Originally Posted by Fake_William_Shatner
Really they should't have the "A5X chip" in the title -- when it's quickly concluded that the added heat is mostly due to the higher resolution screen.
I don't think so. Look at the table at the beginning of this thread.
At idle, iPad 3 is 1 degree warmer than iPad 1 or 2.
Web browsing, iPad 3 is 3 degrees warmer than iPad 1 or 2.
Watching a YouTube video, iPad 3 is 4 degrees warmer than iPad 1 or 2.
Playing Infiniti Blade, iPad 3 is 4-9 degrees warmer than iPad 1 or 2.
The amount of heat generated by the screen is likely the same in all of those cases (the screen's heat is mostly from the backlight). The harder you stress the CPU and GPU, the more the iPad 3 gains on the earlier versions. That suggests pretty strongly that it's mostly the CPU/GPU which accounts for the difference. Also, note that on Infinity Blade, the iPad 2 is considerably warmer than iPad 1. The screens are the same, but the CPU/GPUs are different - once again confirming that it's the CPU/GPU that accounts for the difference.
Now, it is true that the higher resolution screen is the reason for the faster GPU, but it's the GPU generating the heat, not the screen.