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text model · Granite · Windows

Can I run Granite 4.1 30B on Nvidia GeForce RTX 4080 (16GB)?

Compatibility verdict VRAM threshold engine
No, not enough memory would not load

No. Granite 4.1 30B needs ~19.1 GB even at Q4_K_M, but Nvidia GeForce RTX 4080 (16GB) only has ~15 GB usable.

Needs ~19.1 GB Device usable ~15 GB

Needs ~19.1 GB even at Q4_K_M, but only ~15 GB is usable.

That figure is at a 4k context and moves about ±15% as context length changes.

The gap is about 4.1 GB: Granite 4.1 30B needs roughly 19.1 GB at Q4_K_M and Nvidia GeForce RTX 4080 (16GB) leaves only about 15 GB usable for a model. The lightest tracked hardware that runs Granite 4.1 30B is the Nvidia GeForce RTX 4090 (24GB) at 24 GB. See Granite 4.1 30B on Nvidia GeForce RTX 4090 (24GB).

Too big for Nvidia GeForce RTX 4080 (16GB)'s VRAM, but you could offload some layers to system RAM and still run it at roughly ~10 tok/s, far slower than a model that fits. How this is estimated.

Q4_K_M needed
~19.1 GB
Usable on device
~15 GB
Device memory
16 GB
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Which quant fits

Quant ladder vs ~15 GB usable
Q2_K
~14.2 GB
Q3_K_M
~16.2 GB
Q4_K_M
~19.1 GB
Q5_K_M
~22.7 GB
Q6_K
~25.8 GB
Q8_0
~33.1 GB
FP16
~60.1 GB
The line marks Nvidia GeForce RTX 4080 (16GB)'s ~15 GB budget; rungs past it are too large.
Model Granite
Parameters
28.9B
Q4_K_M size
17 GB
Q8_0 size
31 GB
Context
128k
Ollama tag
granite4.1:30b
Full Granite 4.1 30B requirements →
Device Windows
Memory
16 GB vram
Usable for weights
~15 GB
Power draw
~320 W
Best runtime
vLLM (Linux) / Ollama (CUDA)
Best models for Nvidia GeForce RTX 4080 (16GB) →

What you can run instead

Run Granite 4.1 30B on other hardware

FAQ

Can Nvidia GeForce RTX 4080 (16GB) run Granite 4.1 30B?

No. Granite 4.1 30B needs ~19.1 GB even at Q4_K_M, but Nvidia GeForce RTX 4080 (16GB) only has ~15 GB usable.

How much memory does Granite 4.1 30B need?

Nvidia GeForce RTX 4080 (16GB) does not have enough memory. At Q4_K_M the weights are ~17 GB; with KV cache and runtime overhead, budget ~19.1 GB at a 4k context.

What is the best tool to run Granite 4.1 30B on Windows?

LM Studio for a simple setup; Ollama (CUDA) for the most speed. AMD GPUs run via Vulkan/ROCm at roughly half CUDA throughput. NVIDIA is the smooth path on Windows.

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Sources

Weights are measured from GGUF files; KV cache and overhead are computed, so totals can vary ~15% with context and runtime. Any tok/s is a bandwidth estimate. See methodology.