Written by Jakub Rusinowski · Last updated August 15, 2026
No. GPT-OSS 20B needs 10.6 GB at MXFP4 and the AMD Radeon RX 9060 XT 8GB has only 8 GB. No quantization we publish closes a gap that size.
| Model | GPT-OSS 20B |
| Parameters | 20B |
| Quantization | MXFP4 |
| VRAM needed | 10.6 GB |
| AMD Radeon RX 9060 XT 8GB VRAM | 8 GB |
| Verdict | Does not fit |
Either step down to a smaller size in this family, or move to a NVIDIA GeForce RTX 5070 (12 GB), the cheapest card we track with enough VRAM.
Cheapest card we track with enough VRAM for GPT-OSS 20B:
GPT-OSS 20B needs ~11 GB but this GPU has 8 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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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 9060 XT 8GB | VRAM calculator for GPT-OSS 20B | AMD Radeon RX 9060 XT 8GB GPU page | Check your hardware