Yay got my Raspberry Pi cooled. Now the show is on 
Noctua 40mm 5V Fan.
Files: http://www.thingiverse.com/thing:1546839
what workload is sufficient to cook/overheat a Pi? Does OctoPrint demand that much of the device? Did you install additional heat sinks to any of the chips?
@Fred_U Well no octoprint alone does not cook your pi. But when rendering a timelapse with four cores or slicing on the pi (which i dont do) can get it very hot. At least the pi 3 which gets up to 80°C at full load.
Got a aluminiumheatsink on the cpu and the fan as you see. Without both I get up to 60°C while printing with streaming the cam.
Are you worried about 60-80C? Modern processors should be good to what, >100C?
@Ryan_Carlyle um no iam not. But still the raspberry pi clocks down at 80deg. So thats the first fact. Second is it gets unstable for long runtime periods. So after a few days on at 50deg causes it to crash while several weeks at 30deg it wont. Got boinc running on a pi3 and i made the experience. Maybe its the memory who knows. But it also cools the memory a bit and so on.
Cool, that makes sense.