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// RUN — FITS
Can the Instinct MI455X run phi-3-mini 3.8B?
Yes — here's how fast and up to what context, with real measured numbers.
phi-3-mini 3.8B on the Instinct MI455X
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 5926k | 1624.7-1985.8 t/s | ~3.3-4.1 (slow) |
| Q8 | yes | 5984k | 3249.5-3971.6 t/s | ~6.6-8.1 (slow) |
| Q4 | yes | 6009k | 5802.6-7092.1 t/s | ~11.8-14.5 (slow) |
Estimate (memory-bound). Beyond "max context" the KV cache spills to system RAM offload (depends on your system RAM) and speed drops to the "beyond" figure.
FAQ
Can the Instinct MI455X run phi-3-mini 3.8B?▶
Yes. At Q4 it generates ~5802.6-7092.1 tok/s and fits up to 6009k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~11.8-14.5 tok/s.
How much context fits?▶
At Q4, up to about 6009k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.