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// RUN — FITS
Can the Instinct MI455X run GPT-Neo-125M?
Yes — here's how fast and up to what context, with real measured numbers.
GPT-Neo-125M on the Instinct MI455X
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 6038k | 49392-60368 t/s | ~100.8-123.2 (slow) |
| Q8 | yes | 6040k | 98784-120736 t/s | ~201.6-246.4 (slow) |
| Q4 | yes | 6040k | 176400-215600 t/s | ~360-440 (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 GPT-Neo-125M?▶
Yes. At Q4 it generates ~176400-215600 tok/s and fits up to 6040k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~360-440 tok/s.
How much context fits?▶
At Q4, up to about 6040k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.