NVIDIA DGX Spark vs AMD Radeon 780M for local LLMs
57 reports on the NVIDIA DGX Spark and 5 on the AMD Radeon 780M
Which is faster for local LLMs?
On Gemma 4 26B · 4B active at 4-bit, the NVIDIA DGX Spark runs at 69.9 tokens per second (one run) and the AMD Radeon 780M at 25.0 (one run). Those are community reports whose engines and settings differ, so the gap is a rough sign, not a controlled measure of the two cards. Memory bandwidth, which caps how fast a card can write, is 2.3x higher on the NVIDIA DGX Spark (273 GB/s on the NVIDIA DGX Spark, 120 on the AMD Radeon 780M).
- Memory
- 128GB unified
- Memory bandwidth
- 273 GB/s
- FP16 compute
- 125 TFLOPS
- Reports
- 57
- Memory
- shared memory unified
- Memory bandwidth
- not on record
- FP16 compute
- not on record
- Reports
- 5
Measured on both
Median tokens per second from plain runs (one device, one request, no speculative decoding, the whole model in the device's memory) of the same model size at the same quant level. Engines and context lengths can still differ between the runs. How to read these
| Model | NVIDIA DGX Spark | AMD Radeon 780M |
|---|---|---|
| Gemma 4 26B · 4B active4-bit | 69.9one run | 25.0one run |
Estimated by the calculator
The quant the calculator recommends for each card and its estimated speed at a 32,768-token context with 32 GB of system RAM, from memory bandwidth and the model's shape. Where a model was also measured above, the measurement wins.
| Model | NVIDIA DGX Spark | AMD Radeon 780M |
|---|---|---|
| Gemma 4 26B · 4B active | 10.8 t/sFP16 | not in the calculator yet |
| Qwen3.8 27B | 4.0 t/sFP16 | not in the calculator yet |
| Qwen3.8 125B · 6B active | 14.4 t/sQ6_K | not in the calculator yet |
| DeepSeek V4 Flash 284B · 13B active | 38.3 t/sQ2_K | not in the calculator yet |
| Qwen3.6 35B · 3B active | 14.5 t/sFP16 | not in the calculator yet |
| Qwen3.6 27B | 4.0 t/sFP16 | not in the calculator yet |
| DeepSeek V4.1 Flash 552B · 16B active | doesn't fit at these settings | not in the calculator yet |
Change the context, RAM or model in the calculator: NVIDIA DGX Spark · AMD Radeon 780M
Every report on each card, with its source: NVIDIA DGX Spark · AMD Radeon 780M