Introduction
In October 2025, Intel held a product launch event at its Arizona wafer fabrication facility, officially introducing the third-generation Core Ultra processors based on the 18A process, codenamed “Panther Lake.”
During the core power efficiency demonstration at the event, we noticed that Intel used the ChargerLAB POWER-Z KM003C as the power measurement tool, providing accurate data support for the efficiency comparison across different processor generations.
The demonstration was based on a heavy office workload scenario, where Intel set up three laptops powered by Lunar Lake, Arrow Lake, and Panther Lake processors, each running multiple applications simultaneously. Real-time power consumption data collected by the KM003C revealed significant efficiency differences among the three systems:
- Panther Lake system: stable at 6.8–9.4W
- Lunar Lake system: stable at 7.4–8.7W
- Arrow Lake system: stable at 10.5–11.6W
In the daily office workload demo—which included a video conference, online video playback, and simultaneous use of Office applications—both Panther Lake and Lunar Lake primarily utilized their Low Power Efficiency (LPE) cores, unlike Arrow Lake, which relied on high-performance cores. As a result, the overall system power consumption of Panther Lake matched that of Lunar Lake while remaining significantly lower than Arrow Lake. (Data source: Geekerwan)
More information is expected to be revealed at CES early next year, where Intel may announce the detailed specifications and performance metrics of the Core Ultra 3rd Gen Panther Lake processors.
Summary of ChargerLAB
The remarkable efficiency improvements demonstrated through the ChargerLAB POWER-Z KM003C Tester at this Intel event highlight the potential for even better power performance in future devices. POWER-Z will continue to advance its testing technologies, providing stronger support for industry-wide innovation and technical evolution.
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