RX 6800 XT meets the minimum VRAM requirement for Q4 inference of microsoft/Phi-4-multimodal-instruct. Review the quantization breakdown below to see how higher precision settings impact VRAM and throughput.
RX 6800 XT can run microsoft/Phi-4-multimodal-instruct with Q4 quantization. At approximately 78 tokens/second, you can expect Good speed - acceptable for interactive use.
You have 12GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 4GB | 16GB | 77.68 tok/s | ✅ Fits comfortably |
| Q8 | 7GB | 16GB | 53.44 tok/s | ✅ Fits comfortably |
| FP16 | 15GB | 16GB | 32.52 tok/s | ⚠️ Tight fit |