iPhone 14 updated internal design delivers better thermal efficiency ?

October 11, 2022

The iPhone 14 was released, and we noticed a change: An updated internal design delivers better thermal efficiency. This is a small change, but it has attracted the attention of the majority of iPhone fans. If I remember correctly, this is the first time Apple has mentioned "heat dissipation" on an iPhone.

As we all know, previous generations of iPhones did not use heat dissipation materials. Not to mention high-end heat dissipation technologies such as VC vapor chambers and phase change thermally Interface materials (TIMs), even the cheapest graphite heat sinks are useless. This leads to the fact that although the A-series chips can score very high, they do not have a better gaming experience.

In addition, since the iPhone X, in addition to the XR and SE, the full-screen iPhone adopts a double-layer motherboard structure. The double-layer motherboard sandwiches the IC in the middle, which makes the IC easy to accumulate heat, and the frequency of heat reduction becomes commonplace.

iPhone 14 updated internal design delivers better thermal efficiency, what exactly has it done?

iPhone 14 updated internal design delivers better thermal efficiency

iPhone 14 disassembly: adding an aluminum plate.

Disassemble the iPhone 14 and check the internal structure inside. It turns out that the "thermal efficiency" of the iPhone 14 is just an "aluminum baffle" between the screen and the motherboard. The area of this aluminum plate is very large, and it is integrally formed with the middle frame of the fuselage, which is expected to have the effect of heat conduction.

From the iPhone 14 structure, it should be a large aluminum plate with strong thermal conductivity to conduct the heat of the screen and the motherboard to the aluminum alloy middle frame, and then volatilize through the air. On the other hand, the iPhone 14 Pro has no aluminum plate, but a graphite heat dissipation film. Because the iPhone 14 Pro has a stainless steel middle frame, and the thermal conductivity of stainless steel is much lower than that of aluminum alloys. Even if the iPhone 14 Pro uses the same aluminum plate design, it won't work very well.

iPhone 14 disassembly adding an aluminum plate

Does the new design improve performance?

The iPhone 13 and iPhone 14 are also 6.1 inch models with the same A15 chip, which are tested by games. The results of the test data are: the average frame rate of the iPhone 14 is 57.5 fps, while the iPhone 13 is 55.5 fps, and the score is slightly improved.

As for the average power consumption, it has increased from 3.5W to 3.8W. It can be understood in this way that after thermal optimization, the performance release capacity of the iPhone 14 during gaming has been increased by 0.3W. In the 3D Mark stability test, in the same comparison, the stability of the iPhone 14 is 77.2%, and the stability of the iPhone 13 is 65.5%. It seems that the effect brought by the aluminum plate is immediate.

iphone heat dissipation frame rate and power consumption

iphone heat dissipation stability test

Most importantly, you will also find that the thermally optimized iPhone 14 has better sustained performance than the 6.7 inch iPhone 13 Pro Max. As for the larger-screen iPhone 14 Plus, it's only going to be better. By improving heat dissipation, it can also bring better continuous performance release capability, and truly improve the user experience. To sum up, I think the iPhone 14 has a big improvement in heat dissipation



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