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// RUN — FITS
Can the Apple M1 Ultra 128GB run RMBG v2.0?
Yes — here's how fast and up to what context, with real measured numbers.
RMBG v2.0 on the Apple M1 Ultra 128GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 1728k | 1230.8-1484.2 t/s | ~15.4-18.6 (slow) |
| Q8 | yes | 1732k | 2461.5-2968.3 t/s | ~30.8-37.1 (slow) |
| Q4 | yes | 1733k | 4395.6-5300.6 t/s | ~54.9-66.3 (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 M1 Ultra 128GB run RMBG v2.0?▶
Yes. At Q4 it generates ~4395.6-5300.6 tok/s and fits up to 1733k context; beyond that it spills to SSD swap and slows to ~54.9-66.3 tok/s.
How much context fits?▶
At Q4, up to about 1733k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.