Microsoft debuts Surface RTX Spark Dev Box — Nvidia-powered mini-PC helps devs get ready for an agentic Windows

Tom's Hardware reports that Microsoft has unveiled the Surface RTX Spark Dev Box at Computex 2026, a compact desktop powered by NVIDIA's RTX Spark N1X processor designed specifically for developers building agentic AI applications on Windows. The Dev Box represents Microsoft's effort to put RTX Spark hardware into the hands of the developer community ahead of wider consumer availability, ensuring that the software ecosystem for RTX Spark-powered PCs is robust at launch.

According to the report, the Surface RTX Spark Dev Box is a mini-PC form factor that packs the full RTX Spark N1X chip with its 20-core Arm CPU, RTX 5070-class Blackwell GPU with 6,144 CUDA cores, and up to 128GB of unified LPDDR5X memory. This hardware configuration enables developers to build, test, and optimize AI agents locally — running large language models with up to 120 billion parameters, testing CUDA-accelerated workloads, and validating Windows on Arm compatibility for their applications without relying on cloud infrastructure.

Tom's Hardware notes that the Dev Box strategy mirrors NVIDIA's earlier DGX Spark developer workstation program, where seeding hardware to the developer community accelerated the adoption of NVIDIA's AI development tools. By providing developers with RTX Spark hardware before the first consumer laptops ship this fall, Microsoft and NVIDIA aim to ensure that Windows 11's Copilot+ PC features and AI agent framework have a rich library of optimized applications from day one. Pricing and availability for the Surface RTX Spark Dev Box developer program have not yet been announced.