Microsoft Vibevoice 1.5B speed on RTX 4090 and quantization-level VRAM fit.
RTX 4090 meets the minimum VRAM requirement for Q4 inference of Microsoft Vibevoice 1.5B. Review the quantization breakdown below to see how higher precision settings impact VRAM and throughput.
RTX 4090 can run Microsoft Vibevoice 1.5B with Q4 quantization. At approximately 216 tokens/second, you can expect Excellent speed - conversational response times under 1 second.
You have 23GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 1GB | 24GB | 216.00 tok/s | ✅ Fits comfortably |
| Q8 | 2GB | 24GB | 151.20 tok/s | ✅ Fits comfortably |
| FP16 | 3GB | 24GB | 82.08 tok/s | ✅ Fits comfortably |
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RTX 4090 can run Microsoft Vibevoice 1.5B at Q4 with an estimated 216 tok/s.
Q4 inference is estimated to need about 1GB 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.