How much VRAM does Gemma 3 27B need?

At Q4_K_M with 8K context: 16.8GB weights + 4.2GB KV cache + 1.5GB runtime overhead = 22.4GB total. RTX 4070 Ti Super offers 16.0GB usable VRAM, so the verdict is: Not feasible.

What is the best quantization for Gemma 3 27B on RTX 4070 Ti Super?

None — even Q2_K (16.5GB) exceeds this GPU's 16.0GB usable VRAM. Use a smaller model, multiple GPUs, or a cloud GPU.

Can RTX 4070 Ti Super run Gemma 3 27B?

❌ Not feasible

Gemma 3 27B @ Q4_K_M · 8K context

Needed

22.4 GB

Usable

16.0 GB

VRAM breakdown

Weights (Q4_K_M)	16.8 GB
KV cache (8K context)	4.2 GB
Runtime overhead	1.5 GB
Total	22.4 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 4070 Ti Super gives 32.0GB usable combined — enough to run it (Comfortable).

Smaller models this GPU runs well

Phi-4 14B
Qwen3 8B

FAQ

How much VRAM does Gemma 3 27B need?: At Q4_K_M with 8K context: 16.8GB weights + 4.2GB KV cache + 1.5GB runtime overhead = 22.4GB total. RTX 4070 Ti Super offers 16.0GB usable VRAM, so the verdict is: Not feasible.
What is the best quantization for Gemma 3 27B on RTX 4070 Ti Super?: None — even Q2_K (16.5GB) exceeds this GPU's 16.0GB usable VRAM. Use a smaller model, multiple GPUs, or a cloud GPU.

Check another combination in the GPU Checker →

Data verified 2026-08-04