Pi3 and heatsinks

[popcornmix]

@macca

This may be a simple question, but would you class running OSMC as ‘intensive’?Many thanks

Depends exactly on what you are doing. It’s the arm being busy that raises the temperature, especially with multiple cores and when using NEON code.
Software video decode is “intensive” (espically HEVC) and I would suggest a heatsink is beneficial. Hardware video decode is more efficient (low arm use) and so a heatsink is less critical.