According to latest leak, an online image shows that the Apple iPhone 17 Pro and Pro Max will feature vapor chamber cooling. This technology is much better than the graphite pastes and the upcoming one has copper thermal paste which is better for dissipating heat that is coming from the inside.

When doing heavy CPU or GPU intensive tasks, the plate would absorb the heat and dissipate and it would turn back to liquid later on. Looks like A19 Pro chip is going to break some more records and we believe it will be pro-exclusive.
Samsung and Asus has been using this technology in their phones from quite some time but then their chips are not as efficient as Apple, requiring better cooling tech inside. The iPhone 17 Pro and Pro Max will be first smartphones from Apple to have vapor chamber cooling tech. Apple will be launching its 17 lineup in the month of September.
Along with vapor chamber cooling, the iPhone 17 will also feature 50W wireless charging, which is also first in the world of Apple smartphones.