Written by Jakub Rusinowski · Last updated July 12, 2026
20 GB VRAM is a unique sweet spot — fits all 14B models with a larger context than 16GB cards. Great for AMD users who want more VRAM than the 7800 XT.
| VRAM | 20 GB |
| Memory Bandwidth | 800 GB/s |
| TDP | 315 W |
| Architecture | RDNA 3 Navi 31 |
| Release Year | 2022 |
| MSRP at Launch | $899 |
| Inference Speed (Llama 3.1 8B Q4_K_M) | 47–98 tok/s (estimated) |
| Inference Speed (Llama 3.3 70B Q4_K_M) | Does not fit — needs ~44 GB of 20 GB usable |
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All models below run comfortably in 20 GB VRAM with Q4_K_M quantization.
| Llama 3.1 Family | Llama 3.1 8B Instruct · 6 GB VRAM · Q4_K_M · ollama run llama3.1 |
| DeepSeek R1 | DeepSeek R1 Distill Qwen 14B · 9 GB VRAM · Q4_K_M · ollama run deepseek-r1:14b |
| Qwen 3 | Qwen 3 30B-A3B (MoE) · 19 GB VRAM · Q4_K_M · ollama run qwen3:30b-a3b |
| Gemma 3 | Gemma 3 27B Instruct · 17 GB VRAM · Q4_K_M · ollama run gemma3:27b |
| Mistral Small 3.1 | Mistral Small 3.1 24B · 15 GB VRAM · Q4_K_M · ollama run mistral-small3.1 |
| Phi-4 Family | Phi-4 (14B) · 9 GB VRAM · Q4_K_M · ollama run phi4 |
Install Ollama then run the recommended model for this GPU:
ollama run qwen3:14b
Yes — the AMD Radeon RX 7900 XT has 20 GB VRAM and runs 20 GB VRAM is a unique sweet spot — fits all 14B models with a larger context than 16GB cards. Great for AMD users who w
The AMD Radeon RX 7900 XT is estimated to run Llama 3.1 8B at 47–98 tok/s with Q4_K_M quantization. Llama 3.3 70B does not fit: it needs about 44 GB against 20 GB usable. These are modelled estimates, not measurements — see /en/methodology.
With 20 GB you can run: Llama 3.1 Family, DeepSeek R1, Qwen 3, Gemma 3, Mistral Small 3.1. Use Ollama for the easiest setup: ollama run qwen3:14b.
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