Microsoft introduced the Surface RTX Spark Dev Box at Build, positioning it as a desktop counterpart to the Surface Laptop Ultra for heavy AI workloads. Powered by NVIDIA RTX Spark, the machine supports up to 128 GB of unified memory and a petaflop of AI compute, while its 100 W thermal envelope keeps temperatures in check.

The dev box pairs a low‑power Arm CPU with an integrated RTX Blackwell GPU, delivering graphics performance comparable to a laptop‑class RTX 5070. Its specifications echo those of AMD’s Ryzen AI Halo PC and NVIDIA’s DGX Spark mini, both priced around $3,999, signaling Microsoft’s aim at the same developer segment.

Microsoft says the Surface RTX Spark Dev Box will ship later this year exclusively via its website, bypassing traditional retail channels. By offering a purpose‑built AI workstation without a laptop form factor, Microsoft gives developers a stationary platform that can handle long‑running training jobs, agentic pipelines, and local model fine‑tuning.