NVIDIA RTX Spark: 1 Petaflop AI Chip Coming to Windows PCs
3 min readNVIDIA and Microsoft used Computex 2026 to introduce RTX Spark, a new superchip the two companies say will redefine what a Windows PC is in the age of personal AI agents. The chip delivers one petaflop of AI performance on a single device, enough to run frontier-class models locally instead of routing every prompt to the cloud.
What RTX Spark Is
RTX Spark fuses a Blackwell RTX GPU with 6,144 CUDA cores and fifth-generation Tensor Cores to a 20-core NVIDIA Grace CPU, co-designed with MediaTek and linked over NVLink-C2C. The system supports up to 128GB of unified memory, which lets a single laptop or compact desktop hold a 120-billion-parameter model with a one-million-token context window in working memory at the same time.
That memory footprint is the key change. Today’s consumer GPUs can run small distilled models locally, but anything close to the size of a real frontier model has to be split across multiple cards or shipped off to a data center. With Spark, NVIDIA is targeting that class of workload on a PC.
A New Windows Layer for Agents
The hardware ships alongside a software piece NVIDIA is calling OpenShell, a runtime built with Microsoft that lets AI agents read the screen, take actions, and call models locally while staying under user control. New Windows security primitives are designed to keep an agent’s permissions narrow, so that giving an assistant access to your files does not mean handing it the whole machine.
Microsoft says the goal is to move agents from a tool you open to a teammate that lives on the device. The two companies framed Spark PCs as the first Windows hardware built for that pattern rather than retrofitted for it, per the Windows Experience Blog.
Why It Matters
Cloud inference is expensive and leaves a data trail. Running a competent agent locally cuts both costs, and it opens up offline use cases that a cloud assistant cannot serve. For developers, a 128GB unified memory pool also means more model experimentation can happen on a laptop and less on rented H100s.
RTX Spark laptops and small desktops are slated to ship this fall from ASUS, Dell, HP, Lenovo, Microsoft Surface, and MSI, with Acer and GIGABYTE following. Pricing has not been announced. The first real test will be whether the early Windows agent experiences feel materially faster and more useful than what RTX 50-series PCs already deliver.