Can I Run Qwen 3.5 4B on a AMD Ryzen AI Max+ 395 (64GB)?
Runs at full precision (f32). Zero quality loss.
12 quantizations fit your 48.0GB
| Quant | Min VRAM | Recommended | File size | Headroom |
|---|---|---|---|---|
| f32BEST | 19.8 GB | 21.3 GB | 1.3 GB | +28.2 GB |
| fp16 | 10.4 GB | 11.9 GB | 0.7 GB | +37.6 GB |
| Q8_0 | 6.0 GB | 7.5 GB | 4.5 GB | +42.0 GB |
| Q6_K | 4.9 GB | 6.4 GB | 3.5 GB | +43.1 GB |
| Q5_K_M | 4.3 GB | 5.8 GB | 3.1 GB | +43.7 GB |
| Q5_K_S | 4.2 GB | 5.7 GB | 3.0 GB | +43.8 GB |
| Q4_1 | 3.9 GB | 5.4 GB | 2.8 GB | +44.1 GB |
| Q4_K_M | 3.9 GB | 5.3 GB | 2.7 GB | +44.1 GB |
| Q4_K_S | 3.7 GB | 5.2 GB | 2.6 GB | +44.3 GB |
| Q4_0 | 3.6 GB | 5.1 GB | 2.6 GB | +44.4 GB |
| Q3_K_M | 3.0 GB | 4.5 GB | 2.3 GB | +45.0 GB |
| Q3_K_S | 2.8 GB | 4.3 GB | 2.1 GB | +45.2 GB |
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All quant variants, benchmark scores, and use-case tags.
Top-ranked open-source models that fit in 48.0GB.
FAQ
Can the AMD Ryzen AI Max+ 395 (64GB) run Qwen 3.5 4B?
Yes. The AMD Ryzen AI Max+ 395 (64GB)'s 48.0GB of unified memory is enough to run Qwen 3.5 4B at f32 quantization (19.8GB required).
What's the best quantization to use?
f32 is the highest-precision quantization that fits in your 48.0GB. It uses about 19.8GB of memory and 21.3GB recommended for comfortable inference.
What if I need more headroom for context length?
KV cache memory grows with context length. The numbers above assume a baseline 2K-4K context. For long-context use (32K+), add another 2-6GB depending on the model architecture.