The Exynos 2100 is a high-performance processor found in several high-end smartphones, offering power and energy efficiency. However, many users notice that activating the GPS leads to unexpected thermal spikes, even when the applications used are lightweight. This phenomenon is not random: it is directly linked to specific CPU cores that handle location calculations and sensor management, causing a rapid increase in temperature.
The high-performance core responsible for the heat increase
The Exynos 2100 uses a tri-cluster architecture with an ultra-high-performance Cortex-X1 main core, three Cortex-A78 cores, and four energy-efficient Cortex-A55 cores. When a GPS service is active, it is the Cortex-X1 that handles triangulation calculations, sensor fusion, and real-time data processing. This core operates at a frequency of up to 2.9 GHz, generating localized thermal spikes on the smartphone.
Measurements taken with internal thermal sensors show that the temperature around the SoC can increase by 5 to 8 °C in a few minutes, even if the screen is off or no demanding application is used. This phenomenon explains why some devices become warm to the touch despite light use, simply because the GPS is active.
Why aren’t the energy-efficient cores enough to limit the heat?
Although the Exynos 2100 has four low-power Cortex-A55 cores, these cores do not handle heavy GPS calculations. The processor prioritizes the performance of the Cortex-X1 to quickly process location data and ensure optimal accuracy. This distribution is effective for responsiveness but leads to a thermal concentration on the main core, causing spikes even on light tasks.
Performance tests show that when the GPS is active in the background, the Cortex-X1 remains at high frequency for several minutes, while the energy-efficient cores oscillate at low frequency. This dissociation creates a thermal imbalance that can be felt on the surface of some smartphones equipped with the Exynos 2100.
The combined effect of GPS and applications on the overall temperature of the smartphone
GPS is not the only cause: the combination with mapping, real-time tracking, or weather data applications increases the load on the Cortex-X1 core. Even applications that seem undemanding trigger a constant data stream processing, amplifying energy consumption and heat production.
Analyses show that a smartphone with active GPS and an open mapping application can reach a thermal peak of 42 to 45 °C on the SoC, while the screen remains at moderate brightness. This rapid increase explains why some users report slowdowns or overheating notifications despite light use.
How to limit thermal spikes without disabling GPS?
To reduce overheating related to the Cortex-X1, several strategies are possible. The first is to optimize the use of GPS applications in the background by disabling constant synchronization or limiting location services to medium accuracy. Android 14 also offers power-saving mode options that regulate the main core’s frequency during GPS calculations.
Another method is to monitor the temperature via dedicated applications or internal logs and combine these settings with regular GPS breaks when possible. This approach maintains location accuracy while reducing thermal spikes on the Cortex-X1, thus protecting the battery and overall stability of the smartphone.