RX 7900 XTX meets the minimum VRAM requirement for Q4 inference of Qwen/Qwen3-8B. Review the quantization breakdown below to see how higher precision settings impact VRAM and throughput.
RX 7900 XTX can run Qwen/Qwen3-8B with Q4 quantization. At approximately 158 tokens/second, you can expect Excellent speed - conversational response times under 1 second.
You have 20GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 4GB | 24GB | 158.32 tok/s | ✅ Fits comfortably |
| Q8 | 9GB | 24GB | 92.56 tok/s | ✅ Fits comfortably |
| FP16 | 17GB | 24GB | 54.78 tok/s | ✅ Fits comfortably |