This is why new smartphones heat up so much

If you’re using a high-end Android smartphone, you might have noticed that it tends to overheat after just a few tens of minutes of use. Unfortunately, it looks like this trend will not end.

Android smartphones are getting more and more powerful every year, but they are also getting hotter. In 2022 the overheating problems Devices with high-end Snapdragon 8 Gen 1 or Exynos 2200 chips have multiplied. For example, during our review of the Xiaomi 12 Pro 5G, we noticed that the smartphone tends to overheat at its limits, but this problem seems to affect all high-end Android smartphones on the market.

In fact, Xiaomi is far from the only one affected by this problem, since we had also noticed significant heating on the OnePlus 10 Pro or on the Oppo Find X5 Pro. Even worse, remember that Samsung had clamped its Exynos 2200 chip to avoid heating his Galaxy S22, but eventually had to apologize publicly.

Android smartphones overheat, who is to blame?

Industry analysts say that the ARM architecture used on all processors is at the root of performance issues and overheating in a large number of Android devices, including those from Samsung Electronics, Xiaomi, and Motorola that use burned-out Samsung Electronics and Qualcomm processors. Unlike Intel, ARM does not manufacture its own chips. Rather, the company designs processors and licenses those designs to any interested company.

The last Snapdragon 8 Gen 1 and Exynos 2200 are therefore engraved in 4 nm by Samsung, for exampleduring MediaTek’s Dimensity 9000 is engraved by TSMC with a more advanced process. According to the tests of the devices that use it, the latter is cooler than its competitors but still suffers from problems during long gaming sessions.

Application processors were developed by ARM, the same problems have been confirmed in those manufactured by Samsung Electronics and TSMC, so it can be said that the cause lies not with the manufacturers, but with the designer », Explains a source close to the founders. So the culprits would not be TSMC and ARM making the chips, but the ARM cores used in each processor.

As a reminder, the processors of 2022 will use the new ARM V9 architecture, which promised to be 30% faster while consuming less energy. For example, a Snapdragon uses 8 Gen 1 an ARM Cortex-X2 core for performance, three “big” Cortex-A710 cores and four “small” Cortex-A510 cores for high-performance workloads. Despite technological advances, ARM has reportedly failed to make processors with V9 cores cooler.

Photo credit: ARM

Why aren’t iPhones affected by these heating issues?

For years, iPhones have always seemed to run cooler than the best Android smartphones, but iOS devices are far more capable. To achieve such results, the source explains thatApple has managed to optimize the ARM architecture better than its competitors.

iPhones are also based on ARM’s chip design, but Apple and ARM are adapting the processors for use in iOS “. In comparison, Samsung Electronics and Qualcomm are developing application processors for use in different models from several manufacturers, which means that the architecture is not personalized enough for the needs of each smartphone.

Smartphone manufacturers are well aware of the overheating issues, and some are already considering changing their strategy to overcome them. For example, we had seen that Samsung was considering following in Apple’s footsteps and designing its own SoC, and Oppo could also equip its smartphones with its home-made chips within a few years. In addition to solving overheating problems, this should significantly improve the autonomy of the devices, since they benefit from a personalized architecture.

If Android smartphone makers continue to work with the same ARM architecture, your next device might not be spared from the overheating problem. Otherwise, It will be necessary to opt for an iPhone or a mid-range Android smartphone which uses a less powerful chip.

Source: Business Korea

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