The board gets quite hot and the Omap4430 reaches about 80ºC at heavy load with a room temperature of 20ºC. The processor's thermal specs are: TJmax = 105°C and TBmax = 85°C.
Every change in the CPU load showed up almost inmediatly on the thermal camera. We tracked the heat of the hotspots to see the evolution graphically.
Here is a video of the heating up process.
This can be seen in this video of the thermography of a small pasive heatsink attached to the processor.
Here is a 20 min. long video of the entire heating up process of the board
I have to test this hint to read the internal temperature:
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