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// RUN — FITS
Can the Instinct MI455X run LFM2.5-ColBERT-350M?
Yes — here's how fast and up to what context, with real measured numbers.
LFM2.5-ColBERT-350M on the Instinct MI455X
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 6031k | 17640-21560 t/s | ~36-44 (slow) |
| Q8 | yes | 6036k | 35280-43120 t/s | ~72-88 (slow) |
| Q4 | yes | 6039k | 63000-77000 t/s | ~128.6-157.1 (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 MI455X run LFM2.5-ColBERT-350M?▶
Yes. At Q4 it generates ~63000-77000 tok/s and fits up to 6039k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~128.6-157.1 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.