GPU comparison
Mac Studio M5 Ultra (256GB) vs NVIDIA DGX Spark (GB10, 128GB) for local LLMs
How the two stack up for running open-source LLMs locally — memory, bandwidth, price, and how many of the 64 tracked models each one can run.
| Mac Studio M5 Ultra (256GB) | NVIDIA DGX Spark (GB10, 128GB) | |
|---|---|---|
| Memory | 256.0 GB | 128.0 GB |
| Bandwidth | 1228 GB/s | 273 GB/s |
| Price (approx) | $9,499 | $4,699 |
| LLMs it runs | 60 of 64 | 57 of 64 |
| Best model it runs | GLM-5.3 Flash (MoE) · 61–91 tok/s | Qwen3.8 Flash Next (MoE) · 47–70 tok/s |
The Mac Studio M5 Ultra (256GB) runs 3 more of the tracked models (60 vs 57), thanks to its 256.0 GB of memory. The Mac Studio M5 Ultra (256GB) has more memory bandwidth (1228 GB/s), so it generates tokens faster at the same model and quant.