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Run LLM Locally

Qwen3 8B on the Arc B580

With 12 GB of VRAM, the Arc B580 runs Qwen3 8B at Q4_K_M entirely on the GPU with an 8K context (about 7 GB needed). At Q8_0 it fits entirely.

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Qwen3 8B

Q4_K_M · 8K context

Excellent

The model needs about 7 GB and fits in the 11.6 GB available, with 4.6 GB to spare.

Your hardware
Arc B580 12 GB · 64 GB RAM
Estimated memory
~7 GB estimate
VRAM (usable memory)
11.6 GB
GPU only
Yes
CPU/GPU offload
Not required
Generation speed
30–48 tok/s estimate
Largest context in fast memory
39K tokens
Confidence: low

Based on: memory bandwidth (456 GB/s) and model size

Memory breakdown

~7 GB (6.5 GB–7.5 GB) needed · estimate

Fits entirely in VRAM · 4.6 GB left

  • Model weights4.7 GB
  • KV cache1.1 GB
  • Runtime overhead0.9 GB
  • Safety margin0.3 GB
Assumptions: context 8K tokens · KV cache f16 · llama.cpp (SYCL) · flash attention on · weights = real file size

EstimateData updated 24 days agoSource: Run LLM Locally engine, Hugging Face config.json + model card

What makes this estimate less reliable

  • no benchmark for this hardware and model yet

Other quantizations on the Arc B580

Qwen3 8B on Arc B580 + 64 GB RAM · 8K context
Qwen3 8B Q8_08K~10.6 GB · 19–29 tok/s estimateCompatible
Qwen3 8B Q6_K8K~8.7 GB · 23–37 tok/s estimateExcellent
Qwen3 8B Q5_K_M8K~7.8 GB · 27–42 tok/s estimateExcellent
Qwen3 8B Q4_K_M8K~7 GB · 30–48 tok/s estimateExcellent
Qwen3 8B IQ4_XS8K~6.5 GB · 33–52 tok/s estimateExcellent
Qwen3 8B Q3_K_M8K~6.1 GB · 36–57 tok/s estimateExcellent

Alternatives

GPUs that run Qwen3 8B Q4_K_M entirely in VRAM

Other models that fit the Arc B580

Where to buy a Arc B580

Prices and links follow the market you choose.

Intel Arc B580

12 GB GDDR6 · 456 GB/s · 190 W

ExcellentRuns Qwen3 8B Q4_K_M entirely in memory

Price not available

Availability unknown

View on amazon.com

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No current offer imported for this market: the link opens a marketplace search.

Frequently asked questions

Can the Arc B580 run Qwen3 8B?
The model needs about 7 GB and fits in the 11.6 GB available, with 4.6 GB to spare.
Which quantization should I use on the Arc B580?
Q8_0 is the highest-precision quantization that fits entirely in VRAM at 8K context. ~10.6 GB / 11.6 GB.
What is the largest context on the Arc B580?
At Q4_K_M, about 39K tokens fit entirely in VRAM with an f16 KV cache. A q8_0 KV cache roughly doubles that.
How fast is Qwen3 8B (Arc B580)?
We estimate 30–48 tok/s (estimate, confidence low). Based on: memory bandwidth (456 GB/s) and model size.