Autor: Jakub Rusinowski · Ostatnia aktualizacja: 11 września 2026
Not at MXFP4 — that needs 11.1 GB and the Intel Arc B580 has 12 GB. Drop to Q3_K_M and it fits in 10.1 GB, with up to 16K of context.
| Model | GPT-OSS 20B |
| Parameters | 20B |
| Quantization | MXFP4 |
| VRAM needed | 11.1 GB |
| Intel Arc B580 VRAM | 12 GB |
| Verdict | Runs at a lower quant |
| Fits at | Q3_K_M (10.1 GB) |
| Max context | 16K |
Quantize to Q3_K_M. That is the cheapest fix — it costs some quality but no money.
Running GPT-OSS 20B on this card:
GPT-OSS 20B needs ~11 GB but this GPU has 12 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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All GPT-OSS sizes on the Intel Arc B580 | VRAM calculator for GPT-OSS 20B | Intel Arc B580 GPU page | Check your hardware