text model · Llama · Windows

Can I run Llama 3.1 8B on 32GB RAM Laptop (CPU/iGPU only)?

Compatibility verdict VRAM threshold engine

Yes, it runs usable speed ~9 tok/s est.

Yes. Llama 3.1 8B runs on 32GB RAM Laptop (CPU/iGPU only) at Q4_K_M (~6.4 GB of ~28 GB usable).

Needs ~6.4 GB Device usable ~28 GB

Runs at Q4_K_M using ~6.4 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 ~21.6 GB of headroom, room to step up to FP16 for higher quality.

Q4_K_M needed: ~6.4 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

~4.9 GB

Q3_K_M

~5.4 GB

Q4_K_M

~6.4 GB

Q5_K_M

~7.2 GB

Q6_K

~8.1 GB

Q8_0

~10 GB

FP16

~17.5 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: ~$0.13
Pays for itself after: ~2,973M tok

At ~$0.15/kWh and the estimated ~9 tok/s, a million generated tokens costs about $0.13 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 2,973 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

Pick your tool. All 3 load the same Q4_K_M weights.

Ollama

$ ollama run llama3.1:8b

llama.cpp

$ llama-cli -hf bartowski/Meta-Llama-3.1-8B-Instruct-GGUF:Q4_K_M

LM Studio

$ lms get bartowski/Meta-Llama-3.1-8B-Instruct-GGUF

Model Llama

Parameters: 8B
Q4_K_M size: 4.92 GB
Q8_0 size: 8.54 GB
Context: 128k
Ollama tag: llama3.1:8b

Full Llama 3.1 8B 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 Llama 3.1 8B on other hardware

Nvidia GeForce RTX 3060 (12GB)Nvidia GeForce RTX 4070 (12GB)Samsung Galaxy S24 Ultra Generic Android Phone (12GB RAM)iPhone 17 Pro iPhone Air

FAQ

Can 32GB RAM Laptop (CPU/iGPU only) run Llama 3.1 8B?

Yes. Llama 3.1 8B runs on 32GB RAM Laptop (CPU/iGPU only) at Q4_K_M (~6.4 GB of ~28 GB usable).

How much memory does Llama 3.1 8B need?

32GB RAM Laptop (CPU/iGPU only) has room to spare. At Q4_K_M the weights are ~4.92 GB; with KV cache and runtime overhead, budget ~6.4 GB at a 4k context.

What is the best tool to run Llama 3.1 8B 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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Markdown

[![Llama 3.1 8B on 32GB RAM Laptop (CPU/iGPU only)](https://localmodel.run/badge/llama-3.1-8b/laptop-32gb.svg)](https://localmodel.run/can-i-run/llama-3.1-8b/laptop-32gb)

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.