Microsoft Phi 3 Medium 128K Instruct speed on RTX 4090 and quantization-level VRAM fit.
RTX 4090 meets the minimum VRAM requirement for Q4 inference of Microsoft Phi 3 Medium 128K Instruct. Review the quantization breakdown below to see how higher precision settings impact VRAM and throughput.
RTX 4090 can run Microsoft Phi 3 Medium 128K Instruct with Q4 quantization. At approximately 180 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 | 180.00 tok/s | ✅ Fits comfortably |
| Q8 | 8GB | 24GB | 126.00 tok/s | ✅ Fits comfortably |
| FP16 | 16GB | 24GB | 68.40 tok/s | ✅ Fits comfortably |
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Compare prebuilt systems →RTX 4090 can run Microsoft Phi 3 Medium 128K Instruct at Q4 with an estimated 180 tok/s.
Q4 inference is estimated to need about 4GB VRAM on this page, while RTX 4090 has 24GB available.
If you need more speed or context headroom, compare alternative GPUs below and check higher-tier VRAM options.