RTX 5090 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 5090 can run Qwen/Qwen3-4B-Base with Q4 quantization. At approximately 274 tokens/second, you can expect Excellent speed - conversational response times under 1 second.
You have 30GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 2GB | 32GB | 273.79 tok/s | ✅ Fits comfortably |
| Q8 | 4GB | 32GB | 221.72 tok/s | ✅ Fits comfortably |
| FP16 | 9GB | 32GB | 120.36 tok/s | ✅ Fits comfortably |