This October, Nvidia steps onto turf it has never occupied before. The RTX Spark N1X — a single chip fusing a NVIDIA Grace ARM CPU with a Blackwell GPU — is finally shipping inside laptops and compact desktops from Dell, HP, Lenovo, ASUS, MSI, and Microsoft.
The chip comes in two flavors. The flagship pairs a 20-core Grace CPU with a Blackwell GPU carrying 6,144 CUDA cores, and supports between 24 and 128 GB of LPDDR5X unified memory with up to 300 GB/s of bandwidth. A second variant trims to 18 CPU cores and 5,120 CUDA cores, with memory capped at 32 GB. Both share a single unified memory pool — no discrete VRAM, no data copying between CPU and GPU — which is the architectural bet at the heart of the platform.
The performance headline Nvidia is pushing is 1 petaflop of FP4 AI inference on the flagship chip. That number is designed to resonate with a market where on-device AI workloads — LLM inference, image generation, code completion — are becoming baseline expectations rather than edge cases.
The Microsoft Surface Laptop Ultra is the highest-profile launch device. Announced at Computex 2026, it pairs the N1X with a 15-inch mini-LED display running at 262 PPI with 2,000 nits peak HDR brightness, all in a chassis under 4.5 lbs. It's Microsoft's boldest Surface in years, and the first to run an Nvidia ARM CPU.
For Windows software compatibility, RTX Spark leans on the same x86 emulation layer that powered Microsoft's Snapdragon-based Copilot+ PCs. Most native x64 applications run without changes; software that dips into AVX-512 or exotic x86 extensions may still hit rough edges, but the ecosystem has had two years to catch up since the Snapdragon rollout.
The bigger question is whether 128 GB of unified memory changes what you actually do on a laptop. Apple's M-series chips proved the architecture works — unified memory lets the GPU borrow headroom that discrete VRAM never has — and Nvidia's bet is that its GPU software ecosystem (CUDA, DLSS, RTX path tracing) provides enough differentiation to pull workstation users who couldn't justify a Mac.
Pricing hasn't been uniformly announced across all makers, but the Microsoft Surface Laptop Ultra is expected to start in the $1,800–$2,200 range, with 128 GB configurations pushing considerably higher.
Whether RTX Spark becomes a platform or a footnote depends on driver stability and application support at launch — both areas where Nvidia's first ARM Windows outing has room to stumble. But the hardware ambition is clear: Nvidia wants the whole PC, not just the GPU slot.