HeatSink for Orange Pi (Need help)

[yogesh]

Even applying thermal patch cpu temperature stays at 80+C  which initiates core shutdown.

 

Currently I am on armbian 5.04 and ambient temperature is 33C which may go upto 45.

 

I am working on video streams with OP that consumes lots of CPU and other resource which triggers temperature.

 

Planning to stream from moving vehicle (OP will be fitted in moving vehicle).

 

Please help/guide me to select heat sink which should accept some vibrations and jerks from vehicle.

 

Note : OP don't have provision like screw hole or attachment for heat sink.

 

Thanks,

Yogesh

[technik007_cz]

EDIT: I found in dmesg "Killed process 4867 (stress)", so problem is probably low memory related

 

Hi guys,

 

I sticked alu heatsink 20x21x15[mm] with thermal cement (links below) and I have 70C under 100% cpu load with 4 cores on.

My board is Orange Pi mini 2 and I put it in clear plastic box without added top plastic (roof), so it is better ventilated.

But system sends messages about high temperature when it reaches 69-70C.

And last thing is when I was running mythtv's (dvbt recorder) mysql database it was unstable and it everytime ended in corrupted tables and sent mysql down.

 

And this is output of stress test:

 

stress: info: [2730] dispatching hogs: 4 cpu, 0 io, 4 vm, 0 hdd
stress: FAIL: [2730] (416) <-- worker 2734 got signal 9
stress: WARN: [2730] (418) now reaping child worker processes
stress: FAIL: [2730] (422) kill error: No such process
stress: FAIL: [2730] (416) <-- worker 2732 got signal 9
stress: WARN: [2730] (418) now reaping child worker processes
stress: FAIL: [2730] (422) kill error: No such process
stress: FAIL: [2730] (416) <-- worker 2736 got signal 9
stress: WARN: [2730] (418) now reaping child worker processes
stress: FAIL: [2730] (422) kill error: No such process
stress: FAIL: [2730] (416) <-- worker 2738 got signal 9
stress: WARN: [2730] (418) now reaping child worker processes
stress: FAIL: [2730] (422) kill error: No such process

 

http://www.aliexpress.com/item/Free-Shipping-10PCS-electronic-radiator-aluminum-module-heatsink-size-20-21-15mm/32559733208.html

http://www.aliexpress.com/item/Free-Shipping-5-pcs-lot-5g-GD9980-Thermally-Conductive-Adhesive-Glue-Heatsink-Plaster-Thermal-Grease-Compound/1964728700.html

 

I think it is clear it need active cooling or edit cpufreq daemon to keep cpu on lower frequency.

With example below temp is about 53C.

 

nano /etc/init.d/cpufrequtils

 

ENABLE=true
MIN_SPEED=480000
MAX_SPEED=960000
GOVERNOR=interactive
 

[Gravelrash]

The best advice i can give to anyone around physical cooling of a chipset is the following.

 

1 always have good unimpeded airflow around your device.

2 dont stick it near or on another heat source if you are passively cooling

3 use copper heatsinks with good quality thermal cement / glue, if copper heatsinks are not an option, look for a heatsink with good surface area, ie tall and   lots of fins.

4 if you are still running at what you perceive to be too hot, then look to add a fan to extract the hot air away from your device.

 

copper heatsinks like this are always good

http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xrpi+copper+heatsink.TRS0&_nkw=rpi+copper+heatsink&_sacat=0