Microsoft and Nvidia took the stage together in San Francisco on October 7 to unveil the Surface Laptop Ultra, a premium 15-inch Windows laptop powered by Nvidia's RTX Spark — the chipmaker's first Arm-based processor built for Windows PCs. The machine starts at $2,599 and ships October 16, with a companion $5,999 Surface RTX Spark Dev Box mini PC arriving in November.
The heart of the announcement is the RTX Spark N1X system-on-chip: an Arm-based CPU paired with a Blackwell-generation GPU packing up to 6,144 CUDA cores, plus up to 128 GB of unified LPDDR5X memory shared between processor and graphics. That unified memory architecture is the point — the top configuration, priced around $5,899, can load very large AI models entirely into fast local memory instead of shuttling weights across a PCIe bus. Microsoft says the machine can run models in the 120-billion-parameter class and deliver roughly a petaflop of FP4 AI compute.
The base $2,599 configuration pairs an 18-core CPU with 24 GB of unified memory and 512 GB of storage — Microsoft clarified the base chip's core count a day after the event, after early materials listed a lower figure. The 15-inch touchscreen display claims up to 2,000 nits of peak HDR brightness at 120 Hz, and the laptop gains built-in magnetic USB-C charging in place of the old proprietary Surface Connect port. Microsoft is even offering a MacBook Pro trade-in incentive to lure high-end buyers over.
Software gets equal billing. Windows 11 is gaining a Copilot redesign aimed at agent workflows, a "Hybrid Intelligence" routing layer that decides whether a task runs on the local model or in the cloud, and Microsoft Execution Containers (MXC) that sandbox AI agents so they cannot run amok on the file system. Copilot is also getting deeper access to Windows itself, including folder search, rename, and archive actions performed directly from the assistant.
Perhaps the most telling detail: Microsoft is not alone. Dell, HP, Asus, Lenovo, MSI, and Acer are all expected to ship RTX Spark-powered laptops starting October 16, turning the Ultra into the flagship of a full Nvidia-powered Windows lineup rather than a one-off. After years of Windows on Arm belonging mostly to Qualcomm's Snapdragon X, Nvidia is positioning its silicon as the GPU-and-memory play for developers and creators — with a $5,999 dev box that undercuts Nvidia's own $6,950 DGX Spark developer station.
The open questions are the ones no keynote slide can answer: sustained AI throughput under real thermal limits, battery life with that Blackwell GPU working hard, and whether buyers will swallow unified-memory pricing at a time when DRAM costs remain elevated. Those answers arrive with independent reviews. But the direction of travel is unmistakable — the AI PC wars have moved from the cloud to the desk, and Nvidia just claimed the premium tier.