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// RUN — FITS
Can the Instinct MI440X run Llama 3.1-405B?
Yes — here's how fast and up to what context, with real measured numbers.
Llama 3.1-405B on the Instinct MI440X
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | no | — | — | — |
| Q8 | no | — | — | — |
| Q4 | yes | 323k | 54.4-66.5 t/s | ~0.1-0.1 (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 MI440X run Llama 3.1-405B?▶
Yes. At Q4 it generates ~54.4-66.5 tok/s and fits up to 323k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~0.1-0.1 tok/s.
How much context fits?▶
At Q4, up to about 323k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.