This is why new smartphones get so hot

If you use a high-end Android smartphone, you may have already noticed that it tends to overheat after only a few tens of minutes of use. Unfortunately, it seems that this trend is not going to end.

Galaxy S22 Ultra

Android smartphones are getting more and more powerful, but also more and more popular every year. In 2022, the overheating problems devices equipped with high-end chips Snapdragon 8 Gen 1 or Exynos 2200 have multiplied. During our test Xiaomi 12 Pro 5G, for example, we noticed that the smartphone tended to overheat when pushed to the limit, 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, as we also notice significant heating in the OnePlus 10 Pro or in the Oppo Find X5 Pro. Worse still, remember that Samsung had clamped down on its Exynos 2200 chip to prevent overheating Galaxy S22but finally it was forced to apologize publicly.

Android smartphones overheat, who is responsible?

Industry analysts say that the ARM architecture used in all processors is the cause of performance issues and overheating in a large number of Android devices, including those from Samsung Electronics, Xiaomi, and Motorola that use processors burned by Samsung Electronics. and Qualcomm. Unlike Intel, ARM doesn’t make its own chips.. Rather, the company designs processors and licenses those designs to any interested company.

The last So Snapdragon 8 Gen 1 and Exynos 2200 are for example etched in 4nm by Samsungso what MediaTek’s Dimensity 9000 is recorded by TSMC with a more advanced process. Based on tests of devices using it, the latter is cooler than its competitors, but it still suffers from issues during long gaming sessions.

« The application processors were designed by ARM, the same problems were confirmed in those made by Samsung Electronics and TSMC, so it can be said that the cause is not the manufacturers but the designer. », explains a source close to the founders. So the culprits would not be TSMC and ARM, which make the chips, but rather the ARM cores used in each processor.

As a reminder, the 2022 processors use the new architecture ARM V9, which promised to be 30% faster and consume less power. So a Snapdragon 8 Gen 1 uses for example one ARM Cortex-X2 core for performance, three “big” Cortex-A710 cores, and four “small” Cortex-A510 cores for high-performance workloads. Despite advances in technology, ARM reportedly couldn’t make processors with V9 cores any cooler.

Credit: ARM

Why are iPhones not affected by these heating issues?

For years now, iPhones have always seemed to outperform the best Android smartphones, but iOS devices are much more powerful. 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. “. By comparison, Samsung Electronics and Qualcomm are developing application processors for use in different models from various manufacturers, which means that the architecture is not customized enough for the requirements of each smartphone.

Smartphone makers are aware of overheating issues, and some are already considering changing their strategy to overcome it. Thus, 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 homemade chips a few years from now. This should not only correct overheating issues, but also greatly improve the battery life of the devices as they will benefit from a custom architecture.

If Android smartphone manufacturers continue to work with the same ARM architecture, your next device may not escape the overheating problem. On the contrary, you will have to opt for an iPhone, or a mid-range Android smartphone which uses a less powerful chip.

Source : business korea

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