Alcoft Q4_K_S 4B Parameters

VRAM Requirements for
Qwen_Qwen3-4B-GGUF Q4_K_S

To run Qwen_Qwen3-4B-GGUF locally at Q4_K_S quantization, you need at minimum 4.32 GB of GPU VRAM.

4.32 GB
Required VRAM
2.25 GB
File Size
8K tokens
Context Window
4B
Parameters
Estimated VRAM Required
4.32
GB
Consumer Friendly
0 16GB
RTX 3080 48GB
A6000 80GB+

Recommended GPU Configurations

Budget $299 – $349

RTX 4060 (8GB)

8 GB

Perfect entry-level GPU. Handles small quantised models with ease.

Balanced $549 – $599

RTX 4070 (12GB)

12 GB

Excellent performance-per-dollar for running sub-7B models at Q8.

Ultimate $1,599 – $1,999

RTX 4090 (24GB)

24 GB

Overkill for this size — plenty of headroom for bigger models.

📊 VRAM Calculation Breakdown

Model File Size (Q4_K_S) 2.25 GB
Context Overhead (8,192 tokens × 4B × 2 ÷ 1M) 0.066 GB
System Buffer (OS + CUDA runtime) 2.00 GB
Total Required VRAM 4.32 GB

Try a Different Quantization

Use the interactive calculator to compare Qwen_Qwen3-4B-GGUF across all available formats.

Open Live Calculator →

Qwen_Qwen3-4B-GGUF — Other Quantizations

Q2_K_L 1.25 GB file
3.32 GB
Q2_K_XL 1.25 GB file
3.32 GB
Q2_K 1.25 GB file
3.32 GB
Q3_K_L 1.75 GB file
3.82 GB
Q3_K_M 1.75 GB file
3.82 GB
Q3_K_S 1.75 GB file
3.82 GB
Q3_K_XL 1.75 GB file
3.82 GB
Q3_K_XXL 1.75 GB file
3.82 GB
Q4_K_S Current
4.32 GB
Q4_K_XL 2.25 GB file
4.32 GB
Q4_K_M 2.25 GB file
4.32 GB
Q4_K_L 2.25 GB file
4.32 GB
Q5_K_L 2.75 GB file
4.82 GB
Q5_K_M 2.75 GB file
4.82 GB
Q5_K_S 2.75 GB file
4.82 GB
Q5_K_XL 2.75 GB file
4.82 GB
Q6_K 3.25 GB file
5.32 GB
Q6_K_L 3.25 GB file
5.32 GB
Q6_K_XL 3.25 GB file
5.32 GB
Q8_0 4.25 GB file
6.32 GB
Q8_K_XL 4.25 GB file
6.32 GB
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Frequently Asked Questions

Can I run Qwen_Qwen3-4B-GGUF Q4_K_S on a consumer GPU?
Yes! At 4.32 GB VRAM required, a single high-end consumer GPU like the RTX 4090 (24GB) can handle this workload. You can also use multiple GPUs for tensor parallelism.
What happens if I don't have enough VRAM?
If your GPU VRAM is insufficient, llama.cpp and similar tools will offload model layers to system RAM (CPU inference). This is much slower — expect 10-50× the generation latency compared to full GPU inference.
Can I use multiple GPUs to run Qwen_Qwen3-4B-GGUF?
Yes! Tools like llama.cpp, vLLM, and Ollama support tensor parallelism across multiple GPUs. For example, 2× RTX 3090 (24GB each) gives you 48GB total VRAM, which can run many large models.
Is Q4_K_S quality good enough for production?
Q4_K_M is an excellent balance of quality and performance. Perplexity tests show minimal degradation (< 2%) vs FP16 for most models. Suitable for most production applications.