Smartphone Thermal Limits Hit Wall as Cooling Struggles With SoC Power Draw

Smartphone cooling solutions struggle to keep up with increasing SoC power draw. iPhone 17 Pro Max throttles, while Apple, Qualcomm, and Samsung pursue different thermal management strategies.

By Bartosz Mazur

Published May 20, 2026 3:05 PM

Smartphone Thermal Limits Hit Wall as Cooling Struggles With SoC Power Draw

Smartphone cooling solutions are struggling to keep up with increasing SoC power draw. The iPhone 17 Pro Max with A19 Pro shows thermal throttling in the 3DMark Wild Life Extreme Stress Test. Smartphone chassis can only dissipate about 6W of heat before becoming uncomfortable.

Apple's A19 Pro efficiency cores lead

Apple focuses on efficiency cores. The A19 Pro efficiency cores show up to 29% performance increase with similar power draw compared to the A18 Pro. Qualcomm's Snapdragon 8 Elite Gen 6 Pro is rumored to reach 5.00GHz, increasing power draw. Samsung's Exynos 2600 uses a Heat Pass Block with a copper heatsink over the die. Samsung is developing side-by-side cooling for the Exynos 2700, boosting memory bandwidth by 30-40%.

A19 Pro efficiency cores deliver 29% performance increase over A18 Pro — Apple's A19 Pro efficiency cores show significant performance gains.

REDMAGIC uses active fans and watercooling to cool the Snapdragon 8 Elite Gen 5. The Exynos 2600 has touched 30W of peak power when stressed, according to a separate article.

WCCFTech reported the A19 Pro efficiency core performance and the Snapdragon 8 Elite Gen 6 Pro frequency rumor. A Reddit user provided additional information. The exact launch window for these chips remains unconfirmed by the vendors.