First of All, Tame the roaming beast, BBB AI.

11 Oct 2019

Just got the BBB AI, But one should

Tame the roaming beast first.

Unlike normal BeagleBone_xx I used before, the BBB AI is one beast, roaming and heating instantly, then overheat tohalt.

But I like it. I know that is just what I want, as Nvidia GPU has done.

I am pretty sure TI is always good at performance balance, that is what TI can do at best. I would prepare to drive the BBB AI into water if neccessary.

I find one 80x80 CPU cooling fan now, it works fine. Of course, 25x25mm cooling fan would be better, I would place order.

But another problem comes, Tensorflow is only supported on 64bit OS. Unlike Raspberry Pi 3B+ and later which is 64bit compatible.

I shall find way out.

--------------------------

The 25x25x10 axis Fan arrives.

Looks OK, but I think it is WRONG ANSWER.

Why? Whatever the namerating of airflow or capacity, the center part is covered by the motor.

The test result proves my assumption. The BB-ai can work continuously even in heavy burden, but the temperature is obviously higher than my first ugly configuration. I think one Extention board BB AI cooling Addon board available by mayermakes would be more practical choice.

The rim of fan blade offers more air flow. In this small 25x25 fan, the performance is poor.

I do not need quite CPU fan, but one noisy strong blow.

Top Comments

clem57 over 3 years ago in reply to dubbie

I would venture flow into so the dust gets blown away too.
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dubbie over 3 years ago in reply to mayermakes

Do you know whether it is best to have the fan blow onto the chip to cool, or to suck air away from the chip to cool. I now have the small fan (Thank you tariq.ahmad) and I wasn't sure which was best.

Dubbie
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mayermakes over 3 years ago

Hi in the meantime I have assembled and tested the first 0 batch of my BB-AI-Cooler addon board. and it works fine. I use it in a project to be seen on element14presents where the board is enclosed in a tight case with a lot of other electronics and only two thumb size holes to transport the air. the 25mm fan is nearly silent(depending on the load it starts a high pitched sound sometimes) the temperatures are reasonable at Kernel R119 and even with PRU cores DSP EVE, serial com to an MCU and Opencv-python running on the main arm core at once it still performs within its limits.
So I can confirm the 25mm fan beaglebone recommended is sufficient but I prfer to mount in on my addonboard to allow for a bigger volume of air to be flown over the heatsink compared to mounting it directly onto the heatsink.
I Could not test the pwm/banBangcontrols for the fan because I was not able to get the GPIOs working with anything other than PRU,but this issue may be shortly resolve as Device tree overlays get released.
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shabaz over 3 years ago in reply to clem57

Hi Clem,
I will do at some stage, but right now I have some other things I want to do with BB-AI, i.e. I'm in the zone! : )
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clem57 over 3 years ago in reply to shabaz

shabaz take a look at OpenCL v 1.1. It can exercise the cores and more.
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