[DISCUSSION] Fans/Heatsinks/CPU Cooling Mods

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User avatar
PARKER
Posts: 16
Joined: Fri May 06, 2016 10:42 am

Wed May 18, 2016 10:01 pm

Did some benchmarks and stress testing, take off the faceplates, turn it over as the cpu is on the bottom not the top and get some copper heatsinks to attach.
https://youtu.be/XGjLYezHU10

User avatar
LatteROFLCOPTER
Posts: 45
Joined: Mon May 16, 2016 6:00 am

Wed May 18, 2016 11:28 pm

I'm quite surprised by your temps, my idle temps are around 45c and max 85c without changing anything, no fans or added heatsinks.

Ambient temp of 27c.

When I turn on a fan it drops to 34c idle and still 85c max.
But it sits between 50-60 while playing 4k hevc content (as a test).

Regarding games, yeah it's not designed for games, even the Intel Core M will do better.
Though I have it running Morrowind at an acceptable level (even when using graphics mods).
Torchlight 2 also runs acceptable.

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Delphium
Posts: 20
Joined: Mon Apr 18, 2016 3:20 pm

Thu May 19, 2016 9:33 am

PARKER wrote:https://youtu.be/XGjLYezHU10

Managed to get the cpu to drop by 10 / 15c see vid above
Thanks for posting, although I do have a couple of questions.

From what I can see in the video, you have placed the heatsink block onto the eMMC (hard drive) and RAM, but I did not spot one mounted on the actual CPU itself.

Did you test this with a block on the actual CPU? Despite the board not being able to lay flat or such, id still be interested in the performance gains of connecting the heatsink to the CPU rather than the eMMC or RAM chips.

Also FYI, the "plaster" piece of material that you removed at 3:22 in the video is thermal compound tape which helps to transfer heat from the CPU to the metal case/heat spreader covering the CPU and couple of other chips.
In your video you described this being a heat insulator/heat resistive (preventing the spread of heat) rather than what it correctly is, which is a heat conductor (helping to transfer heat to the metal case).

I had already purchased some heat sinks and fans before watching this video, and they arrived this morning.
I am however seeking to download the acrylic case design and extend the bottom out and cut out another with a laser cutter that would allow me to fit the heat sinks and a fan in the belly of the LattePanda, ill be sure to drop pics when done.

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LatteROFLCOPTER
Posts: 45
Joined: Mon May 16, 2016 6:00 am

Thu May 19, 2016 10:27 am

He did put one on the CPU.

See the pic at 8:51.

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Delphium
Posts: 20
Joined: Mon Apr 18, 2016 3:20 pm

Thu May 19, 2016 10:38 am

LatteROFLCOPTER wrote:He did put one on the CPU.

See the pic at 8:51.
Ahhh, OK, my bad, evidently I missed that.

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LatteROFLCOPTER
Posts: 45
Joined: Mon May 16, 2016 6:00 am

Thu May 19, 2016 1:46 pm

OK so I decided to install some mini heatsinks to see what happens.
While the LP has been stable for me, I'm not too happy with the high temps especially since it hasn't been hot weather.

The 'shield' (Really a Heat Spreader) will conduct the heat from the processor and spread it out over a larger surface area which is a good thing. Because of this, I decided to install the mini heatsinks directly on to the spreader.

I have some copper ones (commonly used on RPi) and an aluminium one, now as we all know copper is a much better conductor for heat. I still decided to use the aluminium one as it should at the very least help (I used one in my router which was overheating, and ever since there hasn't been any issues).

I also have the LP sitting on a small fan which is powered by USB (it's very quiet).
Attachments
StressTest.jpg
StressTest.jpg (200.02 KiB) Viewed 11491 times
Fan Base.jpg
Fan Base.jpg (102.75 KiB) Viewed 11491 times
Installed Heatsinks.jpg
Installed Heatsinks.jpg (172.97 KiB) Viewed 11491 times

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Delphium
Posts: 20
Joined: Mon Apr 18, 2016 3:20 pm

Thu May 19, 2016 3:54 pm

Likewise I have now also added a couple of RPi copper heat sink blocks and a 40mm fan attached to the case vents.
I decided to take the heat spreader off and applied the heat sinks directly to the various chips below it, this JUST fits inside the plastic case for the LP, with the fan mounted on the exterior of the case.

I have been running Prime95 along with a openGL audio visulization app for just over 5 hours now and the LP has remained solid on a 5V@2.5A PSU, the highest temp I achieved in the 5hours according to RealTemp was 71C peak, the average temp was around 55-60C (depending on core), however before this mod I was often hitting the thermal limit of 90C and have noticed much less thermal throttling due to this.

In all, it seems the LP does require some additional cooling over that of the heat spreaders provided.

Now to mod the case design for a deeper bottom and fire up the laser cutter so I can fit my fan internally along with the heat sinks!

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Williamd002
Posts: 3
Joined: Sat Apr 16, 2016 2:22 pm

Thu May 19, 2016 8:09 pm

How do you put a small pc fan on the latte panda? :)

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LatteROFLCOPTER
Posts: 45
Joined: Mon May 16, 2016 6:00 am

Fri May 20, 2016 10:12 am

Added more mini heatsinks and done another stress test.

A little bit better on the max temps side of thing, the min temps are up..but I didn't give it a chance to cool down, I'm not too concerned about them though.

It's funny that HWmonitor screwed up a little and reported 22w on the processor for a moment when I started it.
Attachments
StressTest2.PNG
StressTest2.PNG (128.7 KiB) Viewed 11406 times
Installed Heatsinks3.jpg
Installed Heatsinks3.jpg (158.22 KiB) Viewed 11406 times
Installed Heatsinks2.jpg
Installed Heatsinks2.jpg (129.5 KiB) Viewed 11406 times

User avatar
fgaine
Posts: 12
Joined: Sat May 21, 2016 11:30 am

Sat May 21, 2016 12:12 pm

PARKER wrote:https://youtu.be/XGjLYezHU10

Managed to get the cpu to drop by 10 / 15c see vid above
Hi Mate. Just watched your video carefully. Useful info, thank you for this. I have just a couple of questions:
-I am only intending on using the LattePanda as a media server and player for my TV, is it still at risk of overheating?
-Have you tried comparing temperatures with your fitted heatsinks but the case the right way up to see if it gives middle ground temperatures?

Cheers for that again.

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