Surface Laptop Ultra: the 128 GB ceiling is the binding constraint
The price is the concrete fact: $2,599 for a 24 GB, 512 GB configuration, while 128 GB models top out at $5,899.
The source describes the Surface Laptop Ultra as a Copilot+ notebook built around Nvidia's RTX Spark N1X, pairing an 18- or 20-core CPU with a Blackwell RTX GPU in the 5,120-to-6,144-core range.
Memory is the practical limit. The 128 GB ceiling can serve models up to 284 billion parameters only at 1.6-bit precision, and the stated 1 petaFLOP figure depends on 4-bit precision and 2:4 sparsity.
The source puts real-world inference nearer to 500 teraFLOPS, a figure that keeps the chip ahead of AMD's Strix and Gorgon Halo processors.
What remains unmeasured is sustained thermal output, power draw, and inference throughput under a fixed workload, so the price claim cannot be tied to a measured silicon configuration.
The buyer is constrained by memory and unspecified precision, not by the stated core counts.
Lead with price and memory ceiling; keep the unmeasured inference and thermal caveats.
NVIDIA RTX Spark Superchip · NVIDIA Grace CPU with up to 20 cores · NVIDIA Blackwell RTX GPU with up to 6,144 cores · up to 128 GB of unified memory · models exceeding 120B parameters · up to 1 petaflop of AI performance
After microsoft.com. We did not report this. The pictures, if any, are theirs. Also filed by microsoft.com, Wccftech, TechCrunch AI, ComputerBase.
