Qwen models are a suite of state-of-the-art generative AI models for tasks such as natural language processing (NLP), audio transcription, video analysis, and even domain-specific use cases like mathematical reasoning. They offer a range of configurations, from lightweight models with a few hundred million parameters to ultra-large models exceeding 70 billion parameters.

These models utilize FP16 (half-precision floating point) for full inference but can also run in 8-bit or 4-bit quantized modes to reduce memory consumption. Quantization lowers the VRAM requirements but may affect model accuracy and inference speed, depending on your workload and application.

This guide provides an overview of GPU memory requirements for full and quantized versions of the Qwen models and offers GPU recommendations for each configuration.

Understanding GPU Memory Requirements

When running AI models, the key limiting factor is VRAM, which holds both the model weights and intermediate computations. Larger models demand more VRAM, which can only be met by high-end GPUs. However, quantized models significantly reduce VRAM needs, enabling efficient inference on consumer-grade GPUs.

Here's a breakdown of the three inference modes:

Full Precision (FP16): Highest VRAM requirement but optimal for accuracy and speed.
8-bit Quantization: Cuts VRAM usage by about 40-50% with a minor performance trade-off.
4-bit Quantization: Further reduces VRAM by up to 70% but may impact model precision.

Other variants exist, such as 5-bit quantization. However, I will list the common ones (4-bit & 8-bit), and you can choose other precisions to optimize your hardware usage further.

Full-Precision (FP16) Models

This table shows the VRAM needed for full-precision inference and recommends GPUs.

Model	Parameters (B)	VRAM Required (GB)	Recommended GPU(s)
Qwen	1.8	4.14	RTX 3060 (12GB)
Qwen	7	16.1	RTX 4090 (24GB)
Qwen	14	32.2	RTX 4090 (24GB) x2
Qwen	72	165.6	RTX 6000 Ada (48GB) x4
Qwen1.5	0.5	1.15	GTX 1660 Ti (6GB)
Qwen1.5	4	9.2	RTX 3080 (10GB)
Qwen1.5	72	165.6	RTX 6000 Ada (48GB) x4
Qwen2	7	16.1	RTX 4090 (24GB)
Qwen2	57	131.1	RTX 6000 Ada (48GB) x4
Qwen2.5	0.5	1.15	GTX 1660 Ti (6GB)
Qwen2.5	7	16.1	RTX 4090 (24GB)
Qwen-Audio	7	16.8	RTX 4090 (24GB)
Qwen2-VL	72	194.4	RTX 6000 Ada (48GB) x4
CodeQwen1.5	72	180	RTX 6000 Ada (48GB) x4
QwQ	32	80.0	RTX 4090 (24GB) x4

Quantized Models

Quantized models are much more efficient, enabling deployment on GPUs with limited VRAM. Below are the recommendations for 8-bit and 4-bit quantization.

8-bit Quantized Models

Model	Parameters (B)	VRAM Required (GB)	Recommended GPU(s)
Qwen	1.8	4.76	RTX 3060 (12GB)
Qwen	7	18.52	RTX 4080 (16GB)
Qwen	14	37.03	RTX 4090 (24GB) x2
Qwen1.5	4	10.58	RTX 4070 Ti (12GB)
Qwen1.5	72	190.44	RTX 6000 Ada (48GB) x4
Qwen2	7	18.52	RTX 4080 (16GB)
Qwen2	57	150.77	RTX 6000 Ada (48GB) x4
CodeQwen1.5	72	207.0	RTX 6000 Ada (48GB) x4
QwQ	32	40.0	RTX 4090 (24GB) x2

4-bit Quantized Models

Model	Parameters (Billion)	VRAM Required (GB)	Recommended GPU(s)
Qwen	1.8	2.74	RTX 3050 (8GB)
Qwen	7	10.65	RTX 4070 Ti (12GB)
Qwen	14	21.29	RTX 4090 (24GB)
Qwen1.5	4	6.08	RTX 3060 Ti (8GB)
Qwen1.5	72	109.50	RTX 4090 (24GB) x4
Qwen2	7	10.65	RTX 4070 Ti (12GB)
CodeQwen1.5	72	119.03	RTX 4090 (24GB) x4
QwQ	32	20.0	RTX 4090 (24GB)

GPU Selection Tips

Here are a few suggestions to help you select the right GPU setup for your use case:

Consumer GPUs like the RTX 4090 can run models with up to 24 GB of VRAM (36GB with the new RTX 5090). For models exceeding this limit, consider using multi-GPU setups or enterprise GPUs such as the RTX 6000 Ada with 48 GB of VRAM.
For applications where high precision is not critical, using 8-bit or 4-bit quantized models can dramatically reduce VRAM requirements. This allows smaller models to run on mid-tier GPUs like the RTX 3060 or RTX 4070.
For very large models, multi-GPU setups with NVLink or similar interconnects may be necessary to ensure efficient communication between GPUs.
If you're prototyping, begin with smaller models and lower precision to assess hardware needs before scaling up.

Conclusion

Qwen models provide immense versatility but demand substantial GPU resources for optimal performance. This guide covered the VRAM requirements for both full-precision and quantized versions of various Qwen models, alongside recommended GPUs for each scenario. By choosing the right hardware and configuration for your specific use case, even on consumer-grade GPUs, you can achieve efficient and scalable AI deployments.

GPU System Requirements Guide for Qwen LLM Models (All Variants)