Can RX 7600 8GB run gpt-oss-20b?

AMD · 8 GB GDDR6 · 288 GB/s bandwidth · OpenAI · 21.5B (active 3.6B) · MoE · model ctx up to 128K

No — gpt-oss-20b at Q4 needs ≈ 13.19 GB even at 4K context, beyond the RX 7600 8GB's 8 GB GDDR6. It would only run with heavy CPU/disk offload. Decode at Q4/8K: ≈ 50.7 tok/s (estimated, batch 1). FP16 needs ≈ 44.72 GB — does not fit on this card. Estimates come from memory-bandwidth math; rows tagged measured override estimates. Relative ranking is more reliable than absolute tok/s. Methodology.

Fit & speed by quant and context

Quant	Context	VRAM needed	Fits?	tok/s (decode)
Q4	4K	13.19 GB	No	53.5 est.
Q4	8K default	13.55 GB	No	50.7 est.
Q4	32K	15.71 GB	No	37.7 est.
FP16	4K	44.36 GB	No	—
FP16	8K default	44.72 GB	No	—
FP16	32K	46.88 GB	No	—

Fits = weights + KV(ctx) + 1 GB overhead ≤ 95% of VRAM. Measured anchors are context-agnostic; the fit verdict is recomputed per context. A missing tok/s means the model is far beyond this card (offload-only territory).

VRAM breakdown at 8K context

Quant	Weights	KV cache	Overhead	Total needed	RX 7600 8GB VRAM
Q4	11.83 GB	0.72 GB	1 GB	13.55 GB	8 GB
FP16	43.0 GB	0.72 GB	1 GB	44.72 GB	8 GB

Other GPUs that run gpt-oss-20b

• B200 192GB SXM — ≈1414.1 tok/s Q4 est.
• MI300X 192GB — ≈936.9 tok/s Q4 est.
• H200 141GB SXM5 — ≈848.5 tok/s Q4 est.
• H100 80GB SXM5 — ≈592.2 tok/s Q4 est.
• Gaudi 3 128GB — ≈579.1 tok/s Q4 est.
• A100 80GB SXM4 — ≈360.4 tok/s Q4 est.
• RTX 5090 32GB — ≈282.5 tok/s Q4 measured
• RTX 4090 24GB — ≈225.2 tok/s Q4 measured

All GPUs for gpt-oss-20b →

Other models for the RX 7600 8GB

• Qwen3-0.6B — ≈229.1 tok/s Q4 est.
• gemma-3-1b-it — ≈183.3 tok/s Q4 est.
• Llama-3.2-1B-Instruct — ≈152.7 tok/s Q4 est.
• Qwen3-1.7B — ≈91.6 tok/s Q4 est.
• Llama-3.2-3B-Instruct — ≈57.3 tok/s Q4 est.
• Phi-4-mini-instruct — ≈48.2 tok/s Q4 est.
• Phi-4-mini-reasoning — ≈48.2 tok/s Q4 est.
• gemma-3-4b-it — ≈47.0 tok/s Q4 est.

All models on the RX 7600 8GB →