NVIDIA RTX Spark pairs Grace CPU with Blackwell GPU sharing up to 128GB, 1 petaflop FP4
bestvicam · reddit · 2026-10-30
NVIDIA's RTX Spark laptops pair a Grace CPU and a Blackwell RTX GPU in a single package, with the CPU and GPU addressing a unified pool of up to 128GB of memory instead of separate RAM and VRAM. NVIDIA rates the chip at up to 1 petaflop of FP4 AI performance.
For local model runners, shared memory removes the RAM/VRAM split, enabling larger models on a laptop. However, the announcement doesn't specify how memory bandwidth or sustained FP4 performance compares to discrete GPU setups — the factors that actually determine inference speed.
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