Overheating Mecool M8s Pro L and Pro + (and others ?) - Options ???

[ehoser]

Check out the heat sink on the Minix box:

[P.X]

That's more like it

[Jancales]

Check out the heat sink on the Minix box:

And it has 2mm thick Thermal pad, not adhesive or whatever

[P.X]

And it has 2mm thick Thermal pad, not adhesive or whatever

Oh dear, give with one hand and take away with the other.

Pads are much worse than epoxy or good glue.
Graph in Post 1 shows my test gives 11°C poorer than thermal paste.

Would be nice to see your comparison if possible, pad vs paste ???

[Jancales]

Oh dear, give with one hand and take away with the other.

Pads are much worse than epoxy or good glue.
Graph in Post 1 shows my test gives 11°C poorer than thermal paste.

Would be nice to see your comparison if possible, pad vs paste ???

I tested it long time ago, never reached 50°C even after hours of playing movie.

It's S812 soc .

If I have time I will test again.

[P.X]

I tested it long time ago, never reached 50°C even after hours of playing movie.

It's S812 soc .

If I have time I will test again.

Thanks.
Maybe better, thinner pads are closer to paste??
Some data

https://en.m.wikipedia.org/wiki/Thermal_conductivity#/media/File%3AThermal_conductivity.svg

[P.X]

38mm Hole Saw - Centre on M8S Pro +

Great for the 40x40x11mm Heatsink (28x28x20 still works better by ~3-4°C due to chimney effect at a guess)

[P.X]

+ The Pro L

M8S Pro Cool Family

[P.X]

Video - Passive Options Review

https://youtu.be/EPVf57H3les

[mirbg]

This is my solution of the problem with the heat:

40x40x10mm Evercool fan on 5V , connected on the back of the USB:






Results:

Original HS - max temp with StressCPU- 82C
40x40x11 Aluminium HS with lifted lid about 2mm - 80C
40x40x10mm fan on 5V with modded lid cover (30 holes) and stock HS - 67C
40x40x10mm fan on 5V with modded lid cover and stock HS - 57C
40x40x10mm fan on 5V with modded and lifted lid about 2mm and stock HS - 53C

The box is practically noiseless, absolutely quiet with this fan.

[P.X]

Yep, that'll sort out any heat issues

[wimpie007]

Stock heatsink, 30mm hole, with 12v fan running on top (running on 3.3v) 50 degrees when watching netflix HD.
The fan 'sucks' air out of the device, instead of blowing it in.

[P.X]

Stock heatsink, 30mm hole, with 12v fan running on top (running on 3.3v) 50 degrees when watching netflix HD.
The fan 'sucks' air out of the device, instead of blowing it in.

Yes, that works too

I found you can fit some inside with the std. HS and a small lift of the lid.
Are you sure it is 12V ? Most won't run at 3.3V, but will if rated at 5V.

[wimpie007]

i was to lazy to cut out a square, so i just done the 30mm round one. (drill it out)
Yips, it is a 12v, was surprised myself it would run on 3.3! couldnt find a 5 volt source inside... now, it is connected on the UART pins.

[mirbg]

Yes, that works too

I found you can fit some inside with the std. HS and a small lift of the lid.
Are you sure it is 12V ? Most won't run at 3.3V, but will if rated at 5V.

Fan inside with lifted lid will hardly make any noticeable difference - in my case the temps went down from 80 to 74C degrees. It just needs more fresh air from outside...