Autor: Jakub Rusinowski · Ostatnia aktualizacja: 15 sierpnia 2026
Yes. GPT-OSS 20B needs 10.6 GB at MXFP4 and the AMD Radeon RX 7900 XT has 20 GB, leaving about 9.4 GB of headroom, at roughly 41 tok/s (estimated) with room for up to 128K of context.
| Model | GPT-OSS 20B |
| Parameters | 20B |
| Quantization | MXFP4 |
| VRAM needed | 10.6 GB |
| AMD Radeon RX 7900 XT VRAM | 20 GB |
| Verdict | Runs |
| Max context | 128K |
| Estimated speed | ~41 tok/s |
Nothing to change — run it at MXFP4. If you want more capability, check whether the next size up also fits.
Running GPT-OSS 20B on this card:
At 2 hrs/day, buying (~$899) beats renting at $0.34/hr after about 3.7 years.
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
All GPT-OSS sizes on the AMD Radeon RX 7900 XT | VRAM calculator for GPT-OSS 20B | AMD Radeon RX 7900 XT GPU page | Check your hardware