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Beaglebone Ai Heating Issues

ipv1

While experimenting with the device, I found that the board would shutdown without warning. The reasons is...

 

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Now I tried a number of combos like us the USB tether, connect with display(yes I have the cursed microHDMI cable) and use standalone but every time, it just overheats if I do anything.

 

Idle temps are high too. Was wondering if I got a bad board or is it everyone?

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  • Hi ,

     

    I  looked into this and this is a known issue:

     

    BeagleBoneRegistered AI - Frequently Asked Questions (FAQ)

     

    They recommend adding a larger heat sink and cooling via fan.   

  • in reply to tariq.ahmad

    My investigations showed much the same. My questions are:

     

    1. How was this not caught during testing ? Some minor overheating might be missed but shutting down as described on many of the comments makes it obvious that there is a serious problem.

    2. This is happening when you are only running the OS on the ARM Cortex-A15 cores.  What happens to the temperature when you start using some mixture or all of the ARM Cortex-M4s cores,

          DSPs, EVEs and PRUs too?

    3. If it needs a bigger heat sink and fan just running the OS why doesn't it HAVE a bigger heat sink and fan (see 2.).

     

    After reading the earlier comments in this discussion and checking for other comments on the web I hopped over to Ebay and bought a couple of 25mm fans. The heat sink on the AI is 25mm and

    it looks like there are threaded holes to attach the fan with. I'm not sure how you mount a larger heat sink  other than a adhesive thermal pad or thermal epoxy. There is an adhesive thermal pad

    between the heat sink and SoC but I'm not a big fan of thermal pads and in this case I would much rather have a heat sink that uses mount points on the PCB and a wafer thin layer of quality thermal

    paste.

     

    It also looks like it could use some serious thermal management on the OS side. I'll give them the benefit of the doubt and hope that somebody is looking into this.

  • in reply to gdstew

    Mainly active cooling helps to reduce the temperatures when it's under load.

     

    There may be some work that can be done with cpufreq under linux to help thermal throttling, though this is at least possible to manage the board to reduce the speed down to 500mhz from the 1.5Ghz.

  • in reply to gdstew

    The heat issue was found during testing.  See section 3.1 from the following:

    https://github.com/beagleboard/beaglebone-ai/wiki/System-Reference-Manual

     

    "You may find it helpful to connect a fan to BeagleBoneRegistered AI. This one has been used by Alpha testers."

     

     

    There is also a link for the Heatsink.

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