There are some heatsinks for the Raspberry Pi and I wanted to evaluate if I need one.
So I decided to take some thermal images of it under typical load. I used my FLIR camera. Here are the first results.
After 10min in idle mode (96% idle): 39°C CPU temperature
After 50min in idle mode (96% idle): 42.4°C CPU temperature
The hottest spot is not the CPU, but the companion chip.
In the next days I will post some thermal images of the Rasp.Pi working under heavy load.
Here is the stress test thermal shot: Link