AMD Radeon RX 7900 XT vs NVIDIA GeForce RTX 3090
For running models locally, priced in the UK. At 128k context the first runs 6 models fully in memory, the second 9.
Specifications
| Spec | AMD Radeon RX 7900 XT | NVIDIA GeForce RTX 3090 |
|---|---|---|
| GPU | Radeon RX 7900 XT | GeForce RTX 3090 |
| Memory | 20 GB GDDR6 | 24 GB GDDR6X |
| Memory bus | 320-bit | 384-bit |
| Memory bandwidth | 800 GB/s | 936 GB/s |
| FP16 compute | 103 TFLOPS | 71 TFLOPS |
| Software | ROCm | CUDA |
| Board power | 315 W | 350 W |
| PCIe generation | Gen 4 | Gen 4 |
| PCIe lanes | x16 | x16 |
What each runs
Estimated decode speed with the most precise quant that fits each one est.
| Model | AMD Radeon RX 7900 XT | NVIDIA GeForce RTX 3090 |
|---|---|---|
| Gemma 4 26B-A4B | offload | 63tok/sUD-Q4_K_M |
| gpt-oss 20B | 47tok/sMXFP4 | 62tok/sMXFP4 |
| Gemma 4 12B | 29tok/sQ8_0 | 38tok/sQ8_0 |
| Qwen 3.5 9B | 32tok/sQ8_0 | 42tok/sQ8_0 |
| Qwen 3.5 4B | 50tok/sQ8_0 | 66tok/sQ8_0 |
| Ministral 3 8B | offload | 25tok/sQ4_K_M |
| Gemma 4 E4B | 37tok/sQ8_0 | 48tok/sQ8_0 |
| LFM2.5 8B-A1B | 35tok/sQ8_0 | 46tok/sQ8_0 |
| Llama 3.1 8B | offload | 25tok/sQ5_K_M |
| Qwen 3.8 27B | offload | offload |
| Qwen 3.5 122B-A10B | offload | offload |
| Qwen 3.6 27B | offload | offload |
| Gemma 4 31B | offload | offload |
| Mistral Small 4 119B | offload | offload |
| Qwen 3.6 35B-A3B | offload | offload |
| Qwen 3.5 27B | offload | offload |
| Qwen 3.5 35B-A3B | offload | offload |
| GLM 4.7 Flash | offload | offload |
| Devstral Small 2 24B | offload | offload |
| Nemotron 3.5 Lightning 30B-A3B | offload | offload |
| Kimi Linear 48B-A3B | offload | offload |
| Qwen3 Coder 30B-A3B | offload | offload |
| Gemma 3 27B | offload | offload |
| Mistral Small 3.2 24B | offload | offload |
| Ministral 3 14B | offload | offload |
| Qwen3 14B | offload | offload |
| DeepSeek R1 0528 Qwen3 8B | offload | offload |
| Qwen3 8B | offload | offload |
| Phi-4 14B | offload | offload |
| Granite 4.2 8B | offload | offload |
| DeepSeek V4 Flash | won't run | won't run |
| GLM 5.3 Flash | won't run | won't run |
| Qwen 3.8 Flash Next | won't run | won't run |
| MiniMax M2.7 | won't run | won't run |
| Nemotron 3 Super 120B-A12B | won't run | won't run |
| Qwen3 Coder Next | won't run | won't run |
| gpt-oss 120B | won't run | won't run |
| GLM 4.5 Air | won't run | won't run |
| Qwen3 Next 80B-A3B | won't run | won't run |
| Qwen3 32B | won't run | won't run |
| DeepSeek R1 Distill Qwen 32B | won't run | won't run |
| Llama 3.3 70B | won't run | won't run |