fits?▶
At Q4, up to about 596k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.