I have a few h265-encoded videos, and of course, the RPi 3 has a hard time playing them. Even though this is not recommended, I overclocked it a bit with the following parameters in /flash/config.txt:
#force_turbo=1 #Voids Warranty! (uncomment to avoid CPU scaling down to 600Mhz)
#boot_delay=1 #helps to avoid sdcard corruption when force_turbo is enabled.
#sdram_freq=500 #uncomment to test. Works only with some boards.
For testing purposes, I played one 1080p / hevc encoded movie in a loop, for hours. It didn't crash, but stutters frequently. I read somewhere that the CPU throttled down if the temperature goes above 80. Indeed, the CPU temperature is very high
vcgencmd measure_temp command returns anywhere from 80 to 84.9'C during playback.
The RPi 3 currently sits in the aluminum Flirc Kodi case.
How would I install additional cooling to avoid throttling while playing h265 files?