And a few final words for those thinking about number crunching, clustering or any other high performance stuff and putting their device into an enclosure. Do you remember the 68°C from before when running the cpuminer benchmark with a small fan blowing air over the cheap heatsink? It get's even better:
![[Image: Bildschirmfoto%202016-03-16%20um%2012.49.56.png]](http://kaiser-edv.de/tmp/4U4tkD/Bildschirmfoto%202016-03-16%20um%2012.49.56.png)
64/65°C in the beginning dropping down to 62/63°C after using two more stripes of adhesive tape to prevent unwanted ventilation to the sides. I used now a larger fan and control the airflow much more. This 'enclosure' is not just beautiful but also highly efficient when it's about improving heat dissipation:
![[Image: Pine64_Heatpipe_deluxe.jpg]](http://kaiser-edv.de/tmp/4U4tkD/Pine64_Heatpipe_deluxe.jpg)
I hope you get the idea. When you use a large fan mounted on the bottom of an enclosure containing 5 boards and you do enclosure design well then you take care about controlling the airflow so that as much air as possible 'hits' the heatsink's surfaces.
While I doubt that enclosure makers will ever get the idea to let convection jump in (mount everything vertically -- use large heatsinks) and that airflow is the most important factor for today's SBCs/SoCs if they should perform constantly under high load at least I will build one the next time for this sort of tests. A 120mm fan mounted vibration free is almost silent and more efficient than annoying smaller ones. And performance improves since throttling starts later and when no throttling is involved for reasons I still don't understand absolutely performance also increases with lesser temperatures:
3440 khashes/sec when running 5°C hotter compared to an average 3490:
![[Image: Bildschirmfoto%202016-03-16%20um%2013.05.50.png]](http://kaiser-edv.de/tmp/4U4tkD/Bildschirmfoto%202016-03-16%20um%2013.05.50.png)
64/65°C in the beginning dropping down to 62/63°C after using two more stripes of adhesive tape to prevent unwanted ventilation to the sides. I used now a larger fan and control the airflow much more. This 'enclosure' is not just beautiful but also highly efficient when it's about improving heat dissipation:
I hope you get the idea. When you use a large fan mounted on the bottom of an enclosure containing 5 boards and you do enclosure design well then you take care about controlling the airflow so that as much air as possible 'hits' the heatsink's surfaces.
While I doubt that enclosure makers will ever get the idea to let convection jump in (mount everything vertically -- use large heatsinks) and that airflow is the most important factor for today's SBCs/SoCs if they should perform constantly under high load at least I will build one the next time for this sort of tests. A 120mm fan mounted vibration free is almost silent and more efficient than annoying smaller ones. And performance improves since throttling starts later and when no throttling is involved for reasons I still don't understand absolutely performance also increases with lesser temperatures:
3440 khashes/sec when running 5°C hotter compared to an average 3490: