RTX Spark Features Altered Cortex-X925 Cores, Die Analysis Shows Attributes Taken From Dimensity 9400 & Dimensity 9500 Specifically To Tackle PC Workloads

One area of criticism surrounding NVIDIA’s RTX Spark is that its CPU configuration comprises of cores found in MediaTek’s Dimensity 9400, a chipset that’s going to be two generations old in October this year. Naturally, even the 20-core CPU can’t hold its own against modern-day SoCs, but did you know that NVIDIA did some slight tweaking with the Cortex-X925 to make it slightly more capable? A closer look at the RTX Spark shows that the cores take two features from both the Dimensity 9400 and Dimensity 9500 because the silicon needs to take care of demanding PC-related workloads.

New dieshot analysis highlights that the RTX Spark’s Cortex-X925 adopts the same power rail design as the Dimensity 9500 for maintaining high CPU frequencies

Since the RTX Spark is required to put up an incredible display of power and performance to outpace the competition, using the exact same Dimensity 9400’s Cortex-X925 design wasn’t going to cut it. The YouTube channel Geekerwan points out that the CPU cores of the RTX Spark are smaller than the ones found in MediaTek’s previous-generation silicon. However, the interesting bit is that the same cores adopt the power rail design of the Dimensity 9500’s C1-Ultra.

The YouTuber suspects that attributes from both the Dimensity 9400 and Dimensity 9500 were taken and applied to the RTX Spark to enable higher sustained frequencies to take care of the demanding workloads of the PC platform. The highly efficient power distribution and scheduling algorithms of Dimensity 9500 enable NVIDIA’s ARM-based silicon to tackle those intensive multi-core workloads by maintaining its clock speeds.

The advantage here is that the altered Cortex-X925 cores can continue running at their increased frequencies without running into thermal limits, with machines like Microsoft’s Surface Laptop Ultra and its 110W TDP handling the heat generation just fine. There’s no confirmation if some notebook manufacturers can operate at a higher clock speed for these Cortex-X925 cores, so we’ll have to wait for certain benchmarks to come through to make sure.

Overall, this is an interesting decision taken by NVIDIA and demonstrates that a single ARM CPU design can still be tweaked to run in a specific environment. It appears that MediaTek’s collaboration with the graphics processor manufacturer will only become stronger as NVIDIA prepares more advanced versions of the RTX Spark in 2027. During our coverage of Computex 2026, we had some hands-on with the new laptops equipped with NVIDIA’s new SoC, so do check them out.

News Source: Geekerwan

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