NVIDIA DGX Spark (128 GB) — Local LLM Performance

NVIDIA DGX Spark (128 GB) is a Mini PC running Linux, with 128 GB unified memory.

Specifications

Memory for models	128 GB unified
Memory bandwidth	273 GB/s
Memory upgradeable	No — soldered, decided at purchase
Chip	NVIDIA GB10 Grace Blackwell
Architecture	GB10 Grace Blackwell Superchip
Form factor	Mini PC
Operating system	Linux
Released	2025
Llama 3.1 8B Q4_K_M	26–53 tok/s

Worth knowing before you buy

• Memory is soldered; 128 GB is the only configuration.
• Price rose sharply after launch as memory supply tightened — check the current figure before budgeting.

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