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// RUN — FITS
Can the NVIDIA L40S 48GB run OPT-66B?
Yes — here's how fast and up to what context, with real measured numbers.
OPT-66B on the NVIDIA L40S 48GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | no | — | — | — |
| Q8 | no | — | — | — |
| Q4 | yes | 17k | 17.1-20.3 t/s | ~0.8-0.9 (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 NVIDIA L40S 48GB run OPT-66B?▶
Yes. At Q4 it generates ~17.1-20.3 tok/s and fits up to 17k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~0.8-0.9 tok/s.
How much context fits?▶
At Q4, up to about 17k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.