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text model · Granite · Windows

Can I run Granite 4.1 3B on 32GB RAM Laptop (CPU/iGPU only)?

Compatibility verdict VRAM threshold engine
Yes, it runs usable speed ~21 tok/s est.

Yes. Granite 4.1 3B runs on 32GB RAM Laptop (CPU/iGPU only) at Q4_K_M (~3.3 GB of ~28 GB usable).

Needs ~3.3 GB Device usable ~28 GB

Runs at Q4_K_M using ~3.3 GB of ~28 GB usable. You have room for FP16 for higher quality.

That figure is at a 4k context and moves about ±15% as context length changes. 32GB RAM Laptop (CPU/iGPU only) leaves ~24.7 GB of headroom, room to step up to FP16 for higher quality.

Q4_K_M needed
~3.3 GB
Usable on device
~28 GB
Device memory
32 GB
Best quant
Q4_K_M
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Which quant fits

Quant ladder vs ~28 GB usable
Q2_K
~2.6 GB
Q3_K_M
~2.9 GB
Q4_K_M
~3.3 GB
Q5_K_M
~3.6 GB
Q6_K
~4 GB
Q8_0
~4.8 GB
FP16
~8 GB
The line marks 32GB RAM Laptop (CPU/iGPU only)'s ~28 GB budget; rungs past it are too large.

Running cost · estimate

Power & economics est.
Power draw
~28 W
Electricity / 1M tokens
~$0.06
Pays for itself after
~2,500M tok

At ~$0.15/kWh and the estimated ~21 tok/s, a million generated tokens costs about $0.06 in electricity. Versus a hosted API at ~$0.5 per million tokens, the ~$1,100 32GB RAM Laptop (CPU/iGPU only) pays for itself after roughly 2,500 million tokens, so local hardware is mostly a fixed cost, not a per-token one. TDP is the peak draw, so this is an upper bound. Assumptions.

Run it

Install commands Windows

Loads the Q4_K_M weights.

Ollama
$ ollama run granite4.1:3b
Model Granite
Parameters
3.4B
Q4_K_M size
2.1 GB
Q8_0 size
3.6 GB
Context
128k
Ollama tag
granite4.1:3b
Full Granite 4.1 3B requirements →
Device Windows
Memory
32 GB ram
Usable for weights
~28 GB
Power draw
~28 W
Best runtime
Ollama (llama.cpp backend)
Best models for 32GB RAM Laptop (CPU/iGPU only) →

You could also run

Run Granite 4.1 3B on other hardware

FAQ

Can 32GB RAM Laptop (CPU/iGPU only) run Granite 4.1 3B?

Yes. Granite 4.1 3B runs on 32GB RAM Laptop (CPU/iGPU only) at Q4_K_M (~3.3 GB of ~28 GB usable).

How much memory does Granite 4.1 3B need?

32GB RAM Laptop (CPU/iGPU only) has room to spare. At Q4_K_M the weights are ~2.1 GB; with KV cache and runtime overhead, budget ~3.3 GB at a 4k context.

What is the best tool to run Granite 4.1 3B 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.