hi all . when sysbench --test=cpu --cpu-max-prime=200000 run --num-threads=8 case 1) fan from upper , CPU temperature is 85 ~ 86 degree case 2) fan from lateral side , CPU temperature is 75 ~ 76 degree ----------------- without fan Fri Jul 22 11:42:19 JST 2016 58 start lateral side fun Fri Jul 22 11:47:39 JST 2016 41 lateral is much better https://2.bp.blogspot.com/-Z2V8ksx1s2E/V5Ftt5tqwsI/AAAAAAAABOg/BAoKx-qeJ... ---------------- my japanese page is http://akita-8core.blogspot.jp/2016/06/nano-pi-m3.html