Can the Arc B580 run Qwen3 8B?
Fits comfortably at Q4_K_M.
Qwen3 8B is 8.2B parameters. At Q4_K_M the weights are about 4.6 GiB; with the 1.5 GiB runtime reserve that is 6.1 GiB against the card's 12GB, leaving about 5.9 GiB for context.
All three quants
12GB card| Quant | Weights | With reserve | Verdict | Headroom |
|---|---|---|---|---|
| Q4_K_Mthe everyday quant | 4.6 GiB | 6.1 GiB | Fits comfortably | 5.9 GiB |
| Q8_0near-lossless | 8.1 GiB | 9.6 GiB | Fits comfortably | 2.4 GiB |
| FP16full weights | 15.3 GiB | 16.8 GiB | Only with CPU offload | short 4.8 GiB |
Verdict rules: fits comfortably when weights plus reserve sit within 85% of VRAM; tight when they fit with little left for context; CPU offload when they exceed VRAM by up to 2x (runs, slowly, with layers in system RAM); no beyond that. The KV cache per token depends on the model's architecture and is not modelled here.
Good match. Get the card.
The Arc B580 clears Qwen3 8B at Q4_K_M and at Q8_0. Live listings below; this page was rebuilt 2026-08-23.
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About the model
Qwen3 8B by Alibaba Qwen: 32,768-token native context, text, released 2025 under the Apache-2.0. Model card → · Hosted pricing on PicksByModel →