RTX 3090 meets the minimum VRAM requirement for Q4 inference of Qwen Qwen3 4B Base. Review the quantization breakdown below to see how higher precision settings impact VRAM and throughput.
RTX 3090 can run Qwen Qwen3 4B Base with Q4 quantization. At approximately 154 tokens/second, you can expect Excellent speed - conversational response times under 1 second.
You have 22GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 2GB | 24GB | 154.19 tok/s | ✅ Fits comfortably |
| Q8 | 4GB | 24GB | 107.93 tok/s | ✅ Fits comfortably |
| FP16 | 8GB | 24GB | 58.59 tok/s | ✅ Fits comfortably |