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Can the Instinct MI455X run Gemma 3 270M?
Yes — here's how fast and up to what context, with real measured numbers.
Gemma 3 270M on the Instinct MI455X
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 6033k | 22866.7-27948.1 t/s | ~46.7-57 (slow) |
| Q8 | yes | 6037k | 45733.3-55896.3 t/s | ~93.3-114.1 (slow) |
| Q4 | yes | 6039k | 81666.7-99814.8 t/s | ~166.7-203.7 (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 Gemma 3 270M?▶
Yes. At Q4 it generates ~81666.7-99814.8 tok/s and fits up to 6039k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~166.7-203.7 tok/s.
How much context fits?▶
At Q4, up to about 6039k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.