Qwen3.6 35B-A3B VRAM requirements
Qwen3.6 35B-A3B has 36.0B parameters, of which about 3B are used per token; all 256 experts still have to be in memory. With an 8K-token context and one request it needs about 23.0 GB of GPU memory at Q4_K_M, 37.5 GB at FP8 and 74.3 GB at FP16/BF16. The published weights take 67.0 GB (BF16). On one 24 GB RTX 3090 / 4090 it runs at Q4_K_M with up to 56K tokens of context.
Open Qwen3.6 35B-A3B in the calculator
VRAM by quantization
Weights plus the KV cache for 8,192 tokens in FP16 and the runtime overhead (0.5 GB plus 10%). Each row opens the calculator with that setting. What the GGUF names mean.
| Precision | Weights | Total | Smallest setup |
|---|---|---|---|
| As published (BF16) | 67.0 GB | 74.3 GB | A100 / H100 80GB |
| FP16 / BF16 | 67.0 GB | 74.3 GB | A100 / H100 80GB |
| FP8 / INT8 | 33.5 GB | 37.5 GB | A100 40GB |
| INT4 (AWQ / GPTQ) | 17.8 GB | 20.2 GB | RTX 3090 / 4090 |
| GGUF Q8_0 | 35.6 GB | 39.8 GB | A100 40GB |
| GGUF Q6_K | 27.5 GB | 30.9 GB | RTX 5090 |
| GGUF Q5_K_M | 23.7 GB | 26.8 GB | RTX 5090 |
| GGUF Q4_K_M | 20.3 GB | 23.0 GB | RTX 3090 / 4090 |
| GGUF Q3_K_M | 16.4 GB | 18.7 GB | RTX 3090 / 4090 |
| GGUF Q2_K | 14.0 GB | 16.1 GB | RTX 3090 / 4090 |
KV cache at long context
10 of its 40 layers use full attention and 30 are linear-attention layers with no growing cache. Each extra token of context adds 20 KB of FP16 cache per request. How the KV cache works.
| Context | KV cache, FP16 | KV cache, FP8 | Total at Q4_K_M |
|---|---|---|---|
| 4K tokens | 80 MB | 40 MB | 22.9 GB |
| 32K tokens | 640 MB | 320 MB | 23.5 GB |
| 128K tokens | 2.50 GB | 1.25 GB | 25.5 GB |
| 256K tokens | 5.00 GB | 2.50 GB | 28.3 GB |
Which GPUs can run Qwen3.6 35B-A3B
With 8,192 tokens of context. Several GPUs means one tensor-parallel group of 2, 4 or 8 cards.
| GPU | Memory | Q4_K_M | FP8 |
|---|---|---|---|
| RTX 3060 | 12 GB | Needs 2 | Needs 4 |
| RTX 4060 Ti 16GB | 16 GB | Needs 2 | Needs 4 |
| RTX 3090 / 4090 | 24 GB | Fits on one | Needs 2 |
| RTX 5090 | 32 GB | Fits on one | Needs 2 |
| A100 40GB | 40 GB | Fits on one | Fits on one |
| Mac, 64 GB unified memory about 75% of it is usable by the GPU by default | 48 GB | Fits on one | Fits on one |
| L40S / RTX 6000 Ada | 48 GB | Fits on one | Fits on one |
| A100 / H100 80GB | 80 GB | Fits on one | Fits on one |
| Mac, 128 GB unified memory about 75% of it is usable by the GPU by default | 96 GB | Fits on one | Fits on one |
| H200 | 141 GB | Fits on one | Fits on one |
| B200 | 180 GB | Fits on one | Fits on one |
How fast Qwen3.6 35B-A3B writes
Tokens per second for one request with 8,192 tokens of context, estimated from memory bandwidth and the parameters read per token. A dash means it does not fit on one card. Try other settings in the speed calculator.
| Hardware | Bandwidth | Q4_K_M | FP8 |
|---|---|---|---|
| RTX 3060 12GB | 360 GB/s | — | — |
| RTX 4090 | 1,008 GB/s | 124–226 | — |
| RTX 5090 | 1,792 GB/s | 193–369 | — |
| M4 Max Mac (128 GB) | 546 GB/s | 74–129 | 48–83 |
| M3 Ultra Mac Studio (512 GB) | 819 GB/s | 104–187 | 69–121 |
| H100 SXM | 3,350 GB/s | 288–594 | 215–418 |
| H200 | 4,800 GB/s | 348–754 | 270–549 |
Longest context on one GPU
How many tokens of context fit on a single card with one request and an FP16 KV cache. "Full" means the model's whole context window fits.
| GPU | Memory | Q4_K_M | Q8_0 | FP8 |
|---|---|---|---|---|
| RTX 3060 | 12 GB | No | No | No |
| RTX 4060 Ti 16GB | 16 GB | No | No | No |
| RTX 3090 / 4090 | 24 GB | 56K | No | No |
| RTX 5090 | 32 GB | 256K (full) | No | No |
| A100 40GB | 40 GB | 256K (full) | 16K | 124K |
| Mac, 64 GB unified memory | 48 GB | 256K (full) | 256K (full) | 256K (full) |
| L40S / RTX 6000 Ada | 48 GB | 256K (full) | 256K (full) | 256K (full) |
| A100 / H100 80GB | 80 GB | 256K (full) | 256K (full) | 256K (full) |
| Mac, 128 GB unified memory | 96 GB | 256K (full) | 256K (full) | 256K (full) |
| H200 | 141 GB | 256K (full) | 256K (full) | 256K (full) |
| B200 | 180 GB | 256K (full) | 256K (full) | 256K (full) |
Model details
- Parameters
- 36.0B (35,951,822,704)
- Experts
- 256 routed experts, all loaded
- Active per token
- 3B
- Layers
- 10 of its 40 layers use full attention and 30 are linear-attention layers with no growing cache
- Attention cache
- 2 KV heads × 256
- Context length
- 262,144 tokens
- Published weights
- 67.0 GB (BF16)
- On Hugging Face
- Qwen/Qwen3.6-35B-A3B
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Numbers read from the model files on Hugging Face on .