NVIDIA DGX Spark 128GB vs Mac Studio M3 Ultra 512GB
For running models locally, priced in the UK. At 64k context the first runs 42 models fully in memory, the second 42.
Specifications
| Spec | NVIDIA DGX Spark 128GB | Mac Studio M3 Ultra 512GB |
|---|---|---|
| Chip | GB10 Grace Blackwell | Apple M3 Ultra (80-core GPU) |
| Memory bus | 256-bit | 1024-bit |
| Memory bandwidth | 273 GB/s | 819 GB/s |
| FP16 compute | 62 TFLOPS | 28 TFLOPS |
| Software | CUDA | Metal |
| Unified memory | 128 GB | 512 GB |
| GPU can use by default | 119 GB | 384 GB |
| GPU can use, tuned | 122 GB | 504 GB |
| Operating system | dgx-os | macos |
| Processor | 20-core Arm (GB10) | M3 Ultra 32-core |
| Storage | 4000 GB | 2000 GB |
What each runs
Estimated decode speed with the most precise quant that fits each one est.
| Model | NVIDIA DGX Spark 128GB | Mac Studio M3 Ultra 512GB |
|---|---|---|
| DeepSeek V4 Flash | 8tok/sUD-Q2_K_XL | 19tok/sUD-Q4_K_XL |
| GLM 5.3 Flash | 11tok/sUD-Q2_K_XL | 12tok/sQ8_0 |
| Qwen 3.8 Flash Next | 3tok/sUD-Q4_K_XL | 5tok/sQ8_0 |
| Qwen 3.8 27B | 5tok/sQ8_0 | 16tok/sQ8_0 |
| MiniMax M2.7 | 5tok/sUD-Q3_K_M | 11tok/sQ8_0 |
| Qwen 3.5 122B-A10B | 10tok/sQ6_K | 26tok/sQ8_0 |
| Qwen 3.6 27B | 5tok/sQ8_0 | 16tok/sQ8_0 |
| gpt-oss 120B | 18tok/sMXFP4 | 58tok/sMXFP4 |
| Qwen3 Coder Next | 18tok/sQ8_0 | 55tok/sQ8_0 |
| Nemotron 3 Super 120B-A12B | 9tok/sUD-Q6_K | 24tok/sQ8_0 |
| Gemma 4 31B | 4tok/sQ8_0 | 14tok/sQ8_0 |
| Mistral Small 4 119B | 14tok/sUD-Q6_K | 36tok/sQ8_0 |
| Qwen 3.6 35B-A3B | 23tok/sQ8_0 | 71tok/sQ8_0 |
| Qwen 3.5 27B | 5tok/sQ8_0 | 16tok/sQ8_0 |
| Gemma 4 26B-A4B | 18tok/sQ8_0 | 56tok/sQ8_0 |
| GLM 4.5 Air | 4tok/sQ6_K | 11tok/sQ8_0 |
| Qwen 3.5 35B-A3B | 23tok/sQ8_0 | 71tok/sQ8_0 |
| Qwen3 Next 80B-A3B | 21tok/sQ8_0 | 66tok/sQ8_0 |
| GLM 4.7 Flash | 12tok/sQ8_0 | 36tok/sQ8_0 |
| Devstral Small 2 24B | 5tok/sQ8_0 | 15tok/sQ8_0 |
| Nemotron 3.5 Lightning 30B-A3B | 27tok/sUD-Q6_K_XL | 85tok/sUD-Q6_K_XL |
| Kimi Linear 48B-A3B | 27tok/sQ8_0 | 85tok/sQ8_0 |
| gpt-oss 20B | 25tok/sMXFP4 | 79tok/sMXFP4 |
| Qwen3 Coder 30B-A3B | 11tok/sQ8_0 | 33tok/sQ8_0 |
| Qwen3 32B | 3tok/sQ8_0 | 10tok/sQ8_0 |
| Gemma 4 12B | 12tok/sQ8_0 | 38tok/sQ8_0 |
| Qwen 3.5 9B | 14tok/sQ8_0 | 45tok/sQ8_0 |
| Gemma 3 27B | 5tok/sQ8_0 | 15tok/sQ8_0 |
| Mistral Small 3.2 24B | 5tok/sQ8_0 | 15tok/sQ8_0 |
| DeepSeek R1 Distill Qwen 32B | 3tok/sQ8_0 | 10tok/sQ8_0 |
| Llama 3.3 70B | 2tok/sQ8_0 | 6tok/sQ8_0 |
| Ministral 3 14B | 7tok/sQ8_0 | 21tok/sQ8_0 |
| Qwen3 14B | 6tok/sQ8_0 | 20tok/sQ8_0 |
| DeepSeek R1 0528 Qwen3 8B | 9tok/sQ8_0 | 29tok/sQ8_0 |
| Qwen3 8B | 9tok/sQ8_0 | 29tok/sQ8_0 |
| Phi-4 14B | 6tok/sQ8_0 | 18tok/sQ8_0 |
| Qwen 3.5 4B | 25tok/sQ8_0 | 80tok/sQ8_0 |
| Ministral 3 8B | 9tok/sQ8_0 | 29tok/sQ8_0 |
| Granite 4.2 8B | 8tok/sQ8_0 | 27tok/sQ8_0 |
| Gemma 4 E4B | 17tok/sQ8_0 | 53tok/sQ8_0 |
| LFM2.5 8B-A1B | 24tok/sQ8_0 | 75tok/sQ8_0 |
| Llama 3.1 8B | 11tok/sQ6_K | 35tok/sQ6_K |