RTX 4080 meets the minimum VRAM requirement for Q4 inference of openai/gpt-oss-20b. Review the quantization breakdown below to see how higher precision settings impact VRAM and throughput.
RTX 4080 can run openai/gpt-oss-20b with Q4 quantization. At approximately 72 tokens/second, you can expect Good speed - acceptable for interactive use.
You have 6GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 10GB | 16GB | 72.24 tok/s | ✅ Fits comfortably |
| Q8 | 20GB | 16GB | 47.91 tok/s | ❌ Not recommended |
| FP16 | 41GB | 16GB | 25.97 tok/s | ❌ Not recommended |