Microsoft Tunes Windows for NVIDIA RTX Spark Laptops Ahead of Launch

Microsoft has tuned Windows 11 for NVIDIA RTX Spark laptops, adding platform-specific support for the Arm-based systems as they enter the market. The changes target CPU scheduling, shared memory, x86 app compatibility and local AI workloads.

RTX Spark combines an Arm-based NVIDIA Grace CPU with a Blackwell GPU. Configurations offer up to 20 CPU cores, 6,144 GPU cores and 128 GB of unified memory shared by the CPU and GPU. The platform targets local AI agents, creative applications and games on Windows.

Microsoft tuned workload profile scheduling so Windows can scale work across as many as 20 CPU cores. It also enabled Microsoft Power and Thermal Framework support for RTX Spark. Windows raises the amount of unified memory available to the GPU on high-memory systems and adjusts page sizes in shared memory regions.

The CPU and GPU use one shared memory pool. Windows’ changes address how much of that pool the GPU can access on high-memory systems and how the system handles shared pages.

Prism, Windows’ emulator for 32-bit and 64-bit x86 apps on Arm, has been tuned for RTX Spark. Apps built for Arm run directly, while Prism translates x86 software for the Arm processor; compatibility and performance can vary by app. Peter Dawoud, a Microsoft principal program manager, said, “Emulation isn’t generic. Each platform needs tuning.”

Windows ML also supports native use of NVIDIA TensorRT for local AI workloads. NVIDIA’s first-boot setup includes a “Getting Started” screen for choosing and installing an AI-agent app. It lists GitHub Copilot, Hermes, OpenClaw, Perplexity, Pi and WorkBuddy for local-model setup. NVIDIA OpenShell works with Microsoft Execution Containers as part of the agent-security setup.

Microsoft plans to include RTX Spark PCs in the Copilot+ PC category. Adrienne Brewbaker, Microsoft’s senior director of Windows marketing, said Copilot+ experiences are “expected to first become available to Windows Insiders later this year.” The laptops begin shipping Friday, Oct. 16.