Microsoft's Surface RTX Spark Dev Box: Mini PC for local AI with 128GB memory
Runs 120B parameter models locally with Nvidia's Arm-based RTX Spark chips
Microsoft has announced the Surface RTX Spark Dev Box, a miniature PC designed specifically for AI developers who need powerful local computing. The device is powered by Nvidia's new Arm-based RTX Spark chips, the same ones found in the Surface Laptop Ultra, but optimized for sustained workloads. With 128GB of unified memory and a 100W thermal envelope, it can run large language models up to 120 billion parameters entirely on-device, making it a potent tool for local-first AI development. The aluminum chassis is designed to act as a heatsink, reminiscent of the Xbox Series X top.
Microsoft preconfigures the Dev Box with Windows 11 Pro in a developer-optimized mode — dark theme, simplified taskbar, no widgets, Do Not Disturb enabled, and PowerShell 7 as default. It ships with Visual Studio Code, GitHub Copilot, and other tools. This device directly replaces Qualcomm's canceled Snapdragon Dev Kit, which was meant to help port apps to Windows on Arm. While pricing and full specs are pending, the Surface RTX Spark Dev Box will be available later this year from Microsoft's online store, joining other OEMs embracing Nvidia's RTX Spark chips for compact AI workstations.
- 128GB unified memory enables running up to 120 billion parameter models locally
- Powered by Nvidia's Arm-based RTX Spark chips with a 100W thermal envelope
- Preconfigured with Windows 11 Pro developer mode, VS Code, and GitHub Copilot
Why It Matters
Gives AI developers a dedicated mini workstation for local model inference and app porting to Windows on Arm.