DGX Spark vs RX 7900 XTX
Best sourced output tok/s per model (single-stream generation) — engine and version, quantization, context and a source link on every row. Hover a value for the quant.
DGX Spark52 sourced runs · best 86.8 tok/s
RX 7900 XTX6 verified runs · best 550.2 tok/s
Specs and evidence
| DGX Spark | RX 7900 XTX | |
|---|---|---|
| VRAM | 128 GB | 24 GB |
| Sourced runs on the board | 52 | 6 |
| Models measured | 9 | 5 |
| Best output tok/s | 86.8 tok/s | 550.2 tok/s |
| Highest measured peak VRAM | — | 22.9 GB |
| Street price (latest snapshot) | — | — |
Head-to-head
Only one model has been measured on both cards (Qwen3.8-27B). On that single data point DGX Spark records 56.0 tok/s and RX 7900 XTX records 154.2 tok/s — treat it as one data point, not a ranking.
The measured matrix
| Model | DGX Spark | RX 7900 XTX |
|---|---|---|
| Qwen3.5-0.8B | — | 550.2 |
| LFM2.5-350M | — | 398.4 |
| Qwen3.8-27B | 56.0 | 154.2 |
| Qwen3.6-35B-A3B | — | 150.0 |
| Qwen 3.8 Flash | 86.8 | — |
| Qwen3.6-35B-A3B-abliterated-v4 | — | 82.1 |
| Qwen3.8-Flash-Next | 75.7 | — |
| GLM-5.3-Flash | 64.1 | — |
| CYBER-FROST-3.8 | 60.7 | — |
| Qwen3.8-Flash-Next-hibrid48 | 60.0 | — |
| NVIDIA-Nemotron-3.5-Super-VL-120B-A12B | 48.0 | — |
| DeepSeek-V4.1-Flash | 47.0 | — |
| Underdog-Saluki-27B | 22.6 | — |