I have just powered up and updated my BBAI one hour after delivery of same. 
 The board shut down at 95 degC, which it reached within fifteen minutes of 
power-up!
After waiting for cool down and restarting, I upgraded all the software as 
advised, by blowing on the heatsink during the process.
When finished, I ran 'top' command and the board shut down after 10 minutes 
- reaching 80 deg C.
I restarted again as before without running a command and the board shut 
down on over-temperature again with only the standard processes running - 
no user commands.

The unit obviously needs a fan - something not  mentioned in the 
literature.  A fan cape is purchasable for about $35, but really ???
 I would not have bought the board had I known, since it was destined to 
become part of a remote and unattended SDR (Radio Receiver)
and fans are a no-no.
This does not seem to be a software or firmware fault - it is a design 
issue - and the board should be sold with fan, as it is not fit for purpose 
as-is.
Very disappointed, as I have sunk further cost because I bought a cape for 
the thing - which is yet to arrive.
Gah!!!
On Wednesday, November 6, 2019 at 9:11:47 AM UTC+8 [email protected] 
wrote:

> Several people upgraded OS, then processor temperature speed slow down 
> stops working and processor overheats. 
>
> For full speed operation, several people have reported using a fan, 
> particularly small 25 mm square fan mounted on heatsink, works.
>
> Other suggestion, huge heat-sink for fanless.
>
> On Tuesday, 5 November 2019 19:08:25 UTC, Nicholas Talbot wrote:
>>
>> I have noticed that my just purchased beaglebone AI is overheating and 
>> shutting down.  The heatsink does in fact get quite hot.  I get a message 
>> like:
>>
>> Message from syslogd@beaglebone at Nov  1 14:57:00 ...
>>  kernel:[ 1219.684296] thermal thermal_zone0: critical temperature 
>> reached (95 C), shutting down
>>
>> Is there any update to fix this?  Maybe I got a bad chip?
>>
>

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