NVIDIA RTX Spark Leak Points to Two Blackwell GPU Variants With Up to 6,144 CUDA Cores
NVIDIA’s RTX Spark platform is starting to look far more interesting than the initial announcement suggested. When the company first revealed the chipset, it confirmed that the system-on-chip would combine a 20-core CPU with a Blackwell-based GPU, but it left out many of the finer graphics details. Now, information found inside a recent Windows 11 driver package appears to reveal more about the GPU configuration, including CUDA core counts and possible model differences.
According to details uncovered in NVIDIA’s first GeForce driver package for RTX Spark, the platform may arrive in two separate versions. The driver, listed as version 616.00, appears to be a Developer Preview rather than a final public release. Even though it is not meant for regular consumer laptops, the files inside the package provide useful clues about NVIDIA’s upcoming hardware plans.
One of the key discoveries comes from a driver information file named nv_surface_woa.inf. This file reportedly includes references to two configurations under the label “NVIDIA RTX Spark N1X.” The higher-end version appears to feature a Blackwell GPU with 6,144 CUDA cores, while the second version is listed with 5,120 CUDA cores.
If these details are accurate, the more powerful RTX Spark model could pair its 6,144-core GPU with MediaTek’s 20-core CPU. This configuration may also include 48 Streaming Multiprocessors, making it the stronger option for demanding workloads such as AI acceleration, graphics rendering, and advanced gaming features.
The lower-tier RTX Spark variant is expected to use 5,120 CUDA cores and may be paired with an 18-core CPU. It could also feature 40 Streaming Multiprocessors. While this would make it less powerful on paper, it still suggests a highly capable integrated platform, especially for thin-and-light Windows devices or compact systems designed around power efficiency.
One particularly promising detail is memory support. NVIDIA has already stated that RTX Spark can support up to 128GB of LPDDR5X memory. That means buyers may not have to choose the most powerful GPU configuration just to access a large memory pool. For creators, developers, and AI-focused users, high memory capacity could be just as important as raw graphics power.
However, CUDA core count alone does not tell the full performance story. The 6,144-core configuration lines up numerically with some high-performance GeForce-class GPUs, while the 5,120-core version shares a CUDA core count with older but still capable laptop graphics chips. Even so, performance depends on many other factors, including clock speeds, memory bandwidth, power limits, cooling design, driver optimization, and the efficiency of NVIDIA’s Blackwell architecture.
Early signs suggest that RTX Spark could deliver surprisingly strong real-world performance. Previous demonstrations have shown demanding titles such as Alan Wake 2 and PRAGMATA running smoothly on the platform with path tracing enabled. That is a major point of interest because path tracing is one of the most demanding graphics features in modern gaming. If RTX Spark can handle those workloads in a compact and efficient chip design, it could become an important step forward for Windows on Arm devices and AI-ready laptops.
The biggest question now is how NVIDIA and its partners will position RTX Spark products. A Blackwell GPU combined with a high-core-count CPU and support for up to 128GB of LPDDR5X memory could make the platform attractive for several markets. It may appeal to gamers looking for portable performance, creators who need GPU acceleration, developers working with AI models, and professionals who want efficient compute power in a mobile form factor.
For now, NVIDIA has not officially confirmed the full specifications of these two RTX Spark variants. Driver leaks can be accurate, but specifications may still change before launch. Still, the appearance of both 6,144-core and 5,120-core Blackwell GPU configurations strongly suggests that NVIDIA is preparing more than one version of RTX Spark to target different performance and price segments.
If the leaked details hold true, RTX Spark could be one of NVIDIA’s most interesting upcoming platforms. With Blackwell graphics, powerful CPU options, large memory support, and early signs of strong gaming performance, it has the potential to reshape expectations for compact Windows systems and next-generation AI PCs.
