Over the past week of running benchmarks on the Raspberry Pi 3 we have seen how warm this new $35 quad-core ARM 64-bit developer board can get and it’s significantly hotter than the Raspberry Pi 2.
Some have claimed their Raspberry Pi 3 SBCs even get hotter than 100C under load, but I haven’t seen quite that extreme with my peak during monitoring being 80~90C. While raspi-config currently doesn’t allow overclocking on the Raspberry Pi 3, if you were to OC this quad-core Cortex-A53 SoC you would certainly want at least a passive heatsink if not an active cooler.