NVIDIA RTX Spark Launches Friday: 74B-Parameter AI Fits in 24GB Laptop

NVIDIA unveiled its RTX Spark platform built on a Grace CPU and Blackwell GPU superchip with up to 128GB of unified LPDDR5X memory and up to 1 petaFLOP of FP4 AI compute. The Nemotron 3.5 Bolt 74B model uses sparse mixture-of-experts (9B active parameters) and 2-bit quantization-aware training to fit in 24GB. The model releases October 15, with RTX Spark laptops on sale October 16.

• Superchip: up to 20-core Grace CPU, 6,144-core Blackwell GPU, NVLink-C2C at 900 GB/s
• Nemotron 3.5 Bolt 74B: 9B active parameters, 2-bit quantization, 24GB footprint
• Model launches October 15; RTX Spark laptops go on sale October 16
• PAIR reaches general availability, distributing inference across local GPUs