Microsoft Phi 4 Multimodal Instruct speed on RX 6800 XT and quantization-level VRAM fit.
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 81 tokens/second, you can expect Good speed - acceptable for interactive use.
You have 14GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 2GB | 16GB | 81.23 tok/s | ✅ Fits comfortably |
| Q8 | 4GB | 16GB | 56.86 tok/s | ✅ Fits comfortably |
| FP16 | 8GB | 16GB | 30.87 tok/s | ✅ Fits comfortably |
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RX 6800 XT can run Microsoft Phi 4 Multimodal Instruct at Q4 with an estimated 81 tok/s.
Q4 inference is estimated to need about 2GB VRAM on this page, while RX 6800 XT has 16GB available.
If you need more speed or context headroom, compare alternative GPUs below and check higher-tier VRAM options.