How much VRAM does Qwen3 30B-A3B need?

At Q4_K_M with 8K context: 18.7GB weights + 0.8GB KV cache + 1.5GB runtime overhead = 21.0GB total. RTX 3060 12GB offers 12.0GB usable VRAM, so the verdict is: Not feasible.

What is the best quantization for Qwen3 30B-A3B on RTX 3060 12GB?

None — even Q2_K (14.4GB) exceeds this GPU's 12.0GB usable VRAM. Use a smaller model, multiple GPUs, or a cloud GPU.

Can RTX 3060 12GB run Qwen3 30B-A3B?

❌ Not feasible

Qwen3 30B-A3B @ Q4_K_M · 8K context

Needed

21.0 GB

Usable

12.0 GB

VRAM breakdown

Weights (Q4_K_M)	18.7 GB
KV cache (8K context)	0.8 GB
Runtime overhead	1.5 GB
Total	21.0 GB

Computed at 8K context with fp16 KV cache. Longer contexts need more VRAM — use the VRAM calculator for other settings.

Recommended quantization

Does not fit at any quantization

2× RTX 3060 12GB gives 24.0GB usable combined — enough to run it (Tight fit).

Smaller models this GPU runs well

Qwen3 8B
Llama 3.1 8B

FAQ

How much VRAM does Qwen3 30B-A3B need?: At Q4_K_M with 8K context: 18.7GB weights + 0.8GB KV cache + 1.5GB runtime overhead = 21.0GB total. RTX 3060 12GB offers 12.0GB usable VRAM, so the verdict is: Not feasible.
What is the best quantization for Qwen3 30B-A3B on RTX 3060 12GB?: None — even Q2_K (14.4GB) exceeds this GPU's 12.0GB usable VRAM. Use a smaller model, multiple GPUs, or a cloud GPU.

Check another combination in the GPU Checker →

Data verified 2026-08-04