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// RUN — FITS
Can the Apple M2 Ultra 192GB run HiFi - NN?
Yes — here's how fast and up to what context, with real measured numbers.
HiFi - NN on the Apple M2 Ultra 192GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 2614k | 90666.7-109333.3 t/s | ~1133.3-1366.7 (slow) |
| Q8 | yes | 2614k | 181333.3-218666.7 t/s | ~2266.7-2733.3 (slow) |
| Q4 | yes | 2614k | 323809.5-390476.2 t/s | ~4047.6-4881 (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 HiFi - NN?▶
Yes. At Q4 it generates ~323809.5-390476.2 tok/s and fits up to 2614k context; beyond that it spills to SSD swap and slows to ~4047.6-4881 tok/s.
How much context fits?▶
At Q4, up to about 2614k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.