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// RUN — FITS
Can the NVIDIA B200 run OPT-66B?
Yes — here's how fast and up to what context, with real measured numbers.
OPT-66B on the NVIDIA B200
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 132k | 44.2-52.7 t/s | ~0.2-0.3 (slow) |
| Q8 | yes | 333k | 88.5-105.5 t/s | ~0.4-0.5 (slow) |
| Q4 | yes | 422k | 158-188.3 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 B200 run OPT-66B?▶
Yes. At Q4 it generates ~158-188.3 tok/s and fits up to 422k 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 422k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.