Nvidia RTX Spark: 1-Petaflop Superchip Brings Local AI Agents to Windows PCs

Nvidia today announced RTX Spark, a new superchip that brings 1 petaflop of AI compute to Windows PCs, purpose-built for running personal AI agents locally. The chip combines a Blackwell RTX GPU (6,144 CUDA cores, fifth-gen Tensor Cores with FP4), a 20-core Grace CPU, and up to 128GB of unified memory, connected via NVLink-C2C. MediaTek contributed to the custom Arm-based CPU design for power efficiency.

Key Specs and Capabilities

• AI performance: 1 petaflop (FP4)
• GPU: Blackwell RTX with 6,144 CUDA cores
• CPU: 20-core NVIDIA Grace (Arm), co-designed with MediaTek
• Memory: up to 128GB unified memory
• Software stack: CUDA, RTX, DLSS, FP4, TensorRT, OptiX, Reflex, G-SYNC

RTX Spark can run 120B-parameter LLMs with up to 1 million tokens context locally, render 90GB+ 3D scenes, edit 12K 4:2:2 video, generate 4K AI video, and play AAA games at 1440p 100+ fps.

Windows-Native Agent Security

Nvidia and Microsoft are collaborating on new Windows security primitives and the Nvidia OpenShell runtime to enable secure on-device agents. The security layer provides identity, containment, policy, and end-to-end security. OpenShell adds user-defined policies for agent capabilities, intelligent query routing to local vs. cloud models, and PII masking in cloud-bound queries.

Agent frameworks including Hermes Agent and OpenClaw are building Windows apps on this stack, enabling cross-app workflows, file search, image/video generation, and code plugin creation.

Availability

RTX Spark-powered slim laptops (all-day battery, premium displays) and compact desktops will ship this fall from ASUS, Dell, HP, Lenovo, Microsoft Surface, and MSI, with Acer and GIGABYTE models to follow.